Question

2. The slaking of lime is an ... change
3. Many materials expand on being
4. On being heated, a gas expands than a sobo does​

Answer 1

Explanation:

Solution:- (B) Reaction 1- endothermic, Reaction 2- exothermic

When limestone is heated, the heat is absorbed and thus the reaction is endothermic and when steam is produced, the heat is released and thus the reaction is exothermic.