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This is due to the reason that potassium bicarbonate (KHCO 3 ) formed as in intermediate (when CO 2 gas is passed through ammoniated solution of potassium chloride) is highly soluble in water and cannot be separated by filtration.

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The s-Block Elements

Long Answer Type

131.

What happens when:
(i) sodium metal is dropped in water?
(ii) sodium metal is heated in free supply of air?
(iii) sodium peroxide dissolves in water?

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Short Answer Type

132.

Write balanced equation for reactions between:
Na₂O₂ and water

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133.

Write balanced equation for reactions between:
KO₂ and water

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134.

Write balanced equation for reactions between:
Na₂O and CO₂.

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135.

Account for the following:
(i) Sodium imparts colour to the flame.
(ii) Sodium acts as a strong reducing agent.

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136.

Name a few important uses of sodium ?

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Long Answer Type

137.

Discuss in brief the Solvay process for the manufacture of washing soda.

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138.

Discuss the various reactions which occur in the Solvay ammonia process.

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Short Answer Type

139.

List some important uses of washing soda (sodium carbonate).

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140.
Potassium carbonate cannot be prepared by Solvay process. Why?

This is due to the reason that potassium bicarbonate (KHCO₃) formed as in intermediate (when CO₂ gas is passed through ammoniated solution of potassium chloride) is highly soluble in water and cannot be separated by filtration.

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