MCQ Questions for Class 7 Science with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Physical and Chemical Changes Class 7 MCQs Questions with Answers and assess their preparation level.<\/p>\nPhysical and Chemical Changes Class 7 MCQs Questions with Answers<\/h2>\n
Solving the Physical and Chemical Changes Multiple Choice Questions of Class 7 Science Chapter 6 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Physical and Chemical Changes Class 7 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 6 Science Class 7 and cross-check your answers during preparation.<\/p>\n
Question 1.
\nNeutralisation is a:
\n(a) physical change
\n(b) chemical change
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(b) chemical change
\nNeutralisation is a chemical change.<\/p>\n<\/details>\n
\nQuestion 2.
\nRusting can be prevented by:
\n(a) preventing iron from coming in contact with air and moisture by applying greese or paint
\n(b) deposit a layer of a metal like chromium or zinc on iron
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) both (a) and (b)
\nRusting can be prevented by applying grease or paint and by depositing a layer of zinc.<\/p>\n<\/details>\n
\nQuestion 3.
\nThe process of forming substances in their pure state from their solution is known as:
\n(a) galvanisation
\n(b) neutralisation
\n(c) crystallisation
\n(d) all of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) crystallisation
\nThe process of forming substances in their pure state from the solution is called crytalisation.<\/p>\n<\/details>\n
\nQuestion 4.
\nThe process of depositing a layer of zinc on iron is called:
\n(a) galvanisation
\n(b) neutralisation
\n(c) crystallisation
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(a) galvanisation
\nThe process of depositing a layer of zine on iron is called galvanisation.<\/p>\n<\/details>\n
\nQuestion 5.
\nShips suffer a lot of damage from rusting inspite of being painted because:
\n(a) sea water contains many salts
\n(b) sea water is bitter
\n(c) sea water is sour
\n(d) sea water is sweet<\/p>\n\nAnswer<\/span><\/summary>\n(a) sea water contains many salts
\nShip suffers a lot of damage due to the sea water which contains many salts.<\/p>\n<\/details>\n
\nQuestion 6.
\nFood items when kept carefully get spoiled is a:
\n(a) chemical change
\n(b) physical change
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(a) chemical change
\nWhen food items get spoiled by keeping carelessly, is a chemical change.<\/p>\n<\/details>\n
\nQuestion 7.
\nWhen you leave a piece of iron in the open for some time, it acquires a film of brownish substance. The substance is called:
\n(a) acid
\n(b) base
\n(c) rust
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) rust
\nWhen a film of brownish substance acquire on iron piece is called rust.<\/p>\n<\/details>\n
\nQuestion 8.
\nBurning the magnesium ribbon is a:
\n(a) physical change
\n(b) chemical change
\n(c) rusting
\n(d) all of these<\/p>\n\nAnswer<\/span><\/summary>\n(b) chemical change
\nBurning of magnesium ribbon is a chemical change.<\/p>\n<\/details>\n
\nQuestion 9.
\nThe gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change-A) then it burns (Change-B). The following statements pertain to these changes. ChooSe the correct one.
\n(a) Process-A is a chemical change
\n(b) Process-B is-a chemical change
\n(c) Both proceses A and B are chemical changes.
\n(d) None of these processes are . chemical changes<\/p>\n\nAnswer<\/span><\/summary>\n(b) Process-B is-a chemical change
\nProcess-B is a chemical change as when gas burns, it is always a chemical change.<\/p>\n<\/details>\n
\nQuestion 10.
\nWhich of the following is a reversible change ?
\n(a) Rusting
\n(b) Chemical
\n(c) Physical
\n(d) All of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) Physical
\nPhysical change is reversible.<\/p>\n<\/details>\n
\nQuestion 11.
\nAnaerobic bacteria digests animal waste and produces biogas (Change-A). The biogas is then burnt as fuel (Change-B). The following statements pertain to these changes. Choose the correct one.
\n(a) Process-A is a chemical change
\n(b) Process-B is a chemical change
\n(c) Both processes A and B are .chemical changes
\n(d) None of these processes are chemical changes<\/p>\n\nAnswer<\/span><\/summary>\n(c) Both processes A and B are .chemical changes
\nBoth Changes-A and B are chemical changes as producing biogas and burning as fuel is chemical change.<\/p>\n<\/details>\n
\nQuestion 12.
\nWhich of the following is an irreversible change ?
\n(a) Physical
\n(b) Rusting
\n(c) Chemical
\n(d) None of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) Chemical
\nChemical change is irreversible change.<\/p>\n<\/details>\n
\nQuestion 13.
