MCQ Questions

Students are advised to practice the NCERT MCQ Questions for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants with Answers Pdf free download is available here. MCQ Questions for Class 11 Biology with Answers are prepared as per the Latest Exam Pattern. Students can solve these Photosynthesis in Higher Plants Class 11 MCQs Questions with Answers and assess their preparation level.

Photosynthesis in Higher Plants Class 11 MCQs Questions with Answers

Solving the Photosynthesis in Higher Plants Multiple Choice Questions of Class 11 Biology Chapter 13 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Photosynthesis in Higher Plants Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 13 Biology Class 11 and cross-check your answers during preparation.

I. Select the correct answer from the following questions:

Question 1.
Kranz anatomy is found in or is typical of
(a) C₃ plants
(b) C₄ plants
(c) C₂ plants
(d) Succulents (CAM Plants)

Answer

Answer: (b) C₄ plants

---

Question 2.
A cell that lacks chloroplast does not
(a) Utlize carbohydrates
(b) Evolve carbon dioxide
(c) Require water
(d) Liberate oxygen

Answer

Answer: (d) Liberate oxygen

---

Question 3.
Energy is transformed from the light reaction step to the dark reaction step by
(a) ATP
(b) RUBP
(c) ADP
(d) Chlorophyll

Answer

Answer: (a) ATP

---

Question 4.
Translocation of carbohydrates or sugars (photosynthetic products) in flowering plants occurs in the form of
(a) Glucose
(b) Starch
(c) Maltose
(d) Sucrose

Answer

Answer: (d) Sucrose

---

Question 5.
Photo-respiration is induced by
(a) High oxygen content
(b) High temperature
(c) High light intensity
(d) High CO₂ content

Answer

Answer: (a) High oxygen content

---

Question 6.
AH vegetation is only due to
(a) Oxygen
(b) CO₂
(c) Water
(d) Hydrogen

Answer

Answer: (c) Water

---

Question 7.
Site of dark reaction is
(a) Granum
(b) Unit membrane
(c) Lamella
(d) Stroma

Answer

Answer: (d) Stroma

---

Question 8.
All vegetation is only due to water was proved experimentally by
(a) Aristotle
(b) Van Helmont
(c) Joseph
(d) Stephen Hales

Answer

Answer: (b) Van Helmont

---

Question 9.
Vegetation always purifies the air was proved experimentally first by
(a) Liebig
(b) Warburg
(c) Stephen Hales
(d) Joseph Priestly

Answer

Answer: (d) Joseph Priestly

---

Question 10.
Reduction of NADP⁺ to NADPH occurs during
(a) PSI
(b) Calvin Cycle
(c) Cyclic photophosphorylation
(d) Non cyclic photophosphorylaction

Answer

Answer: (d) Non cyclic photophosphorylaction

---

Question 11.
Wastage of energy is associated with
(a) Krebs cycle
(b) Photorespiration
(c) Photosynthesis
(d) Glycolysis

Answer

Answer: (b) Photorespiration

---

Question 12.
Green plants convert solar energy into chemical energy of organic matter was proved by
(a) Joseph Priestly
(b) Van Mayer
(c) Semebier
(d) Lavoisier

Answer

Answer: (b) Van Mayer

---

Question 13.
When the rate of translocation is slow, the rate of photosyntheis shall
(a) Increase
(b) Decrease
(c) Remain Unaffected
(d) Become Zero

Answer

Answer: (b) Decrease

---

Question 14.
The first visible product of photosynthesis is
(a) Starch
(b) Glycogen
(c) Sugar
(d) Fatty acids

Answer

Answer: (b) Starch

---

Question 15.
The enzyme ribulose biphosphate carboxylase oxygenase is located in
(a) Mitochondria
(b) Chloroplasts
(c) Golgi bodies
(d) peroxisomes

Answer

Answer: (b) Chloroplasts

---

Question 16.
C₄ plants are
(a) Dicots
(b) Monocots
(c) Both dicots and monocots
(d) Cereals

Answer

Answer: (c) Both dicots and monocots

---

Question 17.
Photosynthesis has two reaction complexes, one followed by the other. The second seaction complex
(a) Traps light energy
(b) Fixes carbon dioxide
(c) Synthesizes starch
(d) Evolves oxygen

Answer

Answer: (b) Fixes carbon dioxide

---

Question 18.
Calvin cycle of C₄ plants operates in
(a) Stroma of bundle sheath chloroplasts
(b) The statement is wrong
(c) Grana of mesophyll chloroplasts
(d) Stroma of bundle sheath chloroplasts

Answer

Answer: (a) Stroma of bundle sheath chloroplasts

---

Question 19.
Flashing light experiment and existence of light and dark reactions were demonstrated first by
(a) Van iteil
(b) Emerson and Arnold
(c) Blackmann
(d) Warburg

Answer

Answer: (b) Emerson and Arnold

---

Question 20.
Mass flow hypothesis was given by
(a) Munch
(b) Dixon
(c) Devries
(d) Curtis

Answer

Answer: (a) Munch

---

Question 21.
Rate of photosynthesis is independent of
(a) CO₂
(b) Quality of light
(c) Light duration
(d) Light intensity

Answer

Answer: (d) Light intensity

---

Question 22.
Carbon dioxide acceptor in C₃ plants is
(a) RUBP
(b) PGA
(c) RMP
(d) PEP

Answer

Answer: (a) RUBP

---

Question 23.
Photosynthetic process is completed in
(a) mitochondria
(b) Chromatophores
(c) Chloroplasts
(d) Chlorophyll

Answer

Answer: (c) Chloroplasts

---

Question 24.
In photosynthesis
(a) CO₂ is reduced while water is oxidised
(b) Both CO₂ and H₂O are oxidised
(c) CO₂ is oxidised while H₂O is reduced
(d) Both CO₂ and H₂O are oxidised

Answer

Answer: (a) CO₂ is reduced while water is oxidised.

---

Question 25.
In C₃ plants, the first stable product of photosynthesis is
(a) Ribulose biphosphate
(b) Oxaloacetic acid
(c) Phosphoglyceric acid
(d) Glvceraldehyde 3-phosphate

Answer

Answer: (c) Phosphoglyceric acid.

