Some Basic Concepts Of Chemistry Question 127
Question: A hydrocarbon contains 10.5 g carbon and 1g hydrogen. Its 2.4 g has 1 L volume as 1 atm and $ 127^{o}C $ . Hydrocarbon is
Options:
A) $ C _6H _7 $
B) $ C _6H _6 $
C) $ C _5H _6 $
D) $ C _6H _6 $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ C=10.5g=\frac{10.5}{12}mol=0.87mol $
$ H=1g=\frac{1}{1}mol=1mol $
$ \therefore $ $ {{({C _{Q.87}})}_7}={C _{6.09}}H _7=C _6H _7 $
$ pV=nRT=\frac{w}{m}RT $
$ 1\times 1=\frac{24}{m}\times 0.082\times 400 $
$ m=79 $ Hence, the hydrocarbon is $ C _6H _7 $ .
