This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 6 Changes Around Us – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 6 Changes Around Us Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The liquid in a thermometer ..... as the temperature increases. A) Expands. B) Disappears. C) Freezes. D) Explodes. Show Answer Correct Answer: A) Expands. 2. In which of the following changes, did the Growing of Hair derives? A) Slow Changes. B) Fast Changes. C) Reversible Changes. D) Irreversible Changes. Show Answer Correct Answer: B) Fast Changes. 3. The changes that take place on their own are called ..... A) Artificial Changes. B) Natural Changes. C) All the above. D) None of the above. Show Answer Correct Answer: B) Natural Changes. 4. WHICH OF THE FOLLOWING CANNOT BE REVERSED? A) RUBBER BAND. B) DOUGH. C) ROTI. D) None of the above. Show Answer Correct Answer: C) ROTI. 5. What are irreversible changes? A) A change that cannot be reversed. B) A change that can be reversed. C) I don't know. D) A change in which no new substance are formed. Show Answer Correct Answer: A) A change that cannot be reversed. 6. Is there a new product formed in irreversible change A) No. B) Yes. C) All the above. D) None of the above. Show Answer Correct Answer: B) Yes. 7. Raw egg to Boiled egg can we reverse the changes?? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 8. Cooking is A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 9. Growth of animals and plants A) Chemcial change. B) Physical change. C) I don't know. D) Reversible change. Show Answer Correct Answer: A) Chemcial change. 10. Which of the following changes takes when some other substance is mixed with the given substance? A) Heating of iron. B) The grinding of wheat into flour. C) Curdling of milk. D) Folding a paper to make a paper boat. Show Answer Correct Answer: C) Curdling of milk. 11. Making of an aeroplane by paper folding is an example of? A) Reversible. B) Irreversible. C) Undisirable. D) Slow. Show Answer Correct Answer: A) Reversible. 12. A girl is making chapati. She did the following steps:Step 1:She added water, salt, and flour to make a dough.Step 2:She used a rolling pin to shape the dough.Which of these options correctly explains the changes? A) Both the steps represent a reversible change. B) Both the steps represent an irreversible change. C) Step 1 is a reversible change and step 2 is an irreversible change. D) Step 2 is a reversible change and step 1 is an irreversible change. Show Answer Correct Answer: D) Step 2 is a reversible change and step 1 is an irreversible change. 13. What type of changes are the blowing of balloon and it's bursting? A) Both the changes are reversible. B) Reversible and irreversible. C) Both the changes are irreversible. D) Irreversible and reversible. Show Answer Correct Answer: B) Reversible and irreversible. 14. Washing soda + lemon juice ..... carbon dioxide + other components. in this chemical reaction washing soda and lemon juice are A) Products. B) Reactants. C) None of these. D) Both products as well as reactants. Show Answer Correct Answer: B) Reactants. 15. In which an object may become different in its shape, size, position and at time, even in its composition known as A) Slow change. B) Change. C) Irreversble change. D) Physical change. Show Answer Correct Answer: B) Change. 16. Which of the following is an example of an irreversible change that takes place when heat is supplied? A) Melting of ice. B) Transformation of water into vapour. C) Burning of coal. D) The expansion of iron. Show Answer Correct Answer: C) Burning of coal. 17. What is a physical change A) It is like a photosynthesis. B) It is the changes in which no new substances are formed. C) It's a cutting of a vegetable. D) None of the above. Show Answer Correct Answer: B) It is the changes in which no new substances are formed. 18. While lighting a candle, Paheli observed the following changes.(i)Wax was melting(ii)Candle was burning(iii)Size of the candle was reducing(iv)Melted wax was getting solidified. of the above, the changes that can be reversed are A) (i) and (ii). B) (ii) and (iii). C) (iii) and (iv). D) (i) and (iv). Show Answer Correct Answer: D) (i) and (iv). 19. Changes may occur- A) Only by mixing a substance with some other substance. B) Only by heating a substance. C) Both by heating a substance and by mixing it with some other. D) None of these options is correct. Show Answer Correct Answer: C) Both by heating a substance and by mixing it with some other. 20. Adding baking soda and vinegar together and it fizzes and creates carbon dioxide. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 21. A small quantity of curd is added to warm milk. The milk is stirred and is set aside undisturbed for a few hours at a warm place. In a few hours, the milk changes into curd. Is this change reversible? A) No, its Irreversible. B) Yes, its reversible. C) I don't know. D) The question is inappropriate. Show Answer Correct Answer: A) No, its Irreversible. 22. If boiling water is poured into thick glass, it often cracks. This is because ..... A) Of the unequal expansion and contraction of the inner and out glass layer. B) The outer glass layer expands more than the inner glass layer when in contact with water. C) The glass is very fragile. D) The difference in temperature between the inside and outside of glass in very big. Show Answer Correct Answer: A) Of the unequal expansion and contraction of the inner and out glass layer. 23. Expansion of iron on heating is which kind of change? A) Chemical. B) Desirable. C) Reversible. D) Both [b] and [c]. Show Answer Correct Answer: D) Both [b] and [c]. 24. Telephones or electric wires are made of a A) Metal. B) Iron. C) Allinum. D) Plastic. Show Answer Correct Answer: A) Metal. 25. A example of undesirable change A) A person falling sick. B) People dancing on stage. C) All the above. D) None of the above. Show Answer Correct Answer: A) A person falling sick. ← PreviousNext →Related QuizzesClass 6 Science Chapter 6 Changes Around Us Quiz 1Class 6 Science Chapter 6 Changes Around Us Quiz 2Class 6 Science Chapter 6 Changes Around Us Quiz 3Class 6 Science Chapter 6 Changes Around Us Quiz 4Class 6 Science Chapter 6 Changes Around Us Quiz 5Class 6 Science Chapter 6 Changes Around Us Quiz 6Class 6 Science Chapter 6 Changes Around Us Quiz 7Class 6 Science Chapter 6 Changes Around Us Quiz 8Class 6 Science Chapter 6 Changes Around Us Quiz 9Class 6 Science Chapter 6 Changes Around Us Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books