2 Answers

Uri Loya · Answer 1 · 2019-09-24T03:09:03+0000

Answer: Option (B) is the correct answer.

Step-by-step explanation:

An exothermic reaction is defined as the chemical reaction in which there occurs release of heat.

For example,
$A + B \rightarrow AB + Heat$

In an exothermic reaction, energy of reactants is more than the energy of products.

Whereas an endothermic reaction is defined as a chemical reaction in which heat is absorbed by reactant molecules.

For example,
$A + B + Heat \rightarrow AB$

In endothermic reaction, energy of reactant molecules is less than the energy of products.

Thus, we can conclude that release of heat and/or light energy indicates that an exothermic reaction has taken place.

Qualiture · Answer 2 · 2019-09-25T15:43:21+0000

Answer:

The option B is correct option. Which is release of heat and/or light energy .

According to the definition of exothermic reaction :

An exothermic reaction is a chemical reaction that releases energy by light or heat.

From definition option B (release of heat and/or light energy) indicates that an exothermic reaction has taken place.

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