Question

Which reaction is an example of an endothermic reaction? A. A + B C + D + heat B. A + C B +D + light C. B + C A +D + electricity D. A + B + heat C + D E. A + C B + D + electricity

Answer 1

Answer: D. $A+B+heat\rightarrow C+D$

Explanation: An endothermic reaction is a type of of chemical reaction in which energy is absorbed from the surrounding. The temperature of the surrounding decreases.

An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.

The chemical equation for an endothermic reaction is: $A+B+heat\rightarrow C+D$ because the energy in the form of light has been absorbed by the reactants. The difference in the energies of reactants and products is the energy which was being absorbed on completion of reaction.

Answer 2

Endothermic reaction:

The reaction in which is known as endothermic reaction or a reaction that takes in energy to form product is known as endothermic reaction.

A + B + heat ---->C + D  

So this is an example of endothermic reaction as here the heat will be absorbed to form product . Reactant A and B takes in heat and forms product C and D. So here the answer is D. A + B + heat ---->C + D