In a gasseous mixture, if alkane `(C_(x)H_(2x +2))` and alaene `(C_(y)H_(2y))` are taken in `2 : 1` mole ratio, the average molecular weight of mixture is observed to be 20. If the same alkane and alkene are taken in `1 : 2` mole ratio, the average molecular weight of mixture of mixture is observed to be 24. Then, the valule of 'x' and 'y' and respectively :
A
`2,1`
B
`1,2`
C
`2,3`
D
`3,2`
Text Solution
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The correct Answer is:
B
In a gasseous mixture, if an alkane …………. `M_(mix). = (2.(14x +2)+1.(14y))/(3) = 20` `28x + 14y = 56` …(1) `M_(mix). = (1.(14x +2)+2.(14y))/(3)= 24` `14x +28y = 70` …(2)
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