Some Basic Concepts Of Chemistry Question 177

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

Options:

A) 0.84 L

B) 2.24 L

C) 4.06 L

D) 1.12 L

Show Answer

Answer:

Correct Answer: D

Solution:

BaCO3BaO+CO2

Molecular weight of BaCO3=137+12+3×16 =197 197gm produces 22.4L at S.T.P.
9.85gm produces 22.4197×9.85=1.12L at S.T.P.



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