---

Question 26.
Chloroplast DNA or Cl^– DNA is
(a) Circular
(b) Single stranded
(c) Naked
(d) All of these

Answer

Answer: (d) All of these

---

Question 27.
Photosynthetic units are of two types
(a) Photosystem I and II
(b) Chlorophylls and Carotenoids
(c) Carotenoids and phvcobilins
(d) Chlorophyll a and Chlorophyll b

Answer

Answer: (a) Photosystem I and II

---

Question 28.
Most effective wave length of light for photosynthesis is
(a) Yellow
(b) Green
(c) Red
(d) violet

Answer

Answer: (a) Red

---

Question 29.
Chloroplast pigments are
(a) Chlorophylls
(b) Phvcobilins
(c) Carotenoids
(d) All of these

Answer

Answer: (d) All of these

---

Question 30.
During synthesis of a glucose molecule, ATP and NADPH consumed are respectively
(a) 12 and 8
(b) 18 and 12
(c) 15 and 12
(d) 30 and 20

Answer

Answer: (b) 18 and 12

---

Question 31.
If plant stop photosynthesis which gas will disappear
(a) CO₂
(b) O₂
(c) NH₃
(d) N₂

Answer

Answer: (b) O₂

---

Question 32.
Which plant shows chloroplast dimorphism?
(a) Rice
(b) Sugar Beet
(c) Sugarcane
(d) Wheat

Answer

Answer: (c) Sugarcane

---

Question 33.
First product of photorespiration is
(a) Glycolate
(b) Glycine
(c) Phosphoglycolate
(d) Glyceine

Answer

Answer: (c) Phosphoglycolate

---

Question 34.
Which is a C₄ Plant?
(a) Sugarcane
(b) sorghum
(c) Maize
(d) All of these

Answer

Answer: (d) All of these

---

Question 35.
Natural hydrogen acceptor of Hill reaction is
(a) NADPH
(b) H₂O
(c) NADP
(d) None of these

Answer

Answer: (c) NADP

---

Question 36.
Photorespiration is characteristic of
(a) CAM Plants
(b) C₃ plants
(c) C₄ Plants
(d) All of these

Answer

Answer: (b) C_{3/sub> plants}

---

Question 37.
Calvin cycle is
(a) Dependent upon light
(b) Independent of light
(c) Inhibited by light
(d) Supported by light

Answer

Answer: (d) Supported by light

---

Question 38.
Which one is common product of both photosynthesis and respiration?
(a) ATP
(b) Chlorophyll
(c) Cytochrome
(d) Quinone

Answer

Answer: (a) ATP

---

Question 39.
C₄ Cycle was discovered in
(a) Chrysanthemum
(b) Groundnut
(c) Apple/Pea
(d) Sugarcane

Answer

Answer: (d) Sugarcane

---

Question 40.
In C₄ Plants, fixation of CO₂ occurs in
(a) cortex of stem
(b) palisade tissue
(c) Transfusion
(d) Spongy mesophyll and bundle sheath cells

Answer

Answer: (d) Spongy mesophyll and bundle sheath cells

---

Question 41.
Calvin cycle is investigated by the use of
(a) C¹⁴
(b) C¹²
(c) O¹⁸
(d) O¹⁶

Answer

Answer: (a) C¹⁴

---

Question 42.
The first receiver of CO₂ in C₄ plants is :
(a) Malic acid
(b) Phosphophenol
(c) Qxaloacetic acid
(d) Aspartic acid

Answer

Answer: (c) Qxaloacetic acid

---

Question 43.
The acceptor of CO₂ in C₃ plants is
(a) Xglulose-5-Phosphate
(b) 3- phosphoglyceric acid
(c) Phosphoenol pyruvic acid
(d) Ribulose 1, 5 biphosphate

Answer

Answer: (c) Ribulose 1, 5 biphosphate

---

Question 44.
RUBP of Calvin cycle is called in C₄ plants
(a) Secondary of final acceptor of CO₂
(b) Primary acceptor of CO₂
(c) Both (a) and (b)
(d) None of these

Answer

Answer: (a) Secondary of final cycle is called in CO₂

---

II. Fill in the blanks:

Question 1.
All animals including human beings depend on …………. for their food.

Answer

Answer: plants

---

Question 2.
Green plants carry out …………….. process by which they use light energy to derive the synthesis of organic compounds.

Answer

Answer: photosynthesis a physico chemical

---

Question 3.
Photosynthesis is important for life due to two reasons: It is the ……………. by which all food gets synthesised on earth and is also responsible for the release of ………… into the atmosphere by plants.

Answer

Answer: mechanism, oxygen

---

Question 4.
A first ………., ………… of photosynthesis was thus described.

Answer

Answer: action, spectrum

---

Question 5.
A milestone contribution to the understanding of …………… was that made by a microbiologist, ………….. (1897-1985), who based on his studies of ………….. and green …………

Answer

Answer: photosynthesis, Cornelius van Niel, purple, bacteria

---

Question 6.
6CO₂ + 12H₂O ……………..

Answer

Answer:

---

Question 7.
The membrane system is responsible for trapping the light energy and synthesising of ………. and …………..

Answer

Answer: ATP, NADPH

---

Question 8.
The former sets or reactions since they are light dependent are called ……………

Answer

Answer: light reactions

---

Question 9.
ATP and NADPH, can theoretically take place in the dark and are called ……………

Answer

Answer: dark reactions

---

Question 10.
Chromatography, that literally means ‘…………..’

Answer

Answer: colour writing

---

Question 11.
We see in leaves is not due to a single pigment but due to four pigments: chlorophyll a (bright or blue green in the chromatogram), chlorophyll b (yellow green), ………… (yellow) and …………. (yellow to yellow-orange).

Answer

Answer: Xanthophylls, Carotenoids

---

Question 12.
Of course you are familiar with the. wavelength of the visibl specturm of light as well as the ……………

Answer

Answer: VIBGYOR

---

Question 13.
The pigments chlorophyll b and the carotenoids -Xanthophylls and carotene are called …………….

Answer

Answer: accessory pigments

---

Question 14.
In PSI the reaction centre chlorophyll a has an absoiption pea at 700 nm hence is called ……………. while in PS II it has absorption maxim.” at 680 nm, and is called ……………

Answer

Answer: P₇₀₀, P₆₈₀

---

Question 15.
When the two photosystems work in a series, first PS II and the: PS I, a process called …………….. occurs.

Answer

Answer: non-cyclic photo-phosphosylation

---

Question 16.
The Calvin pathway occurs in ……………

Answer

Answer: all photorynthetic plants

---

Question 17.
C₄ plants are special they have a special type of …………. anatomy they tolerate higher ………….. they show a response to highligh ………., they lack a process called ………….. and have greate productivity.

