Which among the following is an exothermic reaction-Melting solid salts-Photosynthesis-Decomposition of mercuric oxide-Respiration-

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Exothermic Reactions

Which among t...

Question

Which among the following is an exothermic reaction?

Melting solid salts

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Photosynthesis

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Decomposition of mercuric oxide

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Respiration

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The process of respiration is :

(a) an oxidation reaction which is endothermic

(b) a reduction reaction which is exothermic

(d) an oxidation reaction which is exothermic

(a) What do you understand by exothermic and endothermic reactions ?

(b) Give one example of an exothermic reaction and one of an endothermic reaction.

(i) Buring of natural gas (ii) Photosynthesis

(iii) Electrolysis of water (iv) Respitation

(v) Decomposition of calcium carbonate

H g)

2 H g O + 180 k J ⟶ 2 H g + O_{2}

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