Question

Which of the followings is incorrect?

• A. According to law of mass action, rate of a chemical reaction is proportional to molar concentration of reactants.
• B. If $K_c›1$ then products are present predominantly at equilibrium.
• C. Catalysts increase the rate of forward reaction as well as backward reaction.
• D. Value of equilibrium constant increases with increase in temperature.

Answer 1

The correct option is D Value of equilibrium constant increases with increase in temperature.

a) According to law of mass action,rate of a chemical reaction is proportional to molar concentration of reactants.

b) At equilibrium,

• Products are present predominantly if $K_c>1$
• Products are present predominantly if $K_c<1$

b) Though value of equilibrium constant doest not charge, catalysts increase the rate of both the forward and backward reactions.
c) $ln\frac{k_2}{k_1}=\frac{△H}{R}(\frac{1}{T_1}-\frac{1}{T_2})$
$If{T}_2>T_1,$

• $K_2<K_{1}if△H>0$ i.e. reaction is endothermic
• $K_2<K_{1}if△H>0$ i.e. reaction is exothermic

Hence this Option is incorrect