Answer

Answer: leaf, temperatures, intensities, photorespiration

---

Question 18.
The particularly large cells around the vascular bundles of the C₄ pathway plants are called ………….. and the leaves which have such anatomy are said to have ‘…………..’ anatomy.

Answer

Answer: bundle sheath cells, Kranz

---

Question 19.
In C₃ plants some O₂ does bind to RuBisco, and hence CO₂ fixation is decreased. Here the RUBP instead of being converted to PGA is broken down in a pathway called …………….

Answer

Answer: Photorespiration

---

Question 20.
The C₄ plants respond to ………….. and show higher rate of …………. while C₃ plants have a much ………….

Answer

Answer: higher temperatures, photosynthesis, temperature optimum

---

III. Mark the statement True (T) or False (F)

Question 1.
Water stress causes the stomata to close hence reducing the CO₂ availability.

Answer

Answer: True

---

Question 2.
Tropical plants have a higher temperature optimum than that of the plants adapted to temperate climates.

Answer

Answer: True

---

Question 3.
The C₄ plants show saturation at about 450 µ. L^-1 while C₃ responds to increased CO₂ concentration and saturation is seen only beyond 360µ. L^-1

Answer

Answer: True

---

Question 4.
Green plants carry out ‘photosynthesis’, a physico-chemical process by which they use light energy to drive the synthesis of organic compounds.

Answer

Answer: True

---

Question 5.
Julius Von Sachs in 1770’s performed a series of experiment that revealed the essential role of air in growth of green plants.

Answer

Answer: False

---

Question 6.
Joseph Priestlay showed that sunlight is essential to the plant process that somehow purifies the air fouled by burning candles or breathing animals.

Answer

Answer: False

---

Question 7.
Jan Ingenhourz provided evidence for production of glucose when plants grow.

Answer

Answer: False

---

Question 8.
The former set of reations since they are light dependent, are called light reactions.

Answer

Answer: True

---

Question 9.
The pigments are organised into two discrete photochemical fight harvesting complexes (LHC) called photosystem I (PS-I) and Photosystem II (PS II).

Answer

Answer: True

---

Question 10.
Reduction is the most crucial step of the Calvin cycle where CO₂ is utilised for the carboxylation of RUBP.

Answer

Answer: False

---

Question 11.
C₄ Plants are special: They have a special type of leaf anatomy, they tolerate higher temperatures, they show a response to high fight intensities, they lack a process called photorespiration and have greater productivity of biomass.

Answer

Answer: True

---

Question 12.
The primary CO₂ acceptor is 3 carbon molecule phosphoenol pyruvate (PEP) and is present in the mesophyll cells.

Answer

Answer: True

---

Question 13.
Oxygen is the major limiting factor for photosynthesis.

Answer

Answer: False

---

Question 14.
The C₃ plants respond to higher temperatures and show higher rate of photosynthesis while C₄ plants have a much lower temperature optimum.

Answer

Answer: False

---

Question 15.
The vascular bundles of the C₄ pathway plants are called bundle sheath cells, and the leaves which have such anatomy are said to have ‘kranz’ anatomy.

Answer

Answer: True

---

IV Match the items in Column I with the items in Column II

Column I	Column II
(a) Photosynthesis	1. Out 18 ADP
(b) It was not until about 1854 that Julius	2. Law of limiting factors
(c) T.W Engelmann	3. Consisting of cytochromes
(d) The former set of reactions since they are directly light driven	4. a physico-chemical process
(e) Wavelength of the visible specturm	5. light absorption, water splitting, oxygen release
(f) electrons transport system	6. the plants adapted to temperate climates.
(g) Calvin cycle : In 18 ATP	7. Von Sachs provided evidence for production of glucose when plants grow.
(h) Calvin cycle : In six CO2	8. of light as well as the VIBGYOR.
(i) RiBulose bisphosphate carboxy-lase-oxygenase	9. Using a prism he split light into its spectral components and then illuminated a green alga, cladophora.
(j) Blackman’s (1905)	10. are called dark reactions
(k) Tropical plants have a higher temperature optimum than	11. out one Glucose
(l) Photochemical phase	12. (RuBisco)
(m) PS I	13. P700
(n) PS II	14. Purple and green bacteria
(o) Cornelius Van Niel (1897 – 1985), who based on his studies of	15. P680

Answer

Answer:

Column I	Column II
(a) Photosynthesis	4. a physico-chemical process
(b) It was not until about 1854 that Julius	7. Von Sachs provided evidence for production of glucose when plants grow.
(c) T.W Engelmann	9. Using a prism he split light into its spectral components and then illuminated a green alga, cladophora.
(d) The former set of reactions since they are directly light driven	10. are called dark reactions
(e) Wavelength of the visible specturm	8. of light as well as the VIBGYOR.
(f) electrons transport system	3. Consisting of cytochromes
(g) Calvin cycle : In 18 ATP	1. Out 18 ADP
(h) Calvin cycle : In six CO2	11. out one Glucose
(i) RiBulose bisphosphate carboxy-lase-oxygenase	12. (RuBisco)
(j) Blackman’s (1905)	2. Law of limiting factors
(k) Tropical plants have a higher temperature optimum than	6. the plants adapted to temperate climates.
(l) Photochemical phase	5. light absorption, water splitting, oxygen release
(m) PS I	13. P700
(n) PS II	15. P680
(o) Cornelius Van Niel (1897 – 1985), who based on his studies of	14. Purple and green bacteria

---

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Recent Developments in Indian Politics Class 12 MCQs Questions with Answers

Question 1.
Who was the chairperson of the Mandal Commission?
(a) Bindeshwari Prasad Mandal
(b) Nandeshwari Prasad Mandal
(c) Chandeshwari Prasad Mandal
(d) None of the Above

Answer

Answer: (a) Bindeshwari Prasad Mandal

---

Question 2.
Which alliance formed the government at the center in 1989?
(a) National Front
(b) United Front
(c) Super Front
(d) Real Front

Answer

Answer: (a) National Front

---

Question 3.
Who headed the central government in India after the 1998 parliamentary elections?
(a) Atal Bihari Vajpayee
(b) P.V. Narsimha Rao
(c) H. D. Deve Gowda
(d) I. K. Gujral

Answer

Answer: (a) Atal Bihari Vajpayee

---

Question 4.
The recommendations of the Mandal Commission were implemented in the year
(a) 1990
(b) 1991
(c) 1992
(d) 1993