\nThe chemical name of baking soda is:
\n(a) hydrogen carbonate
\n(b) calcium carbonate
\n(c) sodium hydrogen carbonate
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) sodium hydrogen carbonate
\nThe chemical name of baking soda is sodium hydrogen carbonates.<\/p>\n<\/details>\n
\nQuestion 14.
\nCondensation of steam is not a:
\n(a) chemical change
\n(b) physical change
\n(c) rusting
\n(d) both (a) and (c)<\/p>\n\nAnswer<\/span><\/summary>\n(d) both (a) and (c)
\nCondensation of steam in not chemical change and rusting.<\/p>\n<\/details>\n
\nQuestion 15.
\nBeating the alluminium in the boil is a:
\n(a) chemical change
\n(b) rusting
\n(c) physical change
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) physical change
\nBeating the alluminium into the foil is physical change.<\/p>\n<\/details>\n
\nQuestion 16.
\nWhen baking soda is mixed with lemon juice, bubbles are formed with evolution of a gas. A new substance carbon dioxide gas is formed, is a:
\n(a) physical change
\n(b) crystallisation
\n(c) galvanisation
\n(d) chemical change<\/p>\n\nAnswer<\/span><\/summary>\n(a) physical change
\nWhen baking soda is mixed with lemon juice, bubbles are formed is a chemical change.<\/p>\n<\/details>\n
\nQuestion 17.
\nBlooming of flower is a:
\n(a) chemical change
\n(b) physical change
\n(c) rusting
\n(d) galvanisation<\/p>\n\nAnswer<\/span><\/summary>\n(a) chemical change
\nBlooming of flower is a chemical change.<\/p>\n<\/details>\n
\nQuestion 18.
\nA change that affects iron articles and slowly destroys them is:
\n(a) Rusting
\n(b) Galvanisation
\n(c) Chemical change
\n(d) Crystallisation<\/p>\n\nAnswer<\/span><\/summary>\n(a) Rusting
\nA change that affect iron articles and destroys them is rusting.<\/p>\n<\/details>\n
\nQuestion 19.
\nPhotosynthesis is a:
\n(a) chemical change
\n(b) physical change
\n(c) rusting
\n(d) crystallisation<\/p>\n\nAnswer<\/span><\/summary>\n(a) chemical change
\nPhotosynthesis is a chemical change.<\/p>\n<\/details>\n
\nQuestion 20.
\nStainless steel, which doesn\u2019t rust, is made by mixing iron with carbon and metals like:
\n(a) chromium
\n(b) nickel
\n(c) manganese
\n(d) all of these<\/p>\n\nAnswer<\/span><\/summary>\n(d) all of these
\nAll metals like chromium, nickel and manganese are mixed with iron and carbon.<\/p>\n<\/details>\n
\nQuestion 21.
\nRusting of iron objects is faster in:
\n(a) deserts
\n(b) coastal areas
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(b) coastal areas
\nRusting of iron object is faster in coastal areas because the presence of moisture, is higher.<\/p>\n<\/details>\n
\nQuestion 22.
\nLighting of torch bulb using dry cell is:
\n(a) Chemical change
\n(b) Physical change
\n(c) Physical and chemical changes
\n(d) None of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) Physical and chemical changes
\nLighting of torch using dry cells is a physical and chemical change.<\/p>\n<\/details>\n
\nQuestion 23.
\nWhich of the following is not a chemical change ?
\n(a) Digestion of food
\n(b) Formation of milk
\n(c) Burning of coal
\n(d) Melting of ice<\/p>\n\nAnswer<\/span><\/summary>\n(d) Melting of ice
\nMelting of ice is a chemical change.<\/p>\n<\/details>\n
\nQuestion 24.
\nWhich of the following is true for physical change ?
\n(a) No new substances are formed
\n(b) New substances are formed
\n(c) Sometimes new substances are formed
\n(d) None of these<\/p>\n\nAnswer<\/span><\/summary>\n(a) No new substances are formed
\nNo new substance is formed is the true statement.<\/p>\n<\/details>\n
\nQuestion 25.
\nIn a chemical change:
\n(a) Gas may be formed
\n(b) Heat may be given off or absorbed
\n(c) Sound may be produced
\n(d) All of these<\/p>\n\nAnswer<\/span><\/summary>\n(d) All of these
\nIn chemical changes all heat, gas and sound may be produced.<\/p>\n<\/details>\n
\nQuestion 26.
