1st statement

Increasing reaction temperature can increase the

yield for all reversible chemical reactions.

2nd statement

Increasing reaction temperature can shorten the

time needed to attain equilibrium for all reversible

chemical reactions.

Refer to the following reversible reaction :

X₂(g) + 3Y₂(g) <=== > XY₃(g)

Which of the following combinations shows the effects of a catalyst on the rate of forward reaction, the rate of backward reaction and the yield of XY₃(g) ?

The following system attained equilibrium at a certain temperature :

2SO₂(g) + O₂(g) <===> 2SO₃(g)

Which of the following statements is / are correct when the volume of the system is decreased while the temperature remains unchanged ?

(1) The value of K_C increases.

(2) The equilibrium position shifts to the right.

(3) The rate of decomposition of SO₃(g) increases.

In a closed container and at a certain temperature, the following equilibrium was attained :

COCl₂(g) <===> CO(g) + Cl₂(g)

Which of the following statements is / are correct ?

(1) CO(g) and Cl₂(g) must be of the same concentration.

(2) The rate of decomposition of COCl₂(g) is equal to the

rate of formation of CO(g).

(3) The equilibrium constant K_c for the reaction increases

when the volume of the container increases.