Which of the following substances are needed for the preparation of soap- nbsp-Animal fatCarbon dioxide nbsp-Sulphur dioxide nbsp-Sodium hydroxide nbsp-

The correct options are A Animal fat D Sodium hydroxide nbsp;Soap is a sodium or potassium salt of fatty acids. The steps involved in the prepartaion of soap ...

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Standard VII

Chemistry

Preparation of Soap

Which of the ...

Question

Which of the following substances are needed for the preparation of soap?

Animal fat

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Carbon dioxide

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Sulphur dioxide

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Sodium hydroxide

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Solution

The correct options are
A Animal fat
D Sodium hydroxide
Soap is a sodium or potassium salt of fatty acids.
The steps involved in the prepartaion of soap are:
1) Sodium hydroxide is dissolved in water.
2) Oil or animal fat is melted and added to it.
3) The above mixture is stirred and then allowed to heat.
4) Before the mixture solidifies, it is poured into a mould of desired shape and on cooling soap is formed.

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Similar questions

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ( $F e S_{2}$ ) + oxygen $\to$ ferric oxide + sulphur dioxide

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(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

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(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

Q. Write balanced equations for the following reactions:
(i) Iron (II) chloride solution with sodium hydroxide solution.
(ii) Chlorine and cold dilute sodium hydroxide solution.
(iii) Zinc and sodium hydroxide solution.
(iv) Sulphur dioxide and sodium hydroxide solution.
(Give the equation for the formation of the normal salt).

Making use only of substances chosen from those given below:

Dilute sulphuric acid
Zinc
Lead

sodium carbonate
sodium sulphite
calcium carbonate

Give the equations for the reactions by which you could obtain:
(i) hydrogen
(ii) sulphur dioxide
(iii) carbon dioxide
(iv) zinc carbonate (two steps required).

Q. Which of the following substances are needed for the preparation of soap?

Q. Which among the following substances are used to prepare sulphur dioxide in the laboratory?

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