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प्रश्न
While studying saponification reaction for the preparation of soap, a teacher suggested to a student to add a small quantity of common salt to the reaction mixture. The function of common salt in this reaction is to
(A) reduce the alkalinity of the soap
(B) reduce the acidity of the soap
(C) enhance the cleansing capacity of soap
(D) favour precipitation of soap
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उत्तर
Common salt is added in saponification reaction, as it helps in the precipitation of soap by decreasing the solubility of soap.
Hence, the correct option is D.
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संबंधित प्रश्न
In order to study saponification reaction, we first prepare 20% solution of sodium hydroxide. If we record the temperature of this solution just after adding sodium hydroxide flakes to water and also test its nature using litmus, it may be concluded that the process of making this solution is
(A) exothermic and the solution is alkaline
(B) endothermic and the solution is alkaline
(C) endothermic and the solution is acidic
(D) exothermic and the solution is acidic
Complete the following chemical equations :CH3COOH+NaOH→
Complete the following chemical equations :CH3COOH + Na2CO3 →
Complete the following equation:
`CH_3 COOH + CH_2 H_5 OH` 
Ethanol can be oxidized to ethanoic acid. Write the equation and name the oxidizing agent.
What is the main constituent of vinegar?
Using appropriate catalysts, ethane can be oxidized to an alcohol. Name the alcohol formed when ethane is oxidized.
What are catalysts?
Give the balanced chemical equation of the following reaction:
Evolution of carbon dioxide by the action of ethanoic acid with NaHCO3.
What happens when a small piece of sodium is dropped in ethanol? Write the equation for this reaction.
