Question

The reaction of which halogen with water is endothermic reaction

Answer 1

Dear student

The electrolysis of a water molecule is an endothermic reaction because it is an example of decomposition reaction, water molecule breaks into H2 and O2 . And mostly all the decomposition reactions are endothermic in nature. In the decomposition reaction, larger molecules breaks into smaller molecules and energy is required to break these bonds.
 

Answer 2

Explanation:

the acid is empolyed for etching of glass is