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pH of Soil

Some crops ar...

Question

Some crops are suitable for growing in soil with acidic nature. Which salt can be added, in order to increase the acidic nature of the soil?

A

Sodium hydroxide

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B

Milk of Magnesia

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C

Slaked lime

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D

Ammonium sulphate

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Solution

The correct option is D
Ammonium sulphate

Lowering the pH of the alkaline soil is done by using sulfur-based salts or directly adding sulphuric acid. Ammonium sulphate lowers the pH when added to the soil and the ammonium is nitrified by soil bacteria into nitrate and hydrogen ions.

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Some crops are suitable for growing in soil with acidic nature. Which salt can be added, in order to increase the acidic nature of the soil?

Question 5

When the soil is too basic in nature, plants do not grow well in it. To improve its quality what must be added to the soil?
(a) Organic matter
(b) Quicklime
(c) Slaked lime
(d) Calamine solution

Q. Sodium chloride salt is used for cooking. It is formed when hydrochloric acid is added to sodium hydroxide solution, both of which are corrosive in nature. But sodium chloride is not. Give reasons.

Which among the following changes are exothermic or endothermic in nature?

(a) Decomposition of ferrous sulphate

(b) Dilution of sulphuric acid

(c) Dissolution of sodium hydroxide in water

(d) Dissolution of ammonium chloride in water

Question 22
Which among the following changes are exothermic or endothermic in nature?

(a) Decomposition of ferrous sulphate

(b) Dilution of sulphuric acid

(c) Dissolution of sodium hydroxide in water

(d) Dissolution of ammonium chloride in water

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