Question

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)

Answer 1

(a) (i) and (ii)