\( 20 \mathrm{gm} \) of \( \mathrm{CaCO}_{3} \) on decomposition gives \( \mathrm{CO}_{2} \) at ...
\( 20 \mathrm{gm} \) of \( \mathrm{CaCO}_{3} \) on decomposition gives \( \mathrm{CO}_{2} \) at STP:
A 4.48 litre
B 22.4 litre
C 2.24 litre
-D 4.54 litre
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