Some Basic Concepts Of Chemistry Question 119
Question: A gaseous mixture contains $ CH _4 $ and $ C _2H _6 $ in equimolecular proportion. The weight of 2.24 litres of this mixture at NTP is
Options:
A) 4.6 g
B) 1.6 g
C) 2.3 g
D) 23 g
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Equimolecular proportion means both gases occupied equal volume $ =\frac{2.24}{2}=1.12L $
For $ CH _4 $ : 22.4L $ CH _4 $ has mass $ =16gm $
1.12L $ CH _4 $ has mass $ =\frac{16}{22.4}\times 1.12=0.8gm $ . For $ C _2H _6 $
22.4L $ C _2H _6 $ has mass = 30gm
1.12L $ C _2H _6 $ has mass $ =\frac{30}{22.4}\times 1.12 $ $ =\frac{3.0}{2}gm=1.5gm $
Total mass $ =1.5gm+0.8gm=2.3gm $ .
