{"id":11276,"date":"2022-05-21T09:00:41","date_gmt":"2022-05-21T03:30:41","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=11276"},"modified":"2022-05-13T11:13:40","modified_gmt":"2022-05-13T05:43:40","slug":"mcq-questions-for-class-8-science-chapter-14","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/mcq-questions-for-class-8-science-chapter-14\/","title":{"rendered":"MCQ Questions for Class 8 Science Chapter 14 Chemical Effects of Electric Current"},"content":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 8 Science Chapter 14 Chemical Effects of Electric Current with Answers Pdf free download is available here. MCQ Questions for Class 8 Science with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Chemical Effects of Electric Current Class 8 MCQs Questions with Answers and assess their preparation level.<\/p>\n

Chemical Effects of Electric Current Class 8 MCQs Questions with Answers<\/h2>\n

Solving the Chemical Effects of Electric Current Multiple Choice Questions of Class 8 Science Chapter 14 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Chemical Effects of Electric Current Class 8 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 14 Science Class 8 and cross-check your answers during preparation.<\/p>\n

Question 1.
\nThe negative charged ions are called:
\n(a) cations
\n(b) anions
\n(c) ions
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) cations
\nAnions are negative charged ions.<\/p>\n<\/details>\n

\n

Question 2.
\nKerosene is:
\n(a) electrolyte
\n(b) non-electrolyte
\n(c) electrode
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) electrolyte
\nKerosene is non-electrolyte.<\/p>\n<\/details>\n

\n

Question 3.
\nMagnetic compass connected In a circuit is used to check:
\n(a) magnetism in electric current
\n(b) slow current
\n(c) small current
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) small current
\nMagnetic compass connected in a circuit is used to check small current.<\/p>\n<\/details>\n

\n

Question 4.
\nLED glows:
\n(a) when a strong electric current flows through it
\n(b) whenever a weak electric current flows through it
\n(c) when no electric current flows through it
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(b) whenever a weak electric current flows through it
\nLED glows when even a weak electric current flows through it.<\/p>\n<\/details>\n

\n

Question 5.
\nWhich of the following is a good conductor of electricity:
\n(a) istilled water
\n(b) tap water
\n(c) kerosene
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(b) tap water
\nTap water is a good conductor of electricity.<\/p>\n<\/details>\n

\n

Question 6.
\nWhen current flows through a conducting solution than the electrode connected to the negati\u2019wc terminal of the battery is called :
\n(a) anode
\n(b) cathode
\n(c) rod
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(b) cathode
\nCathode is the electrode connected to the negative terminal of the battery.<\/p>\n<\/details>\n

(a) anode
\n(b) cathode
\n(c) rod
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) anode
\nAnode is the electrode connected to the positive terminal of the battery.<\/p>\n<\/details>\n

\n

Question 7.
\nCurrent is the flow of:
\n(a) electrons
\n(b) protons
\n(c) neutrons
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) electrons
\nCurrent is the flow of electrons.<\/p>\n<\/details>\n

\n

Question 8.
\nA battery is used to:
\n(a) convert chemical current into electric
\n(b) maintain a potential difference current
\n(c) measure the current
\n(d) measure the temperature<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) convert chemical current into electric
\nA battery is used to convert chemical current into electric current.<\/p>\n<\/details>\n

\n

Question 9.
\nWhen electric current is passed through the copper sulphate solution, copper sulphate dissociates into:
\n(a) copper and sulphur
\n(b) copper and oxygen
\n(c) copper and sulphate
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) copper and sulphate
\nOn passing electric current through the copper sulphate solution, copper sulphate dissociates into copper and sulphate.<\/p>\n<\/details>\n

\n

Question 10.
\nThe cans, used for storing food, are made by electroplating ……………. on to irons
\n(a) chromium
\n(b) zinc
\n(c) tin
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) tin
\nThe cans, used for storing food, are made by electroplating tin onto iron.<\/p>\n<\/details>\n

\n

Question 11.
\n……………….. is deposited on Iron used in bridges and automobiles to protect it from corrosion and formation of rust.
\n(a) Chromium
\n(b) Zinc
\n(c) lin
\n(d) None of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(b) Zinc
\nZinc is deposited on iron used in bridges and automobiles.<\/p>\n<\/details>\n

\n

Question 12.
\nCar parts, bath taps, kitchen gas burners, bicycle handlebars arc electroplated with:
\n(a) chromium
\n(b) zinc
\n(c) tin
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) chromium
\nCarparks, bath taps, kitchen gas burners, bicycle handle bars are electroplated<\/p>\n<\/details>\n

