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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
Ethanoic acid has a .................... odour.
(a) Rotten eggs
(b) Pungent
(c) Vinegar-like
(d) Mild
Write the name and chemical formula of the simplest organic acid.
What happens when ethanoic acid reacts with sodium hydroxide? Write equation of the reaction involved.
Acetic acid smells like:
(1) a banana
(2) vinegar
(3) an orange
(4) a lemon
On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of:
(1) Calcium bicarbonate
(2) Calcium hydroxide
(3) Calcium carbonate
(4) Calcium acetate
Explain the following reaction with an example.
Saponification
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
Name the oxidising agent used in the conversion of ethanol to ethanoic acid.
How is ethanol to ethanoic acid an oxidation reaction different from the reaction in which ethanol burns in the presence of oxygen?
Observe the diagram given below and answer the questions:
- Name the reactants in this reaction.
- Which gas comes out as effervescence in the bigger test tube?
- What is the colour change in the lime water?
- In the above experiment instead of sodium carbonate which chemical can be used to get same products?
- Write the use of acetic acid.
