Which of the following is not a general characteristic of equilibrium involving physical process ___________

(a)

Equilibrium is possible only in a closed system at a given temperature

(b)

The opposing processes occur at the same rate and there is a dynamic but stable condition

(c)

All the physical processes stop at equilibrium

(d)

All measurable properties of the system remains constant

For the formation of Two moles of SO₃(g) from SO₂ and O₂, the equilibrium constant is K₁. The equilibrium constant for the dissociation of one mole of SO₃ into SO₂ and O₂ is __________

(a)

\(1/K_1\)

(b)

\(K_1^2\)

(c)

\(({1\over K_1})^{1/2}\)

(d)

\({K_1\over 2}\)

[Co(H₂O)₆]²⁺ (aq) (pink) + 4Cl^– (aq) ⇌ [CoCl₄]^2– (aq) (blue) + 6 H₂O (l)
In the above reaction at equilibrium, the reaction mixture is blue in colour at room temperature. On cooling this mixture, it becomes pink in colour. On the basis of this information, which one of the following is true?

(a)

ΔH > 0 for the forward reaction

(b)

ΔH = 0 for the reverse reaction

(c)

ΔH < 0 for the forward reaction

(d)

Sign of the ΔH cannot be predicted based on this information

The equilibrium constants of the following reactions are:

N2 + 3H2 ⇌ 2NH3   :	K1
N2 + O2 ⇌ 2NO      :	K2
H2 + ½O2 ⇌ H2O   :	K3

The equilibrium constant (K) for the reaction ;
\({ 2NH }_{ 3 }+5/2{ O }_{ 2 }\overset { K }{ \rightleftharpoons } 2NO+{ 3H }_{ 2 }{ O },\) will be

(a)

\(K_2^3{K_3\over K_1}\)

(b)

\(K_1{K_3^3\over K_2}\)

(c)

\(K_2{K_3^3\over K_1}\)

(d)

\(K_2{K_3\over K_1}\)

A 20 litre container at 400 K contains CO₂ (g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO₂ attains its maximum value will be: Given that: SrCO₃ (S) ⇌ SrO (S) + CO₂(g)
KP = 1.6 atm

(a)

2 litre

(b)

5 litre

(c)

10 litre

(d)

4 litre