Question

Which is incorrect statement about 1.7 g of $N{H}_3$?

• A. It contain 0.3 mole H - atom
• B. it contain 2.408 $\times$ 10${}^{23}$ atoms
• C. Mass % of hydrogen is 17.65 %
• D. Vapour density of $N{H}_3$ is 17

Answer 1

Answer: (D)

Vapour density of $N{H}_3$ is 17

Vapour density of $N{H}_3$ is not 17.

Its vapour density $=\frac{\text{molar mass}}{2}=\frac{17}{2}=8.5$

So, answer is D.