Some Basic Concepts Of Chemistry Question 177

Question: Assuming fully decomposed, the volume of $ CO _2 $ released at STP on heating 9.85g of $ BaCO _3 $ (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:

$ BaCO _3\to BaO+CO _2\uparrow $

Molecular weight of $ BaCO _3=137+12+3\times 16 $ =197 $ \because $ 197gm produces 22.4L at S.T.P.
$ \therefore $ 9.85gm produces $ \frac{22.4}{197}\times 9.85=1.12L $ at S.T.P.



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