Answer

Answer: (a) 1990

---

Question 5.
Choose the correct term for coming together of two or more political parties to form a government.
(a) United Government
(b) Coalition Government
(c) National Government
(d) None of the above

Answer

Answer: (b) Coalition Government

---

Question 6.
The General Elections of 2004 resulted in
(a) dominance of Congress
(b) coalition government
(c) convincing victory of BJP
(d) the emergence of Akali Dal

Answer

Answer: (b) coalition government

---

Question 7.
The reason for the 2002 Gujarat riots is
(a) earthquake relief was not provided by the Centre
(b) A bogey of a train returning from Ayodhya carrying Karsevaks was set on fire
(c) demolition of Babri masjid
(d) state emergency

Answer

Answer: (b) A bogey of a train returning from Ayodhya carrying Karsevaks was set on fire

---

Question 8.
The single largest party in the 1996 parliamentary elections was
(a) Bhartiya Janta Party
(b) Janta Dal
(c) CPI
(d) Congress

Answer

Answer: (a) Bhartiya Janta Party

---

Question 9.
Prime Minister Rajiv Gandhi was assassinated in the year
(a) 1989
(b) 1990
(c) 1991
(d) 1992

Answer

Answer: (c) 1991

---

Question 10.
The political developments after the 1990s reveal the emergence of
(a) coalition government
(b) consolidation of BJP
(c) congress dominance
(d) regional politics

Answer

Answer: (a) coalition government

---

Question 11.
Which party pursued the politics of ‘Hindutva’ and adopted the strategy of mobilising the Hindus?
(a) Bhartiya Janata Party
(b) Congress
(c) Communist Party of India
(d) Bahujan Samaj Party

Answer

Answer: (a) Bhartiya Janata Party

---

Question 12.
In February and March 2002, large scale violence against Muslims took place in
(a) Rajasthan
(b) Gujarat
(c) Punjab
(d) Uttar Pradesh

Answer

Answer: (b) Gujarat

---

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Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 1 Matter in Our Surroundings with Answers Pdf free download is available here. MCQ Questions for Class 9 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Matter in Our Surroundings Class 9 MCQs Questions with Answers and assess their preparation level.

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Solving the Matter in Our Surroundings Multiple Choice Questions of Class 9 Science Chapter 1 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Matter in Our Surroundings Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 1 Science Class 9 and cross-check your answers during preparation.

Multiple Choice Questions

Question 1.
The mass per unit volume of a substance is:
(a) acceleration
(b) density
(c) velocity
(d) weight

Answer

Answer: (b) density

---

Question 2.
The melting point of ice is:
(a) 273.16 K
(b) 723.16 K
(c) 263.16 K
(d) 373 K

Answer

Answer: (a) 273.16 K

---

Question 3.
What is dry ice?
(a) Solid carbon dioxide
(b) Nitrogen oxide
(c) Carbon mono oxide
(d) None of them

Answer

Answer: (a) Solid carbon dioxide

---

Question 4.
Which of the following state is responsible for the glow in the sun and stars?
(a) Solid
(b) Liquid
(c) Plasma
(d) Gas

Answer

Answer: (c) Plasma

---

Question 5.
Which of the following phenomenon takes place when we add a drop of Dettol into the water?
(a) osmosis
(b) diffusion
(c) sublimation
(d) none of them

Answer

Answer: (b) diffusion

---

Question 6.
During summer, water kept in an earthen pot becomes cool because of the phenomenon of:
(a) diffusion
(b) transpiration
(c) osmosis
(d) evaporation

Answer

Answer: (d) evaporation

---

Question 7.
Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of the water
(b) Decrease in temperature of the water
(c) Less exposed surface area of water
(d) Adding common salt to the water

Answer

Answer: (a) Increase in temperature of the water

---

Fill in the Blanks.

Question 8.
Early Indian philosophers classified matter into _______ basic forms or elements.

Answer

Answer: five

---

Question 9.
The common unit of measuring volume is ________

Answer

Answer: litre

---

Question 10.
With increase in temperature the kinetic energy of the particles _________

Answer

Answer: increases

---

Question 11.
The rate of diffusion of liquids is _______ than that of solids.

Answer

Answer: higher

---

Question 12.
To change a temperature on the Kelvin scale to the Celsius scale you have to subtract ________ from the given temperature.

Answer

Answer: 273

---

Question 13.
______ is the amount of water vapour present in the air.

Answer

Answer: Humidity

---

True/False.

Question 14.
Gases are highly compressible as compared to solids and liquids.

Answer

Answer: True

---

Question 15.
Liquids have fixed volume and shape.

Answer

Answer: False

---

Question 16.
Compressed natural gas (CNG) is used as fuel these days in vehicles.

Answer

Answer: True

---

Question 17.
The state of matter cannot be changed by changing temperature or pressure.

Answer

Answer: False

---

Question 18.
The states of matter are inter-convertible.

Answer

Answer: True

---

Question 19.
In solids, the space between the particles is maximum.

Answer

Answer: False

---

Match the Column.

Question 20.

A	B
1. Unit of temperature	(i) Kilogram (kg)
2. S.I. unit of mass	(ii) Kilogram per cubic metre
3. S.I. unit of pressure	(iii) Newton
4. Unit of weight	(iv) Kelvin
5. Unit of density	(v) Pascal

Answer

Answer:

A	B
1. Unit of temperature	(iv) Kelvin
2. S.I. unit of mass	(i) Kilogram (kg)
3. S.I. unit of pressure	(v) Pascal
4. Unit of weight	(iii) Newton
5. Unit of density	(ii) Kilogram per cubic metre

---

Answer in one Word/Sentence.

Question 21.
What is that process known as in which a solid is converted directly into the gaseous state without coming to a liquid state?

Answer

Answer: Sublimation

---

Question 22.
How many states of matter exist normally in nature?

Answer

Answer: Three states

---

Question 23.
What is that temperature called at which solid melts to become a liquid at the atmospheric pressure?

Answer

Answer: Melting point

---

Question 24.
What is the state of matter which has maximum compressibility?

Answer

Answer: Gaseous state

---

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Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 3 Atoms and Molecules with Answers Pdf free download is available here. MCQ Questions for Class 9 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Atoms and Molecules Class 9 MCQs Questions with Answers and assess their preparation level.

