Question

Which chemical would be useful for absorbing carbon dioxide gas? A. KOH B. HCI C. H2SO4 D. HNO3 fuel​

Answer 1

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Actually Welcome to the Concept of the Physical Chemistry.

=> We know that, Carbon dioxide (CO2) is an acidic oxide in nature, hence when it is dissolved in water, it forms and Acid that is Carbonic Acid (H2CO3) .

=> Now we, know that an acid can only be attracted towards a base or vice versa to form a stable neutralised compound.

Hence, KOH is a strong base it absorbs the CO2 to form a stable compound.

==> A. KOH