Some Basic Concepts Of Chemistry Question 54
Question: In an organic compound of molar mass $ 108gmo{l^{-1}}C $ , H and N atoms are present in 9 : 1 : 3.5 by mass. Molecular formula can be:
Options:
A) $ C _6H _8N _2 $
B) $ C _7H _{10}N $
C) $ C _5H _6N _3 $
D) $ C _4H _{18}N _3 $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Moles $ \overset{C}{\mathop{\frac{9}{12}}},\overset{H}{\mathop{\frac{1}{1}}},\overset{N}{\mathop{\frac{3.5}{14}}},n=\frac{108}{54}=2 $
$ \frac{3}{4},:,1,:,\frac{1}{4} $
$ 4,:,1,:,4 $
$ \Rightarrow C _3H _4N\Rightarrow M.F.={{(C _3H _4N)} _{n}} $
$ MF={{( C _3H _4N )}_2}=C _6H _8N _2 $
