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Which of the following are chemical chan...

Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood

A

A and B

B

B and C

C

A and C

D

B and D

Text Solution

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The correct Answer is:
A
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LAKHMIR SINGH & MANJIT KAUR-PHYSICAL AND CHEMICAL CHANGES-EXERCISE
  1. Which one of the following is not a chemical change ?

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  2. Which of the following are physical changes? (i) Melting of iron met...

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  3. Which of the following are chemical changes? (i) Decaying of wood ...

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  4. Which one of the following change can be reversed ?

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  5. Which of the following is not a physical change ?

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  6. When ice-cream melts : A. Heat is lost from the ice-cream B. Heat ...

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  7. Which of the following is a chemical change ?

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  8. One of the following is not a chemical change. This one is

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  9. Which of the following is not a characteristic of a physical change ?

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  10. The gas that turns lime water milky is

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  11. The ozone layer in the atmosphere absorbs

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  12. The rusting of iron can be prevented by coating it with a layer of : ...

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  13. Impure copper sulphate powder can be purified by the process of :

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  14. The gas we use in the kitchen is called liquefied petroleum gas (LPG)....

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  15. Anaerobic bacteria digest animal waste and produce biogas (change A). ...

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  16. When magnesium is burned in air, a powdery ash X is formed. X on disso...

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  17. When magnesium is burned in air, a powdery ash X is formed. X on disso...

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  18. When magnesium is burned in air, a powdery ash X is formed. X on disso...

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  19. When magnesium is burned in air, a powdery ash X is formed. X on disso...

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  20. When magnesium is burned in air, a powdery ash X is formed. X on disso...

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