s-Block ElementsHard

Question

Lime stone Quick lime 
Which of the following option describes the correct reactants, products and reaction conditions.

Options

A.(p) Strongly heating (q) Slaked lime (r) Ca(O2)2 (s) Cold water
B.(p) Strongly heating (q) Slaked lime (r) CaO2 (s) Cold water
C.(p) Strongly heating in presence of catalyst (q) Slaked lime (r) CaO (s) Cold water
D.(p) Strongly heating under high pressure (q) Slaked lime (r) CaO2 (s) Cold water

Solution

CaCO3 CaO
With hot water O2 is liberated.
CaO2 + H2O (hot) →  Ca(OH)2 + O2

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