Question

A reversible reaction is in equilibrium. If a factor is changed which affects it,

then

• A. The speed of forward and backward reaction increases
• B. The speed of forward and backward reaction decreases
• C. Only the speed of that reaction increases which nullifies the factor causing increase of speed
• D. No difference

Answer 1

The correct option is C

Only the speed of that reaction increases which nullifies the factor

causing increase of speed

When a change is brought about in pressure, temperature or concentration of a reversible reation which has attained equilibrium, the equilibria tries to shift in such a direction which would neutralize the effect of change. This is known as Le-chatelier's principle