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Endothermic and Exothermic Reaction

The conversio...

Question

The conversion of limestone to quicklime in presence of heat is a _______ reaction.

A

decomposition

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B

displacement

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C

combination

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D

disproportionation

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Solution

The correct option is A decomposition
Limestone is calcium carbonate. It decomposes in presence of heat to give calcium oxide (quicklime) and carbon dioxide. This is a decomposition reaction.
$C a C O_{3} H e a t - -- \to C a O + C O_{2}$

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Similar questions

Q. One of the following is an exothermic reaction. This is:
(a) electrolysis of water
(b) conversion of limestone into quicklime
(c) process of respiration
(d) process of photosynthesis

Q. 50 g limestone is heated. The quantity of quicklime produced is:

(C a C O_{3})

decompose into quicklime

(C a O)

on stone heating. How much quantity of limestone will be required to prepare

100 k g

(C a = 40, O = 16, C = 12)

Write the balanced chemical equations for the following reactions and identify the type of reaction:

Limestone is heated strongly to form quicklime and carbon dioxide gas is evolved

Q. Assertion: When limestone is heated strongly, it gives off

C O_{2}

. In metallurgy, this process is known as calcination.
Reason: Limestone is heated strongly in the presence of air

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