\nFor rusting:
\n(a) Only moisture is required
\n(b) Only air is required
\n(c) Both air and moistured are required
\n(d) None of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) Both air and moistured are required
\nFor rusting both air and moisture are required.<\/p>\n<\/details>\n
\nQuestion 27.
\nWhen carbon dioxide is passed through lime water, it turns milky due to the formation:
\n(a) calcium oxide
\n(b) calcium carbonate
\n(c) magnesium carbonate
\n(d) magnesium oxide<\/p>\n\nAnswer<\/span><\/summary>\n(b) calcium carbonate
\nWhen carbofi dioxide is passed through lime water it turns milky due to calcium carbonate<\/p>\n<\/details>\n
\nQuestion 28.
\nWhen a candle burns, then first the wax melts. Melting of wax is :
\n(a) physical change
\n(b) chemical change
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(a) physical change
\nMelting of wax is a physical change because it doesn\u2019t change in its properties<\/p>\n<\/details>\n
\nQuestion 29.
\nWhen wax vapours burns then smoke and carbon dioxide are formed which are new substances, is a:
\n(a) physical change
\n(b) chemical change
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(b) chemical change
\nWhen wax vapours burn, gas is produced, it is a chemical change.<\/p>\n<\/details>\n
\nQuestion 30.
\nCurd can not be converted into milk again so it is a:
\n(a) chemical change
\n(b) physical change
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(a) chemical change
\nAs curd cannot become milk again, so it is a chemical change.<\/p>\n<\/details>\n
\nQuestion 31.
\nBurning of wood is a:
\n(a) physical change
\n(b) chemical change
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(b) chemical change
\nBurning of wood is a chemical change because it produces many gases.<\/p>\n<\/details>\n
\nQuestion 32.
\nProperties such as shape, size, colour and state of substances are called:
\n(a) chemical properties
\n(b) physical properties
\n(c) physical change
\n(d) chemical change<\/p>\n\nAnswer<\/span><\/summary>\n(b) physical properties
\nProperties such as shape, size, colour and state of substance are called physical changes.<\/p>\n<\/details>\n
\nQuestion 33.
\nA change in which one or more new substances are formed is called:
\n(a) physical change
\n(b) chemical change
\n(c) chemical properties
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(b) chemical change
\nA change in which one or more new substance is formed is called chemical change.<\/p>\n<\/details>\n
\nQuestion 34.
\nA change in which no new substance is formed is called:
\n(a) physical change
\n(b) chemical change
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(a) physical change
\nA change in which no new substance is formed is called physical change.<\/p>\n<\/details>\n
\nQuestion 35.
\nDuring a chemical change:
\n(a) one or more new substances are produced
\n(b) a colour change may take place
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(c) both (a) and (b)
\nDuring chemical change one or more new substance and colour change may take place.<\/p>\n<\/details>\n
\nQuestion 36.
\nFew example of chemical changes are:
\n(a) burning of coal
\n(b) food getting spoiled
\n(c) formation of curd
\n(d) all of these<\/p>\n\nAnswer<\/span><\/summary>\n(d) all of these
\nAll burning of coal, food getting spoiled and formation of curd are examples of chemical change.<\/p>\n<\/details>\n
\nQuestion 37.
