Question

Which of the following reactions is an endothermic reactions and why ?
1. burning of coal
2. Decomposition of vegetable matter into compost
3. Respiration in humans
4. Decomposition of calcium carbonate to form quick lime and carbon dioxide

Answer 1

decomposition of calcium carbonate to form quicklime and carbon dioxide is a endothermic reaction

because heat is absorbed in this reaction it is also thermite reaction