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Q.

A mixture of methane and ethylene in the volume ratio x : y has a total volume of 30ml. On complete combustion it gave 40ml of CO2. If the ratio had been y : x, instead of x : y, what volume of CO2 could have been obtained?

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a

50ml

b

100ml

c

25ml

d

75ml

answer is A.

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Detailed Solution

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CH4+2O2CO2+2H2O C2H4+3O22CO2+2H2O Ratio of volumes of CO2 liberated=1:2 given, x+y=30ml , Total volumes of CO2=40ml Hence, x:y=20:10=2:1 If x:y=1:2, Then  Ratio of volumes of CO2=1:4 Total volume of CO2=10+40=50ml

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