The incorrect statement among the following is:

1.	The value of the equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium
2.	Enzymes catalyse mainly bio-chemical reactions
3.	Coenzymes increase the catalytic activity of the enzyme
4.	The catalyst does not initiate any reaction

The correct statement among the following is:

When the initial concentration of the reactant is doubled,
the half-life period of a zero-order reaction:

The rate Constant of reaction A → B is 0.6 × 10^–3 \(\mathrm{molL}^{-1} \mathrm{~S}^{-1}\). If the Concentration of A is 5M, then the concentration of B after 20 min is:

1. 1.08M

2. 3.60M

3. 0.36M

4. 0.72M

When the initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction will be:
1. 0
2. 1
3. 1.5
4. 2 

A reaction having equal energies of activation for forward and reverse reaction has:

1. ΔG = 0

2. ΔH = 0

3. ΔH = ΔG = ΔS = 0

4. ΔS = 0