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Q.

20ml of a mixture of CH4 and C2H4 were burnt in excess of air. The volume of CO2 produced after explosion and cooling was 30ml. The composition of CH4 from the mixture is

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a

15 ml

b

10 ml

c

5 ml

d

8 ml

answer is C.

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Detailed Solution

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Let, VCH4=xml , VC2H4=20-xml CH4+2O2CO2+2H2O  xml                 xml C2H4+3O22CO2+2H2O 20-x              2(20-x) given, x+2(20-x)=30ml x=10ml

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