\n

Question 13.
\nA tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid. A white it glows very dimly for liquid H. You would conclude that:
\n(a) liquid A is a better conductor than liquid B
\n(b) liquid B is a better conductor than liquid A
\n(c) both liquids are equally conducting
\n(d) conducting properties of liquid cannot be compared in this manner<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) liquid A is a better conductor than liquid B
\nLiquid A is a better conductor than liquid B.<\/p>\n<\/details>\n

\n

Question 14.
\nWhich one is the conductor
\n(a) brass
\n(b) plastic
\n(c) mica
\n(d) leather<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) brass
\nBrass is the conductor, plastic, mica and leather are insulators.<\/p>\n<\/details>\n

\n

Question 15.
\nThe process in which a chemical change takes place in a substance, when electric current is passed through it is called:
\n(a) electrolysis
\n(b) electrodes
\n(c) thermal conduction
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) electrolysis
\nThe process in which chemical change takes place in a substance when electric current is passed through it is called electrolysis.<\/p>\n<\/details>\n

\n

Question 16.
\nElectroplating is a process which is:
\n(a) magnetic effect of electricity
\n(b) heating effect of electricity
\n(c) chemical effect off electricity
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) chemical effect off electricity
\nElectroplating is a process which is chemical effect of electricity.<\/p>\n<\/details>\n

\n

Question 17.
\nWhich of the fallowing liquid is poor conductor:
\n(a) salty water
\n(b) orange juice
\n(c) lemon juice
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) salty water
\nSalty water, orange juice and lemon juice, all are good conductors.<\/p>\n<\/details>\n

\n

Question 18.
\nThe substance which is conductor of electricity is:
\n(a) rubber
\n(b) paper
\n(c) nails
\n(d) plastic<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) nails
\nNails (iron) is conductor of electricity, whereas member, paper and plastic are poor conductor<\/p>\n<\/details>\n

\n

Question 19.
\nWe use magnetic needle to find the effect of:
\n(a) slow electric current
\n(b) small electric current
\n(c) magnetism
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(b) small electric current
\nMagnetic needle is used to find the effect of small electric current.<\/p>\n<\/details>\n

\n

Question 20.
\nIf a switch has some sparking, we will switch it off with the help of:
\n(a) an iron nail
\n(b) cotton cloth
\n(c) wooden stick
\n(d) any of (b) and (c)<\/p>\n

\nAnswer<\/span><\/summary>\n

(d) any of (b) and (c)
\nCotton cloth or wooden stick can be used to switch off the switch if it has some parking<\/p>\n<\/details>\n

\n

Question 21.
\nDuring electroplating in CuSO4<\/sub>, (Copper sulphate) solution …………………. will get deposit on electrode at negative terminal.
\n(a) Copper from positive electrode
\n(b) Sulphur
\n(c) Copper from CuSO4<\/sub>, solution
\n(d) None of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) Copper from CuSO4<\/sub>, solution
\nDuring electroplating in CuSO4<\/sub> (copper sulphate) solution copper from CuSO4 solution will get deposited on electrode at negative terminal.<\/p>\n<\/details>\n

\n

Question 22.
\nElectroplating is a method of:
\n(a) making plates
\n(b) coating a metal on another metal using electric current
\n(c) making plates which use electricity
\n(d) making a metal with another metal<\/p>\n

\nAnswer<\/span><\/summary>\n

(b) coating a metal on another metal using electric current
\nElectroplating is a method of coating a metal on another metal using electric current.<\/p>\n<\/details>\n

\n

Question 23.
\nWhich one of the following is the insulator:
\n(a) human body
\n(b) paper
\n(c) acid
\n(d) steel<\/p>\n

\nAnswer<\/span><\/summary>\n

(b) paper
\nPaper is insulator whereas human body, acid and steel are conductors.<\/p>\n<\/details>\n

\n

Question 24.
\nWhich liquid do not conduct electricity?
\n(a) common salt solution
\n(b) acidic solution
\n(c) distilled water
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) distilled water
\nDistilled water do not, conduct electricity. Common salt solution and acidic solution conduct electricity.<\/p>\n<\/details>\n

\n

Question 25.
\nAn electrolyte is:
\n(a) a metal
\n(b) a solution
\n(c) a liquid that conducts electricity
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(c) a liquid that conducts electricity
\nAn electrolyte is a liquid that conducts electricity.<\/p>\n<\/details>\n

\n

Question 26.
\nAdding lime water to tap water makes it:
\n(a) an electrolyte
\n(b) electrolysis
\n(c) no change occur
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) an electrolyte
\nAdding lime water to tap water makes it an electrolyte.<\/p>\n<\/details>\n

