Question

What is required for reactants to form bonds? energy output
energy input
equilibrium
exchange reaction

Answer 1

energy input is the sole requirement for bond formation by the reactants as they require endothermic energy for bond formation

Answer 2

Answer:

Energy input is required for the reactants to form bonds.

Therefore, the right answer of the given question is energy input. Hence, the correct answer of the given question is option 2. Energy input.

Here rest of the options are eliminated. you can do further readings of the same on the internet or you can refer your books to get a clear understanding.