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Question

KOH is preferably used to absorb CO2 gas because :

A
KHCO3 is soluble in water and NaHCO3 is sparingly soluble in water
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B
KOH is cheaper than NaOH
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C
KOH is more soluble than NaOH in water
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D
KOH is stronger base than NaOH
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Solution

The correct option is A KHCO3 is soluble in water and NaHCO3 is sparingly soluble in water
KOH is preferably used to absorb CO2 to produce KHCO3+H2O
KOH+CO2KHCO3+H2O
KOH is preferably used to absorb CO2 gas because KHCO3 whic is formed is soluble in water and NaHCO3 is sparingly soluble in water.
Hence, option A is correct.

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