In a compound C, H, N atoms are present in 9 : 1 : 3.5 by weight.… - Vidyadip

MCQ

In a compound $C, H, N$ atoms are present in $9 : 1 : 3.5$ by weight. Molecular weight of compound is $108$ . Its molecular formula is

A
$C_2H_6N_2$
B
$C_3H_4N$
✓
$C_6H_8N_2$
D
$C_9H_{12}N_3$

✓

Answer

Correct option: C.

$C_6H_8N_2$

c
$9+1+3.5=13.5$

$13.5 \,\mathrm{g} \text { contains } \frac{9}{12} \,\mathrm{mole}$

$108 \,\mathrm{g}$ contains $\frac{9 \times 108}{12 \times 13.5}=6$ mole carbon

i.e., $\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{N}_{2}$

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