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Question
Q107) Assuming fully decomposed, the volume of CO2 released at STP on heating 9.85g of BaCO3 ( Atomic mass, Ba=137 ) will be... [ CBSE PMT 2000]




SOLUTION

BaCO3 → BaO + CO2
Molecular wt of BaCO3=197
9.85 g=0.05 mole which will give 0.05 mole of CO2
at STP 1 mole=22.4 litre
at STP 0.05 mole=1.12LAnswer: (d)