Question

While teaching the topic of physical and chemical changes, Mahima's teacher listed the conditions that
take place during a change.
I. Change in state
II. Variation in colour
III. Evolution of a gas
IV. Change in temperature
He then asked Mahima to identify the conditions based on which it can be said with certainty that a
particular change is chemical in nature.​

Answer 1

Answer:

a is answer

Explanation:

its because physical change is not permanent