Atoms and Molecules Class 9 MCQs Questions with Answers

Solving the Atoms and Molecules Multiple Choice Questions of Class 9 Science Chapter 3 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Atoms and Molecules Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 3 Science Class 9 and cross-check your answers during preparation.

Multiple Choice Questions

Question 1.
Who coined the term ‘Parmanu’ for the smallest indivisible particles?
(a) Leucippus
(b) L. Lavoisier
(c) Kanad
(d) None of them

Answer

Answer: (c) Kanad

---

Question 2.
The radius of a hydrogen atom is:
(a) 10^-2
(b) 10^-4
(c) 10^-9
(d) 10^-10

Answer

Answer: (d) 10^-10

---

Question 3.
The most remarkable concept that Dalton’s atomic theory proposed was that of the:
(a) atomic weight
(b) atomic mass
(c) molar mass
(d) none of them

Answer

Answer: (b) atomic mass

---

Question 4.
The atomic mass of carbon is:
(a) 12
(b) 14
(c) 16
(d) 23

Answer

Answer: (a) 12

---

Question 5.
Compounds composed of metals and non-metals contain:
(a) non-charged species
(b) charged species
(c) both of them
(d) none of them

Answer

Answer: (b) charged species

---

Question 6.
The formula of ammonium sulphate is:
(a) NHSO₄
(b) NH₄SO₂
(c) NHSO₃
(d) (NH₄)₂SO₄

Answer

Answer: (d) (NH₄)₂SO₄

---

Question 7.
The word “mole” was introduced around 1896 by:
(a) Wilhelm Ostwald
(b) John Dalton
(c) Avogadro
(d) Vergilious

Answer

Answer: (a) Wilhem Ostwald

---

Question 8.
The chemical symbol for sodium is:
(a) So
(b) Sd
(c) NA
(d) Na

Answer

Answer: (d) Na

---

Question 9.
Which of the following has a maximum number of atoms?
(a) 18 g of H₂O
(b) 18 g of O₂
(c) 18 g of CO₂
(d) 18 g of CH₄

Answer

Answer: (d) 18 g of CH₄

---

Question 10.
Which of the following contains a maximum number of molecules?
(a) 1g CO₂
(b) 1g N₂
(c) 1g H₂
(d) 1g CH₄

Answer

Answer: (c) 1g H₂

---

Fill in the Blanks.

Question 11.
In a compound such as water, the ratio of the mass of hydrogen to the mass of oxygen is always ______

Answer

Answer: 1 : 8

---

Question 12.
Atomic radius is measured in ________

Answer

Answer: nanometre

---

Question 13.
The symbol of iron is Fe from its Latin name _________

Answer

Answer: Ferrum

---

Question 14.
One atomic mass unit is a mass unit equal to exactly ________ the mass of one atom of carbon-12.

Answer

Answer: \(\frac{1}{12}\)th

---

Question 15.
The formula unit mass of a substance is a sum of the atomic ______ of all its constituent atoms.

Answer

Answer: masses

---

Question 16.
Avogadro number is represented by ________

Answer

Answer: N₀

---

Question 17.
The relative mass of atoms of all elements is obtained by comparing them with the mass of a _______ atom.

Answer

Answer: Carbon-12

---

Question 18.
The Avogadro constant 6.022 × 10²³ is defined as the number of atoms in exactly ______ of carbon-12.

Answer

Answer: 12 g

---

True/False.

Question 19.
An atom is the smallest particle of the element that cannot usually exist independently and retains all its chemical properties.

Answer

Answer: True

---

Question 20.
The Law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction.

Answer

Answer: True

---

Question 21.
The mass of 1 mole of a substance is equal to its relative atomic or molecular mass in grams.

Answer

Answer: True

---

Question 22.
16u oxygen has 16 atoms of oxygen.

Answer

Answer: False

---

Question 23.
The atomic mass of calcium is 40.

Answer

Answer: True

---

Question 24.
Aluminium is diatomic.

Answer

Answer: False

---

Match the Column.

Question 25.

A	B
1. 1 mole of carbon atoms	(i) 1 g of H atoms
2. 1 mole of molecules	(ii) Molecular mass in gram
3. 1 mole of hydrogen atoms	(iii) Relative mass of those particles in gram
4. 1 mole of any particle (atoms, molecules, ions)	(iv) 12-gram carbon atoms

Answer

Answer:

A	B
1. 1 mole of carbon atoms	(iv) 12-gram carbon atoms
2. 1 mole of molecules	(ii) Molecular mass in gram
3. 1 mole of hydrogen atoms	(i) 1 g of H atoms
4. 1 mole of any particle (atoms, molecules, ions)	(iii) Relative mass of those particles in gram

---

Answer in one Word/Sentence.

Question 26.
What is the value of the Avogadro number?

Answer

Answer: 6.022 × 10²³

---

Question 27.
How many atoms of hydrogen are there in 1g of hydrogen?

Answer

Answer: 6.022 × 10²³

---

Question 28.
What name is given to a group of atoms carrying a charge?

Answer

Answer: Polyatomic ions

---

Question 29.
What term is given to the mass of one-mole atoms of a substance?

Answer

Answer: Molar mass

---

Question 30.
Write the chemical formula of calcium hydroxide.

Answer

Answer: Ca(OH)₂

---

Question 31.
Write the chemical formula of sulphuric acid?

Answer

Answer: H₂SO₄

---

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Students are advised to practice the NCERT MCQ Questions for Class 11 Biology Chapter 14 Respiration in Plants with Answers Pdf free download is available here. MCQ Questions for Class 11 Biology with Answers are prepared as per the Latest Exam Pattern. Students can solve these Respiration in Plants Class 11 MCQs Questions with Answers and assess their preparation level.

