Question

Densities of diamond and graphite are $3.5$ and $2.3$ $g/mL$ respectively. Increase in pressure on the equilibrium
$C_{diamond}\rightleftharpoons C_{graphite}$:

• A. Favours backward
• B. Favours forward reaction
• C. Has no effect
• D. Increases the reaction rate

Answer 1

The correct option is A Favours backward

Densities of diamond and graphite are $3.5$ and $2.3$ $g/mL$ respectively. Increase in pressure on the equilibrium favours backward.
$C_{diamond}\rightleftharpoons C_{graphite}$
When pressure is increased, the equilibrium will shift towards reverse direction. It is the direction that has higher density. Higher density means lower volume for a fixed mass of water.
Thus, increase in pressure will shift equilibrium towards lower volume.