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Question

Sodium hydroxide solution do not react with :

A
CO2
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B
H2S
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C
SO3
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D
H2
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Solution

The correct option is C H2
NaOH is an alkali. CO2, H2S and SO3 are acidic oxides or acids. Hence, aqueous sodium hydroxide solution can react with CO2, H2S and SO3 and absorb them. However, H2 is neutral. Hence, sodium hydroxide solution cannot absorb hydrogen.

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