Respiration in Plants Class 11 MCQs Questions with Answers

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I. Select the correct answer from the following questions:

Question 1.
Major fraction of CO₂ released during cellular respiration is transported in blood through the lungs in the form of
(a) Free CO₂
(b) HCO₃
(c) H₂ CO₃
(d) In combination with Hb CO₂

Answer

Answer: (c) H₂ CO₃

---

Question 2.
Sudden deep inspiration is due to
(a) Increase in concentration of CO₂
(b) Increase in concentration of O₂
(c) Either increase in cone, of CO₂ or decrease in concentration of O₂
(d) Decrease in concertration of CO₂

Answer

Answer: (a) Increase in concentration of CO₂

---

Question 3.
Fixing of CO₂ and liberation of oxygen in light is done with the help of
(a) chioroplast
(b) Mesophyll cells
(c) Mitocondria
(d) Chromatophores

Answer

Answer: (a) Chioroplast

---

Question 4.
AH vegetation is only due to
(a) CO₂
(b) Water
(c) Oxygen
(d) Hydrogen

Answer

Answer: (b) Water

---

Question 5.
Chioroplast DNA or ct DNA is
(a) Naked
(b) Circular
(c) Single stranded
(d) All of these

Answer

Answer: (d) All of these

---

Question 6.
During synthesis of a glucose molecule, ATP and NADPH consumed are respectively
(a) 15 and 12
(b) 12 and 8
(c) 30 and 20
(d) 18 and 12

Answer

Answer: (d) 18 and 12

---

Question 7.
Photorespiration takes place in
(a) Lvsosomes
(b) Peroxisomes
(c) Ribosomes
(d) Mitochondria

Answer

Answer: (b) Peroxisomes

---

Question 8.
Chlorophyll ‘a’ is found in all
(a) Oxygen liberation photosvnthetic organisms
(b) Autotrophs
(c) Higher plants
(d) Algae

Answer

Answer: (a) Oxygen liberation photosynthetic organisms

---

Question 9.
The atmosphere contains CO₂ by volume
(a) 0.1%
(b) 0.5%
(c) 0.03%
(d) 0.3%

Answer

Answer: (c) 0.03 %

---

Question 10.
Green plants convert solar energy into chemical energy of organic matter was proved by
(a) Van Mayer
(b) Lavoisier
(c) Joseph Priestly
(d) Semebier

Answer

Answer: (a) Van Mayer

---

Question 11.
Wastage of energy is associated with
(a) Glycolysis
(b) Photosynthesis
(c) Krebs cycle
(d) Photorespiration

Answer

Answer: (d) Photorespiration

---

Question 12.
If a photosvnthesising plant releases oxygen containing more amount of lsO, it is concluded that the plant has been supplied with
(a) ¹⁸O from ¹⁸ CO₂
(b) ¹⁸O from ¹⁸CO₂
(c) ¹⁸O from H₂ ¹⁸O
(d) .None of these

Answer

Answer: (c) ¹⁸ O from H₂ ¹⁸O

---

Question 13.
Carbon dioxide acceptor in C₃ plants is:
(a) RuBP
(b) RMP
(c) PGA
(d) PEP

Answer

Answer: (a) RuBP

---

Question 14.
Photosynthetic process is completed in
(a) Chloroplasts
(b) Chlorophyll
(c) Chromatophores
(d) Mitochondria

Answer

Answer: (a) Chloroplasts.

---

Question 15.
During synthesis of a glucose molecule, ATP and NADPH consumed are respectively
(a) 12 and 8
(b) 30 and 20
(c) 15 and 12
(d) 18 and 12

Answer

Answer: (d) 18 and 12

---

Question 16.
First product of photorespiration is
(a) Glycolate
(b) Glycine
(c) Glvceine
(d) Phosphoglycolate

Answer

Answer: (d) Phosphoglycolate

---

Question 17.
The breaking of the C-C bonds of complex compounds through oxidation within the cells, leading to release of considerable amount of energy is called
(a) respiration
(b) respiratory substrates
(c) Cellular respiration
(d) All of these

Answer

Answer: (a) Respiration

---

Question 18.
The TCA cycle starts with the condensation of acetyl group with
(a) Oxaloacetic acid
(b) Water to yield citric acid
(c) (a) and (b) Both
(d) None of these

Answer

Answer: (c) (a) and (b) Both

---

Question 19.
The metabolic pathway through which the electron passes from one carrier to another, is called the
(a) Electron transport system
(b) Complex I
(c) Complex II
(d) Complex IV

Answer

Answer: (a) Electron transport system

---

Question 20.
NADH produced in the mitochondrial matrix during citric acid cycle are oxidised by an NADH dehydrogenase
(a) Complex I
(b) Complex II
(c) Complex III
(d) Complex IV

Answer

Answer: (a) Complex I

---

Question 21.
The energy released during the electron transport system is utilised in synthesising ATP with the help of ATP synthase
(a) Complex III
(b) Complex IV
(c) Complex V
(d) None of these

Answer

Answer: (c) Complex V

---

Question 22.
The ratio of the volume of CO₂ evolved to the volume of O₂ consumed in respiration is called the
(a) respiratory quotient
(b) amphibolic pathway
(c) catabolism
(d) anabolism

Answer

Answer: (a) Respiratory quotient.

---

II. Fill in the blanks:

Question 1.
All the energy required for ‘life’ processes is obtained by oxidation of some macromolecules that we call ……………

Answer

Answer: Food

---

Question 2.
Green plants trap light energy and convert it into chemical energy that is stored in the bonds of carbohydrates like ………., ………… and ………….

Answer

Answer: glucose, sucrose, starch

---

Question 3.
Animals are …………… i.e. they obtain food form plants directly (herbivores) or indirectly (carnivores).

Answer

Answer: heterotrophic

---

Question 4.
The compounds that are oxidised during this process are known as …………….

Answer

Answer: respiratory substrates

---

Question 5.
………., ………… and …………. respire at rates far lower than are characteristic for animals.

Answer

Answer: Root, stems, leaves

---

Question 6.
In stems, the ‘…………..’ cells are organised in thin layers in and beneath the bark.

Answer

Answer: living

---

Question 7.
The complete ……………. of glucose, which produces CO₂ and H₂O as end products, yields energy most of which is given out as heat.

Answer

Answer: combustion

---

Question 8.
The scheme of glycolysis was given by …………….. and J.Pamas, and is often referred to as the …………. pathway.

Answer

Answer: Gustav Embden, Otto Meyerhof, EMP

---

Question 9.
……………. are phosphorylated to give rise to glucose- 6-phosphate by the activity of the enzyme hexokinase.

Answer

Answer: Glucose and fructose

---

Question 10.
ATP is utilised at two steps: first in the conversion of ………… into glucose 6-phosphate and second in the conversion of ………….. 6- phosphate to fructose 1, 6-diphosphate.

Answer

Answer: glucose, fructose

---

Question 11.
These are ………….. major ways in which different cells handle Pyruvic acid produced by glycolysis.

Answer

Answer: three,

---

Question 12.
In fermentation, say by yeast, the incomplete oxidation of glucose is achieved under anaerobic conditions by sets of reactions where ………… is converted to CO₂ and ethanol.

