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An ideal gaseous mixture of ethane (C2H6...

An ideal gaseous mixture of ethane `(C_2H_6)` and ethene `(C_2H_4)` occupies 28 litre at 1 atm and `273K`. The mixture reacts completely with `128 gO_2` to produce `CO_2 and H_2O`. Mole fraction at `C_2 H_6` in the mixture is :

A

`0.6`

B

`0.4`

C

`0.5`

D

`0.8`

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