\n

Question 27.
\nThe positive charged ions are called:
\n(a) cations
\n(b) anions
\n(c) ions
\n(d) none of these<\/p>\n

\nAnswer<\/span><\/summary>\n

(a) cations
\nCations are positive charged ions.<\/p>\n<\/details>\n

\n

Match the Column-A with Column-B:<\/span><\/p>\n

Question 1.<\/p>\n\n\n\n\n\n\n\n
Column-A<\/strong><\/td>\nColumn-B<\/strong><\/td>\n<\/tr>\n
(a) Copper allows electric current to pass through it easily<\/td>\n(i) copper<\/td>\n<\/tr>\n
(b) Adding some salt in distilled water makes it<\/td>\n(ii) because they are insulators<\/td>\n<\/tr>\n
(c) Plastics are used to make handles of electric appliances<\/td>\n(iii) a conductor<\/td>\n<\/tr>\n
(d) It is used to make electric wires<\/td>\n(iv) a conductor<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nAnswer<\/span><\/summary>\n\n\n\n\n\n\n\n
Column-A<\/strong><\/td>\nColumn-B<\/strong><\/td>\n<\/tr>\n
(a) Copper allows electric current to pass through it easily<\/td>\n(iv) a conductor<\/td>\n<\/tr>\n
(b) Adding some salt in distilled water makes it<\/td>\n(iii) a conductor<\/td>\n<\/tr>\n
(c) Plastics are used to make handles of electric appliances<\/td>\n(ii) because they are insulators<\/td>\n<\/tr>\n
(d) It is used to make electric wires<\/td>\n(i) copper<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n
\n

Question 2.<\/p>\n\n\n\n\n\n\n\n
Column-A<\/strong><\/td>\nColumn-B<\/strong><\/td>\n<\/tr>\n
(a) Path through which electric current passes<\/td>\n(i) confirms the flow of current<\/td>\n<\/tr>\n
(b) The filament of the bulb glows<\/td>\n(ii) electroplating<\/td>\n<\/tr>\n
(c) Deflection in magnetic compass<\/td>\n(iii) electric circuit.<\/td>\n<\/tr>\n
(d) Coating of silver and gold on jewellery made from less expensive metals<\/td>\n(iv) due to heating effect of electrical circuit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nAnswer<\/span><\/summary>\n\n\n\n\n\n\n\n
Column-A<\/strong><\/td>\nColumn-B<\/strong><\/td>\n<\/tr>\n
(a) Path through which electric current passes<\/td>\n(iii) electric circuit<\/td>\n<\/tr>\n
(b) The filament of the bulb glows<\/td>\n(iv) due to heating effect of electrical circuit<\/td>\n<\/tr>\n
(c) Deflection in magnetic compass<\/td>\n(i) confirms the flow of current<\/td>\n<\/tr>\n
(d) Coating of silver and gold on jewellery made from less expensive metals<\/td>\n(ii) electroplating<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n
\n

Question 3.<\/p>\n\n\n\n\n\n\n\n
Column-A<\/strong><\/td>\nColumn-B<\/strong><\/td>\n<\/tr>\n
(a) Positive ion<\/td>\n(i) Insulator<\/td>\n<\/tr>\n
(b) Negative ion<\/td>\n(ii) Conductor<\/td>\n<\/tr>\n
(c) Tap water<\/td>\n(iii) Cations<\/td>\n<\/tr>\n
(d) Wood<\/td>\n(iv) Anions<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nAnswer<\/span><\/summary>\n\n\n\n\n\n\n\n
Column-A<\/strong><\/td>\nColumn-B<\/strong><\/td>\n<\/tr>\n
(a) Positive ion<\/td>\n(iii) Cations<\/td>\n<\/tr>\n
(b) Negative ion<\/td>\n(iv) Anions<\/td>\n<\/tr>\n
(c) Tap water<\/td>\n(ii) Conductor<\/td>\n<\/tr>\n
(d) Wood<\/td>\n(i) Insulator<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n
\n

State whether the following statements are True or False:<\/span><\/p>\n

Question 1.
\nPure water is good conductor of electricity.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 2.
\nBodies of human beings and animals are insulators of electricity.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 3.
\nElectroplating of nickel and chromium on clean iron surface is done by employing the heating effect of current.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 4.
\nDistilled water is an insulator.<\/p>\n

\nAnswer<\/span><\/summary>\n

True<\/p>\n<\/details>\n

\n

Question 5.
\nElectrolyte is a substance which produces ions in a solution.<\/p>\n

