Question

Q.3. Why is respiration considered an exothermic reaction? Explain.
[2]
Q.4. Why are decomposition reactions called the opposite of combination reactions?
Write equations for these reactions.
[2]​

Answer 1

Answer:

Respiration is an exothermic reaction as it gives out heat as a product.

Decomposition reactions are opposite of combination reaction because in this the reactant break itself to give products.

AgCl------- Ag + Cl

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Answer 2

Answer:

3. The exothermic reaction release heat or energy .This is happen for respiration reaction for our body hen we breath out .

•carbohydrate present in food are broken down to form glucose .

•glucose combine with oxygen in cell and provide energy this reaction is known as respiration

Hence, respiration is considered as exothermic reaction