First slide

Gaseous state

Question

At identical temperature and pressure the rate of diffusion of hydrogen gas is $3 \sqrt{3}$ times that of a hydrocarbon having molecular formula $C_{n} H_{2 n - 2}$ . The value of n is:

Moderate

Solution

$\begin{array}{l} \frac{r_{H_{2}}}{r_{HC}} = \sqrt{\frac{M_{HC}}{M_{H_{2}}}} \\ 3 \sqrt{3} = \sqrt{\frac{M_{HC}}{2}} or M_{HC} = (3 \sqrt{3})^{2} \times 2 = 54 \\ ∴ C_{n} H_{2 n - 2}, 12 \times n + (2 n - 2) = 54 \\ or n = 4 \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App