\nAn example of physical change is:
\n(a) melting of ice
\n(b) a gas may be formed
\n(c) both (a) and (b)
\n(d) none of these<\/p>\n\nAnswer<\/span><\/summary>\n(a) melting of ice
\nMelting of ice is an example of physical change.<\/p>\n<\/details>\n
\nMatch Column A with Column B:<\/span><\/p>\nQuestion 1.<\/p>\n
\n\n\nColumn- A<\/strong><\/td>\nColumn- B<\/strong><\/td>\n<\/tr>\n\n(a) Dissolving sugar in water<\/td>\n | (i) chemical change<\/td>\n<\/tr>\n | \n(b) Burning of coal<\/td>\n | (ii) physical change<\/td>\n<\/tr>\n | \n(c) Melting of wax<\/td>\n | (iii) chemical change<\/td>\n<\/tr>\n | \n(d) Photosynthesis<\/td>\n | (iv) physical change<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\nAnswer<\/span><\/summary>\n\n\n\nColumn- A<\/strong><\/td>\nColumn- B<\/strong><\/td>\n<\/tr>\n\n(a) Dissolving sugar in water<\/td>\n | (iii) chemical change , (iv) physical change<\/td>\n<\/tr>\n | \n(b) Burning of coal<\/td>\n | (i) chemical change , (iii) chemical change<\/td>\n<\/tr>\n | \n(c) Melting of wax<\/td>\n | (iii) chemical change , (ii) physical change<\/td>\n<\/tr>\n | \n(d) Photosynthesis<\/td>\n | (i) chemical change \u00a0, (iii) chemical change<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n \nQuestion 2.<\/p>\n \n\n\nColumn- A<\/strong><\/td>\nColumn- B<\/strong><\/td>\n<\/tr>\n\n(a) No new substance is formed<\/td>\n | (i) galvanisation<\/td>\n<\/tr>\n | \n(b) One or more new substance are formed<\/td>\n | (ii) rusting<\/td>\n<\/tr>\n | \n(c) Affects the iron articles<\/td>\n | (iii) physical change<\/td>\n<\/tr>\n | \n(d) A layer of zinc on iron<\/td>\n | (iv) chemical change<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\nAnswer<\/span><\/summary>\n\n\n\nColumn- A<\/strong><\/td>\nColumn- B<\/strong><\/td>\n<\/tr>\n\n(a) No new substance is formed<\/td>\n | (iii) physical change<\/td>\n<\/tr>\n | \n(b) One or more new substance are formed<\/td>\n | (iv) chemical change<\/td>\n<\/tr>\n | \n(c) Affects the iron articles<\/td>\n | (ii) rusting<\/td>\n<\/tr>\n | \n(d) A layer of zinc on iron<\/td>\n | (i) galvanisation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n \nQuestion 3.<\/p>\n \n\n\nColumn- A<\/strong><\/td>\nColumn- B<\/strong><\/td>\n<\/tr>\n\n(a) Chemical name of baking soda<\/td>\n | (i) coastal areas<\/td>\n<\/tr>\n | \n(b) Rusting can be prevented by<\/td>\n | (ii) chemical changes<\/td>\n<\/tr>\n | \n(c) A gas may be formed<\/td>\n | (iii) galvanisation<\/td>\n<\/tr>\n | \n(d) Rusting is faster in<\/td>\n | (iv) sodium hydrogen carbonate<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\nAnswer<\/span><\/summary>\n\n\n\nColumn- A<\/strong><\/td>\nColumn- B<\/strong><\/td>\n<\/tr>\n\n(a) Chemical name of baking soda<\/td>\n | (iv) sodium hydrogen carbonate<\/td>\n<\/tr>\n | \n(b) Rusting can be prevented by<\/td>\n | (iii) galvanisation<\/td>\n<\/tr>\n | \n(c) A gas may be formed<\/td>\n | (ii) chemical changes<\/td>\n<\/tr>\n | \n(d) Rusting is faster in<\/td>\n | (i) coastal areas<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n \nState whether the following statements are \u2018True\u2019 or \u2018False\u2019:<\/span><\/p>\nQuestion 1. \nNew substances are formed in a chemical change.<\/p>\n\nAnswer<\/span><\/summary>\nTrue<\/p>\n<\/details>\n \nQuestion 2. \nThe chemical properties of a substance are its shape, size, colour and state.<\/p>\n\nAnswer<\/span><\/summary>\nFalse<\/p>\n<\/details>\n \nQuestion 3. \nSound produced is a physical change.<\/p>\n\nAnswer<\/span><\/summary>\nFalse<\/p>\n<\/details>\n \nQuestion 4. \nPhysical change is a temporary change.<\/p>\n\nAnswer<\/span><\/summary>\nTrue<\/p>\n<\/details>\n \nQuestion 5. \nNeutralisation is a physical change.<\/p>\n\nAnswer<\/span><\/summary>\nFalse<\/p>\n<\/details>\n \nQuestion 6. \nThe water of sea contains many salts.<\/p>\n\nAnswer<\/span><\/summary>\nTrue<\/p>\n<\/details>\n \nQuestion 7. \nChemical changes is irreversible.<\/p>\n\nAnswer<\/span><\/summary>\nTrue<\/p>\n<\/details>\n \nQuestion 8. \nChanging of day and night is a chemical change.<\/p>\n\nAnswer<\/span><\/summary>\nFalse<\/p>\n<\/details>\n \nQuestion 9. \nCutting a log of wood into pieces is a physical change.<\/p>\n\nAnswer<\/span><\/summary>\nFalse<\/p>\n<\/details>\n \nQuestion 10. \nFormation of manure from leaves is a physical change.<\/p>\n\n | | | | | | | | | | | | | | | | | |