\nAnswer<\/span><\/summary>\n

True<\/p>\n<\/details>\n

\n

Question 6.
\nAnode is the electrode which is connected to the negative terminal of the battery.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 7.
\nKerosene is an electrolyte.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 8.
\nLeather is a good conductor of electricity.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 9.
\nAddition of sodium hydroxide in distilled water makes it non-electrolyte.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 10.
\nOn passing current in water, bubbles of oxygen are formed on the electrode connected to the positive terminal of the battery.<\/p>\n

\nAnswer<\/span><\/summary>\n

True<\/p>\n<\/details>\n

\n

Question 11.
\nPetrol is agood conductor of electricity.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 12.
\nAll vegetable oils are non-electrolytes.<\/p>\n

\nAnswer<\/span><\/summary>\n

True<\/p>\n<\/details>\n

\n

Question 13.
\nElectroplating is heating effect of electric current.<\/p>\n

\nAnswer<\/span><\/summary>\n

False<\/p>\n<\/details>\n

\n

Question 14.
\nOn passing electric current through the copper sulphate solution, it dissociates into copper and sulphate.<\/p>\n

\nAnswer<\/span><\/summary>\n

True<\/p>\n<\/details>\n

\n

Fill in the blanks:<\/span><\/p>\n

Question 1.
\nAn electric lamp glows due to …………………….. effect of electric current.<\/p>\n

\nAnswer<\/span><\/summary>\n

heating<\/p>\n<\/details>\n

\n

Question 2.
\nMaterials which do not allow an electric current to pass through them are called ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

insulators<\/p>\n<\/details>\n

\n

Question 3.
\nHandles of doors are coated with …………………….. to give them lustre.<\/p>\n

\nAnswer<\/span><\/summary>\n

chromium<\/p>\n<\/details>\n

\n

Question 4.
\nElectrolysis occur when the electrolyte is in the …………………….. state.<\/p>\n

\nAnswer<\/span><\/summary>\n

liquid<\/p>\n<\/details>\n

\n

Question 5.
\nAddition of caustic soda in distilled water makes it an ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

electrolyte<\/p>\n<\/details>\n

\n

Question 6.
\nMost liquids that conduct electricity are solutions of …………………….. and ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

acids, bases and salts<\/p>\n<\/details>\n

\n

Question 7.
\nThe passage of an electric current through a solution causes …………………….. effect.<\/p>\n

\nAnswer<\/span><\/summary>\n

chemical<\/p>\n<\/details>\n

\n

Question 8.
\nIf you pass current through copper sulphate solution, copper gets deposited on the plate connected to the …………………….. terminal of the battery.<\/p>\n

\nAnswer<\/span><\/summary>\n

negative<\/p>\n<\/details>\n

\n

Question 9.
\nThe process of depositing a layer of any desired metal on another metallic object, by means of electricity, is called ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

electroplating<\/p>\n<\/details>\n

\n

Question 10.
\nMaterials which allow an electric current to pass through them are called ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

conductors<\/p>\n<\/details>\n

\n

Question 11.
\nCurrent flows from …………………….. terminal to …………………….. terminal in an electric current.<\/p>\n

\nAnswer<\/span><\/summary>\n

positive to negative<\/p>\n<\/details>\n

\n

Question 12.
\nPath through which an electric current flows is called ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

electric circuit<\/p>\n<\/details>\n

\n

Question 13.
\nThe …………………….. of a bulb glows when current passes through it.<\/p>\n

\nAnswer<\/span><\/summary>\n

filament<\/p>\n<\/details>\n

\n

Question 14.
\nMaterials connected at …………………….. terminal gets electroplated with desired metals.<\/p>\n

\nAnswer<\/span><\/summary>\n

negative<\/p>\n<\/details>\n

\n

Question 15.
\nDeflection in …………………….. shows current is passing.<\/p>\n

\nAnswer<\/span><\/summary>\n

magnetic compass<\/p>\n<\/details>\n

\n

Question 16.
\nA conducting wire carrying current behaves like a ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

magnet<\/p>\n<\/details>\n

\n

Question 17.
\nFlow of negatively charged electrons is called ………………………<\/p>\n

\nAnswer<\/span><\/summary>\n

electric current<\/p>\n<\/details>\n

\n

Question 18.
\nWhen electricity is passed through a liquid, it causes a …………………….. change.<\/p>\n

\nAnswer<\/span><\/summary>\n

chemical<\/p>\n<\/details>\n

\n

Hope the information shared regarding the NCERT MCQ Questions for Class 8 Science Chapter 14 Chemical Effects of Electric Current with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 8 Science Chemical Effects of Electric Current MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 8 Science Chapter 14 Chemical Effects of Electric Current with Answers Pdf free download is available here. MCQ Questions for Class 8 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Chemical Effects of Electric Current Class 8 …<\/p>\n

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