This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 6 Changes Around Us – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 6 Changes Around Us Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Melting of wax is a chemical change. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. Woolen yarn to a knitted sweater can we reverse it? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 3. An ..... change which cannot be bought back to its original state. A) Reversible. B) Irreversible. C) All the above. D) None of the above. Show Answer Correct Answer: B) Irreversible. 4. WHICH ONE OF THE FOLLOWING IS AN EXAMPLE OF IRREVERSIBLE CHANGE A) MELTING OF ICE. B) Melting of wax. C) BOILING OF WATER. D) Burning of wax. Show Answer Correct Answer: D) Burning of wax. 5. Conversion of solid to liquid by heating is called A) Evaporation. B) Condensation. C) Cooling. D) Decantation. Show Answer Correct Answer: A) Evaporation. 6. Is Cooking a Irreversible Change? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 7. Rusting of iron is an irreversible change A) False. B) True. C) Neither true nor false. D) None of the above. Show Answer Correct Answer: B) True. 8. A student learns that the bending of metallic wire is a reversible change. Why is it considered as a reversible change? A) Because it can be changed back into its previous shape. B) Because the change caused to the metallic wire is permanent. C) Because the change in colour is always considered as a reversible change. D) Because metallic wire changes its material more easily. Show Answer Correct Answer: A) Because it can be changed back into its previous shape. 9. Which one of the steps while burning the candle is not reversible? A) Melting of solid wax. B) Liquid wax changes into vapours. C) Wax vapours burns into flame. D) All of these. Show Answer Correct Answer: C) Wax vapours burns into flame. 10. BEST EXPLAINATION OF EXPANSION A) WHICH HAPPEN DURING SUMMER. B) WHICH HAPPEN DURING WINTERS. C) WHICH HAPPENS AT HOT WEATHER. D) NONE OF THESE. Show Answer Correct Answer: C) WHICH HAPPENS AT HOT WEATHER. 11. Which of the following statement is incorrect for a chemical reaction? A) Heat may be given out but never absorbed. B) The sound may be produced. C) A colour change may take place. D) A gas may be evolved. Show Answer Correct Answer: A) Heat may be given out but never absorbed. 12. Changes can occur by their own also. A) Yes, in every case. B) Never. C) True. D) False. Show Answer Correct Answer: C) True. 13. Is sour milk a physical or chemical change? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 14. A reversible change is a permanent change A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 15. Is growth of Plants a Slow Change? Yes or No? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 16. You have by mistake spilled ink on your notebook. Can this change be reversed? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 17. A physical change ..... A) Changes the physical properties of an object, but does not create a new substance. B) Creates a new substance and cannot be undone. C) All the above. D) None of the above. Show Answer Correct Answer: A) Changes the physical properties of an object, but does not create a new substance. 18. In a ..... chnage, the molecules of the substance remain exactly the same before and after the change. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 19. Bud to flower, is it reversible? (Yes / no) A) Yes. B) No. C) Don't know. D) None of the above. Show Answer Correct Answer: B) No. 20. Formation of paneer from milk, is the change that A) Can be reversed. B) Can't be reversed. C) Both 1 & 2. D) None of the above. Show Answer Correct Answer: B) Can't be reversed. 21. WHAT IS THE OTHER NAME OF CONTRACTION AND EXPANSION CHANGES A) PERIODIC CHANGES. B) SURROUNDED CHANGES. C) BOTH A AND B. D) NONE OF THESE. Show Answer Correct Answer: B) SURROUNDED CHANGES. 22. What are physical changes? A) I don't know. B) A change where no new substance are formed. C) A change where a new substance has formed. D) A new formation of gas. Show Answer Correct Answer: B) A change where no new substance are formed. 23. Physical changes can be brought about by A) Cooking. B) Exposing to air. C) Condensation. D) Dissolving. E) Raining. Show Answer Correct Answer: D) Dissolving. 24. Cooked food is the A) Chemical change. B) Physical change. C) Both(a)and(b). D) None of these. Show Answer Correct Answer: A) Chemical change. 25. Which of the following is an irreversible change and does not require any heat? A) Melting of wax. B) Rasting. C) Burning of coal. D) Breaking glass bowl. Show Answer Correct Answer: D) Breaking glass bowl. ← 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 10Class 6 Science Chapter 6 Changes Around Us Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books