MCQ Questions for Class 7 Science Chapter 6 : NCERT solutions for Class 7 Science MCQs Chapter 6 “Physical and Chemical Changes” with Answers PDF Free Download prepared here according to the latest CBSE syllabus and NCERT curriculum. Class 7 Science MCQs Multiple Choice Questions for all Chapter.

MCQ Questions for Class 7 Science Chapter 6 Physical and Chemical Changes with answer
Q1. Formation of a compound is
(a) Temporary change
(b) Physical change
(c) Chemical change
(d) Reversible change
Answer: (c) Chemical change
Q2. In which type of change a new substance is formed?
(a) In physical change
(b) In chemical change
(c) In both (a) and (b)
(d) In neither of these
Answer: (c) Chemical change
Q3. Neutralisation is a:
(a) physical change
(b) chemical change
(c) both (a) and (b)
(d) none of these
Answer: (b) chemical change
Q4. When magnesium is burnt, heat and light are produced. The burning of magnesium is a:
(a) reversible change
(b) physical change
(c) chemical and exothermic change
(d) chemical and endothermic change
Answer: (c) chemical and exothermic change
Q5. Which among the following is a physical change?
(a) Cutting a log of wood in small pieces
(b) Burning of wood
(c) Ripening of fruit
(d) Cooking of food
Answer: (a) Cutting a log of wood in small pieces
Q6. Rusting can be prevented by:
(a) preventing iron from coming in contact with air and moisture by applying greese or paint
(b) deposit a layer of a metal like chromium or zinc on iron
(c) both (a) and (b)
(d) none of these
Answer: (c) both (a) and (b)
Q7. Which of the following is an example of physical change?
(a) A bud turning into a flower
(b) Rusting of iron
(c) Boiling of water
(d) Ripening of a tomato
Answer: (c) Boiling of water
Q8. Which of the following is a chemical change?
(a) Bursting of a fire cracker
(b) Germination of seed
(c) Coal formation from buried trees
(d) All of these
Answer: (d) All of these
Q9. The process of forming substances in their pure state from their solution is known as:
(a) galvanisation
(b) neutralisation
(c) crystallisation
(d) all of these
Answer: (c) crystallisation
Q10. A change in which the original substance can be obtained back by change of conditions is called:
(a) reversible change
(b) physical change
(c) chemical change
(d) Both (a) and (b)
Answer: (d) Both (a) and (b)
Q11. Which is a method to prevent rust?
(a) Crystallization
(b) Sedimentation
(c) Galvanisation
(d) None of these
Answer: (c) Galvanisation
Q12. The process of depositing a layer of zinc on iron is called:
(a) galvanisation
(b) neutralisation
(c) crystallisation
(d) none of these
Answer: (a) galvanisation
Q13. Which of the following is a chemical change?
(a) Dissolving of common salt into water
(b) Changing of water into ice
(c) Melting of ice
(d) Rusting of iron
Answer: (d) Rusting of iron
Q14. How crystal of pure substances are obtained?
(a) By crystallization
(b) By chromatography
(c) By peptization
(d) By all these methods
Answer: (a) By crystallization
Q15. Ships suffer a lot of damage from rusting inspite of being painted because:
(a) sea water contains many salts
(b) sea water is bitter
(c) sea water is sour
(d) sea water is sweet
Answer: (a) sea water contains many salts
Q16. Hydrochloric acid is added to a beaker containing a piece of zinc. Zinc chloride is formed and hydrogen gas is released. This is an example of:
(a) a chemical reaction
(b) a physical change
(c) Crystallization
(d) None of these
Answer: (a) a chemical reaction
Q17. What is the formula of rust?
(a) Fe2O3
(b) Fe3O4
(c) FeO
(d) None of these
Answer: (a) Fe2O3
Q18. Food items when kept carefully get spoiled is a:
(a) chemical change
(b) physical change
(c) both (a) and (b)
(d) none of these
Answer: (a) chemical change
Q19. Which of the following changes is accompanied by sound?
(a) Photosynthesis
(b) Spoilage of food
(c) Explosion of fire works
(d) None of these
Answer: (c) Explosion of fire works
Q20. What will happen if carbon dioxide gas is passed through lime water ?
(a) Calcium carbonate is formed
(b) The lime water turns milky
(c) Both of these
(d) None of these
Answer: (c) Both of these