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Question

20 ml of CO2 is passed over red hot coke. The volume of CO evolved is:

C+CO22CO

A
20
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B
40
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C
60
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D
10
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Solution

The correct option is B 40
CO2+C2CO
22.4 ltr of CO2 gives 2×22.4 of CO
1 ltr of CO2 gives 2×22.422.4 of CO
20×103 ltr of CO2 gives 2×22.4×20×10322.4 of CO
=0.04
=40 cc of CO
Hence, the correct answer is B.

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