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Q.

One litre of CO2 is passed over hot coke. The volume becomes 1.4 litre. The per cent composition of products is:

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a

0.6 litre CO and 0.8 litre CO

b

0.8 1litre CO2

c

0.6 litre CO

d

None of these

answer is C.

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Detailed Solution

The reaction equation is

CO2​+C⟶2CO
 IV      IV         2V

Let X L of CO2​ gives 2X L of CO.

Volume of CO2​ left =1−X

Total volume =1.4L

So, (1−X)+2X=1.4
1+X=1.4

X=0.4L

As CO=2X=2×0.4=0.8L

Volume of CO2​ = 1.4−0.8 = 0.6L

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