Which of following is used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?

Sodium hydroxide

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Potassium hydroxide

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Potassium carbonate

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Calcium carbonate

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Solution

The correct option is B Potassium hydroxide
Potassium hydroxide is used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound.
Carbon dioxide $(C O_{2})$ is slightly acidic in nature. Hence $K O H$ , which is a strong base, dissolves $C O_{2}$ evolved from the compound containing carbon and reacts with it to form potassium carbonate $K_{2} C O_{3}$ and water. Increase in the weight of potash bulbs will give the weight of $C O_{2}$ evolved from the organic compound.
$2 K O H (a q .) + C O_{2} (g) \to K_{2} C O_{3} + H_{2} O (l)$

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Similar questions

Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?

C O_{2}

C O_{2}

K_{2} C O_{3}

C O_{2}

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