Answer

Answer: Irrational

---

Question 13.
In a coupled reaction GTP is converted to GDP with the stimultaneous synthesis of ……….. from …………

Answer

Answer: ATP, ADP

---

Question 14.
When the electrons pass from one carrier to another via complex I to IV in the electron transport chain, they are coupled to ATP synthase (complex V) for the production of …………. from …………… and ……………..

Answer

Answer: ATP, ADP, inorganic phosphate

---

Question 15.
………… is favoured substrate for respiration.

Answer

Answer: Glucose

---

III. Mark the statement True (T) or False (F)

Question 1.
Saprophytes like fungi are dependent on green plant.

Answer

Answer: False

---

Question 2.
Usually carbohydrates are oxidised to release energy, but proteins, fats and even organic acids can be used as respiratory substances in some plants, under certain conditions.

Answer

Answer: True

---

Question 3.
Only during photosynthesis are large volumes of gases exchanged and each leaf is well adapted to take care of its own needs during these periods.

Answer

Answer: True

---

Question 4.
In stems, the ‘living’ cells are organised in thin layers in and beneath the bark. They also have openings called lenticels.

Answer

Answer: True

---

Question 5.
The combustion reaction requires carbon.

Answer

Answer: False

---

Question 6.
Sucrose is converted into glucose and fructose by the enzyme invertase, and these two monosaccharides can readily enter the glycolytic pathway.

Answer

Answer: True

---

Question 7.
For the complete oxidation of glucose to O₂ and CO₂, however, organisms adopt Kreb’s cycle which is also called as aerobic respiration. This requires CO₂ supply.

Answer

Answer: False

---

Question 8.
Yeasts poison themselves to death when the concentration of alcohol reaches about 25 percent.

Answer

Answer: False

---

Question 9.
The complete oxidation of pyruvate by the stepwise removel of all the hydrogen atoms, leaving three molecules of CO₂.

Answer

Answer: True

---

Question 10.
In the remaining steps of citric acid cycle, succinyl-CoA is oxidised to OAA allowing the cycle to continue.

Answer

Answer: True

---

Question 11.
The reduced ubiquinone (Ubiquinol) is than oxidised with the transfer of electrons to cytochrome C via cytochrome be complex (complex III).

Answer

Answer: True

---

Question 12.
The F₁ headpiece is a peripheral membrane protein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate.

Answer

Answer: True

---

Question 13.
NADH is oxidised to NAD^– rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration.

Answer

Answer: True

---

Question 14.
Glycerol would enter the pathway after being conveted to PGAL.

Answer

Answer: True

---

Question 15.
Pure proteins or fats are never used as respiratory substrates.

Answer

Answer: True

---

IV. Match the items of column I with the items of column II

Column I	Column II
(a) Plants require O2 for respiration to occur	1. TCA
(b) Breakdown of glucose to Dyruvic acid is	2. Converted into DPGA.
(c) PGAL is oxidised and with inorganic phosphate to get	3. inadequate for cellular respiration pyruvic acid is reduced to lactic acid by locate dehydrogenase.
(d) Pyruvic acid is then the key product	4. and they also give out CO2
(e) In animal cells also, like muscles during exercise, when oxygen is	5. NADH + H+ and FADH2
(f) Aerobic respiration	6. called glycolysis
(g) Pyruvate is transported from the cytoplasm into the mitochondria.	7. oxidative phosphorylation.
(h) Tricarboxylic acid cycle	8. of glycolysis.
(i) Citrate is then isomerised to isocitrate	9. through which protons cross the inner membrane
(j) In the respiratory process are to release and utilise the energy stored in	10. The NADH synthesised in glycolysis is transferred into the mitochondria and under-goes oxidative phosphorylation.
(k) In respiration it is the energy of oxidation-reduction utilised for the same process.	11. Aerobic respiration
(l) F0 is an integral membrane protein complex that form the channel	12. is the process that leads to a complete oxidation of organic sub-stances in the presence of oxygen, and releases CO2
(m) The respiratory balance sheet	13. It is followed by two successive steps of decarboxylation, leading to the formation of α -ketoglutaric acid then succinvI-CoA
(n) Glycerol would enter the pathway after being converted to	14. PGAL
(o) RQ +	15. Volume of CO2 evolved

Answer

Answer:

Column I	Column II
(a) Plants require O<sub>2</sub> for respiration to occur	4. and they also give out CO<sub>2</sub>
(b) Breakdown of glucose to Dyruvic acid is	6. called glycolysis
(c) PGAL is oxidised and with inorganic phosphate to get	2. Converted into DPGA.
(d) Pyruvic acid is then the key product	8. of glycolysis.
(e) In animal cells also, like muscles during exercise, when oxygen is	3. inadequate for cellular respiration pyruvic acid is reduced to lactic acid by locate dehydrogenase.
(f) Aerobic respiration	12. is the process that leads to a complete oxidation of organic sub-stances in the presence of oxygen, and releases CO2
(g) Pyruvate is transported from the cytoplasm into the mitochondria.	11. Aerobic respiration
(h) Tricarboxylic acid cycle	1. TCA
(i) Citrate is then isomerised to isocitrate	13. It is followed by two successive steps of decarboxylation, leading to the formation of α -ketoglutaric acid then succinvI-CoA
(j) In the respiratory process are to release and utilise the energy stored in	5. NADH + H+ and FADH2
(k) In respiration it is the energy of oxidation-reduction utilised for the same process.	7. oxidative phosphorylation.
(l) F0 is an integral membrane protein complex that form the channel	9. through which protons cross the inner membrane
(m) The respiratory balance sheet	10. The NADH synthesised in glycolysis is transferred into the mitochondria and under-goes oxidative phosphorylation.
(n) Glycerol would enter the pathway after being converted to	14. PGAL
(o) RQ +	15. Volume of CO2 evolved

---

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Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom with Answers Pdf free download is available here. MCQ Questions for Class 9 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Structure of the Atom Class 9 MCQs Questions with Answers and assess their preparation level.

Structure of the Atom Class 9 MCQs Questions with Answers

Solving the Structure of the Atom Multiple Choice Questions of Class 9 Science Chapter 4 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Structure of the Atom Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 4 Science Class 9 and cross-check your answers during preparation.

