Substance A reacts with the copper hydroxide to give copper sulphate salt. Substance A also reacts with sodium hydroxide to give sodium sulphate salt. Identify substance A from the options given below.

Hydrochloric acid

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Sodium bicarbonate

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Ammonium hydroxide

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Sulphuric acid

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Solution

The correct option is D Sulphuric acid

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Q. Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium sulphate. In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form 9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is illustrated by this data ? Give reason for your choice.

(h) Name from the list of the substances given below, the substance which you would use to prepare the salts given below:
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Salts:
(i) Zinc sulphate
(ii) Copper sulphate
(iii) Sodium sulphate
(iv) Lead sulphate

Q. From the list of the substances given, name the substances which you would use to prepare each of the following salts:
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Q. Identify A and B.
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B: Reacts with sulphuric acid to give Glauber’s salt.

Q. From the list of substances given-Ammonium sulphate, Lead carbonate, chlorine, Copper nitrate, Ferrous sulphate -State a solution of the compound which gives a dirty green precipitate with sodium hydroxide.

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