Question

(A) 4
(B) 3
3. Which chemical would be useful for absorption of carbon dioxide gas
(A) KOH
(B) HCL
(C) H.SO, (D) HNO​

Answer 1

Answer:

KOH

Explanation:

Carbon dioxide is an acidic oxide. When dissolved in water it forms carbonic acid. The potassium or sodium hydroxide is a strong base. - So, here the potassium hydroxide absorbs the carbon dioxide liberating in the reaction and forms the potassium carbonate K2CO3 .