b.
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 piena of wood
.
Answers
Answered by
2
Answer:
burning of wood is a chemical change
Answered by
2
Answer:
(i) Decaying of wood.
(ii) Burning of wood
Explanation:
Burning and decay result in formation of new substances and they cannot be reversed. Hence, they are chemical changes. Sawing of wood and hammering of a nail into a piece of wood are physical changes.
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