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When a crystal of caustic soda is exposed to air, a liquid layer is deposited because

The s-Block Elements

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21/12/2021 11:54 am

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Palak23

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When a crystal of caustic soda is exposed to air, a liquid layer is deposited because

(a) Crystal loses water

(b) Crystal absorbs moisture and CO₂

(d) Crystal sublimes

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21/12/2021 11:57 am

Reyana09

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Correct answer: (b) Crystal absorbs moisture and CO₂

Explanation:

It is hygroscopic and deliquescent. It absorbs moisture and CO₂ to form NaCO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

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