Which of the following is not endothermic reaction?

Cooking of food

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Conversion of ice to water

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Sublimation of camphor

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Combustion of wood

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Solution

The correct option is D
Combustion of wood

Endothermic reaction involves absorption of heat while exothermic reaction involves evolution of heat.

Cooking of food- Energy should be supplied to cook food.

Conversion of ice to water- Ice absorbs heat from surrounding to melt into water.

Sublimation of camphor- Camphor absorbs heat and sublimates into vapour.

All the above reactions take in heat, so they are endothermic reaction. But combustion of wood gives out energy. So, it is an exothermic reaction.

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Similar questions

Q. Which of the following is(are) an endothermic process(es) ?
(i) Dilution of sulphuric acid
(ii) Sublimation of dry ice
(iii) Condensation of water vapours
(iv) Evaporation of water

One of the following does not undergo sublimation. This one is :

(a) camphor (b) dry ice (c) silica (d) iodine

Q. Ramesh has three samples of substance: ice, camphor, and water. He wants to change ice into water, camphor into gas, and water into vapours. Which processes should he follow for these conversions?

\begin{matrix} Ice to water & Camphor to gas & Water to vapour \end{matrix}

Question 12

Which of the following is (are) an endothermic process(es)?

(i) Dilution of sulphuric acid.
(ii) Sublimation of dry ice.
(iii) Condensation of water vapours.
(iv) Evaporation of water.

(a) (i) and (iii)
(b) (ii) only
(c) (iii) only
(d) (ii) and (iv)

Sort the following according to their physical and chemical changes.

(i) Combustion of wood

(ii) Melting of ice.

(iii) Cooking of food.

(iv) Rusting of iron.

(v) Ripening of fruits.

(vi) Tearing of papers.

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