Multiple Choice Questions

Question 1.
In 1906, J.J. Thomson was awarded the Nobel prize for his discovery of:
(a) Electron
(b) Proton
(c) Neutron
(d) Positron

Answer

Answer: (a) Electron

---

Question 2.
Who discovered the nucleus of an atom?
(a) J.J. Thomson
(b) Neils Bohr
(c) Rutherford
(d) J. Chadwick

Answer

Answer: (c) Rutherford

---

Question 3.
Who is known as the ‘Father of nuclear Physics’?
(a) J. J. Thomson
(b) E. Rutherford
(c) Neils Bohr
(d) J. Chadwick

Answer

Answer: (b) E. Rutherford

---

Question 4.
An atomic number of an element equals to what present in the nucleus of its atom?
(a) Protons
(b) Electrons
(c) Both of them
(d) None of them

Answer

Answer: (a) Protons

---

Question 5.
Rutherford’s alpha-particle scattering experiment was responsible for the discovery of:
(a) Atomic nucleus
(b) Electron
(c) Proton
(d) Neutron

Answer

Answer: (a) Atomic nucleus

---

Question 6.
Isotopes of an element have:
(a) the same physical properties
(b) different chemical properties
(c) different number of neutrons
(d) different atomic numbers

Answer

Answer: (c) different number of neutrons

---

Question 7.
Number of valence electrons in CP ion are:
(a) 16
(b) 8
(c) 17
(d) 18

Answer

Answer: (b) 8

---

Question 8.
Which one of the following is a correct electronic configuration of sodium?
(a) 2, 8
(b) 8, 2, 1
(c) 2, 1, 8
(d) 2, 8, 1

Answer

Answer: (d) 2, 8, 1

---

Question 9.
Who used the term ‘ATOM’ for the first time?
(a) Rutherford
(b) John Dalton
(c) Chadwick
(d) Bohr

Answer

Answer: (b) John Dalton

---

Question 10.
Which of the following are called nucleon?
(a) Protons
(b) Neutrons
(c) Electrons
(d) Both, Protons and Neutrons

Answer

Answer: (d) Both, Protons and Neutrons

---

Question 11.
Which of the following particles was discovered first?
(a) Neutron
(b) Electron
(c) Proton
(d) Meson

Answer

Answer: (b) Electron

---

Question 12.
Which of the following atom does not have the neutron?
(a) Carbon
(b) Nitrogen
(c) Hydrogen
(d) Helium

Answer

Answer: (c) Hydrogen

---

Question 13.
Who gave the name ‘Proton’ the positively charged particles of an atom?
(a) Chadwick
(b) Goldstein
(c) Rutherford
(d) John Dalton

Answer

Answer: (c) Rutherford

---

Question 14.
The maximum number of electrons in any shell of an atom is:
(a) n²
(b) 2n²
(c) (n – 1)²
(d) 3n²

Answer

Answer: (b) 2n²

---

Question 15.
Which of the following rays have the maximum penetration power?
(a) α-rays
(b) X-rays
(c) γ-rays
(d) Cathod rays

Answer

Answer: (c) γ-rays

---

Question 16.
Who gave the first model of the atom?
(a) J.J. Thomson
(b) Chadwick
(c) Goldstein
(d) Neils Bohr

Answer

Answer: (a) J.J. Thomson

---

Fill in the Blanks.

Question 17.
______ are atoms of the same element, which have different mass numbers.

Answer

Answer: Isotopes

---

Question 18.
_______ are atoms having the same mass number but different atomic numbers.

Answer

Answer: Isobars

---

Question 19.
Neutrons are present in the nucleus of all atoms, except ________

Answer

Answer: hydrogen

---

Question 20.
α-particles are doubly-charged _________ ions.

Answer

Answer: helium

---

Question 21.
Neutron was discovered by _______

Answer

Answer: Chadwick

---

Question 22.
The neutral particle in the nucleus of an atom is ________

Answer

Answer: neutron

---

Question 23.
Atomic number of sodium is _________

Answer

Answer: 11

---

Question 24.
The mass of an electron is about _________ times, the mass of a hydrogen atom.

Answer

Answer: \(\frac{1}{2000}\)

---

True/False.

Question 25.
Sir J.J. Thomson discovered the anode rays.

Answer

Answer: False

---

Question 26.
According to Rutherford, the positive charge of an atom is concentrated in its center.

Answer

Answer: True

---

Question 27.
Elements are defined by the number of protons they possess.

Answer

Answer: True

---

Question 28.
Valency is the combining capacity of an atom.

Answer

Answer: True

---

Question 29.
α-particles have a mass of 2u.

Answer

Answer: False

---

Question 30.
The mass of electrons is considered to be negligible and its charge is plus one.

Answer

Answer: False

---

Question 31.
According to Thomson, an atom consists of a positively charged sphere and the electrons are embedded in it.

Answer

Answer: True

---

Question 32.
The negative and positive charges are equal in magnitude. So, the atom as a whole is electrically neutral.

Answer

Answer: True

---

Match the Column.

Question 33.

A	B
1. Discovery of Proton	(i) Deuterium
2. Hydrogen	(ii) 4
3. Valency of Magnesium	(iii) Positive charge
4. Valency of Carbon	(iv) He
5. Symbol of Helium	(v) H
6. Symbol of Hydrogen	(vi) 2
7. Electron	(vii) E. Goldstein
8. Proton	(viii) Negative charge

Answer

Answer:

A	B
1. Discovery of Proton	(vii) E. Goldstein
2. Hydrogen	(i) Deuterium
3. Valency of Magnesium	(vi) 2
4. Valency of Carbon	(ii) 4
5. Symbol of Helium	(iv) He
6. Symbol of Hydrogen	(v) H
7. Electron	(viii) Negative charge
8. Proton	(iii) Positive charge

---

Answer in Word/Sentence.

Question 34.
What is the value of charge on a proton?

Answer

Answer: 1.6 × 10^-19 coulomb positive charge

---

Question 35.
What is the value of charge on an electron?

Answer

Answer: 1.6 × 10^-19 coulomb negative charge

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Question 36.
What is the value of charge on a neutron?

Answer

Answer: Zero (0) or no charge

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Question 37.
According to Neils Bohr, electrons can revolve only in certain orbits. What name was given by him to these certain orbits?

Answer

Answer: Discrete orbits of electrons

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Question 38.
According to Bohr-Burry rules, which formula is used to express the maximum number of electrons in an orbit of an atom?

Answer

Answer: 2n²

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Question 39.
What is the maximum number of electrons in the outermost shell, according to Bohr-Burry?

Answer

Answer: 8

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