Question

For the following equilibrium
$\text{N}{\text{H}}_{\text{4}}\text{HS}\left(\text{s}\right)\rightleftharpoons \text{N}{\text{H}}_{\text{3}}\left(\text{g}\right)\text{+}{\text{H}}_{\text{2}}\text{S}\left(\text{g}\right)$; partial pressure of $\text{N}{\text{H}}_{\text{3}}$ will increase

• A. If $\text{N}{\text{H}}_{\text{3}}$ is added after equilibrium is established
• B. If ${\text{H}}_{\text{2}}\text{S}$ is added after equilibrium is established
• C. $\text{N}{\text{H}}_{\text{4}}\text{HS}$ is added into the container
• D. Volume of the flask is decreased

Answer 1

The correct option is A If $\text{N}{\text{H}}_{\text{3}}$ is added after equilibrium is established

The partial pressure of $\text{N}{\text{H}}_3$ will increase if $\text{N}{\text{H}}_3$ is added in accorandce with le chaterlier principle..because according to that on increasing the pressure the rxn shift to that side which have fewer no. of moles of gases.

Hence option (A) is correct.