Question

Identify these changes and state whether energy is absorbed or evolved:
(a) Burning of paper
(b) Growth in plants
C) Making of food by green leaves
(d) Lightning of an electric bulb
(e) Explosion of fire crackers​

Answer 1

Answer:

a)absorbed

b)absorbed

c)absorbed

d)evolved

e)evolved

Answer 2

Explanation:

(a) chemical change and heat is evolved

(b) chemical change and heat is absorbed

(c) chemical change and heat is absorbed

(d) physical change and heat is evolved

(e) chemical change and heat is evolved