Question

which of the following reaction is an endothermic reaction
i) burning of coal
ii) decomposition of vegetable matter into compost
iii) process of respiration
iv) decomposition of calcium carbonate to form quick lime and carbon dioxide ​

Answer 1

Answer:

1)burning of coal is example of endothermic reaction because it require heat energy.

Answer 2

4 th option is right.

I hope it helps