S Block Elements Question 140

Question: A substance absorbs $ CO_2 $ and violently reacts with water. That substance is

[AFMC 1988]

Options:

A) $ CaCO_3 $

B) $ CaO $

C) $ H_2SO_4 $

D) $ ZnO $

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Answer:

Correct Answer: B

Solution:

$ CaO+CO_2\to CaCO_3 $

$ CaO+H_2O\to Ca{{(OH)}_2} $