Question

A gaseous mixture contain `CH_(4)` and `C_(2)H_(6)` in equimolecular proportion. The weight of 2.24 litres of this mixture at NTP is
A. (a)4.6 g
B. (b)2.3 g
C. (c )1.6 g
D. (d)23 g

Answer 1

Correct Answer - B
Equimolecular proportion means both gases occupied equal volume`=2.24/2=1.12L` For `CH_(4):`
`22.4L CH_(4)` has mass`=16 g`
`1.12L CH_(4)` has mass`==16/22.4xx1.12=0.8 g`
For `C_(2)H_(6)`
`22.4L C_(2)H_(6)` has mass`=30 g`
`1.12L C_(2)H_(6)` has mass `30/22.4xx1.12=3.0/2 g=1.5 g`
Total mass`=1.5g +0.8g=2.3 g`.