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  • 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) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (iv)

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) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Answers (1)

Answer: A

Solution: In the decaying or burning of wood, there will be a chemical change in the composition of wood hence it is a chemical process. Sowing of wood and hammering of nail into the piece of wood does not change the properties of wood chemically, hence it is a physical change. Hence, the correct option of this question is A.

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