Chemical and Ionic Equilibrium MCQs Question and Answer in Engineering Chemistry Page-2 section-1

11.

According to the Ehrenfest classification of phase transition the above diagram refers to

A. zeroth order phase transition

B. first order phase transition

C. second order phase transition

D. λ transition

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12.
For 1 mol of a monoatomic ideal gas, the relation between pressure (p), volume (V) and average molecular kinetic energy $$\left( {\overline \varepsilon } \right)$$ is

A. $$p = \frac{{{N_A}\overline \varepsilon }}{V}$$

B. $$p = \frac{{{N_A}\overline \varepsilon }}{{3V}}$$

C. $$p = \frac{{2{N_A}\overline \varepsilon }}{{3V}}$$

D. $$p = \frac{{2{N_A}}}{{2V\overline \varepsilon }}$$

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13.
For the pair of reactions given below,
(i) N₂(g) + 3H₂(g) $$ \rightleftharpoons $$ 2NH₃(g)
(ii) $$\frac{1}{2}$$N₂(g) + $$\frac{3}{2}$$H₂(g) $$ \rightleftharpoons $$ NH₃(g)
If at a particular temperature, K_p1 and K_p2 are the equilibrium constants for reactions (i) and (ii) respectively then

A. K_p1 = 2K_p2

B. K_p1 = $${\text{K}}_{{\text{p2}}}^2$$

C. 2K_p1 = K_p2

D. $${\text{K}}_{{\text{p1}}}^2$$ = K_p2

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14.
The Bronsted acidity of boron hydrides follows the order

A. B₂H₆ > B₄H₁₀ > B₅H₉ > B₁₀H₁₄

B. B₂H₆ = B₄H₁₀ > B₅H₉ = B₁₀H₁₄

C. B₁₀H₁₄ > B₅H₉ > B₄H₁₀ > B₂H₆

D. B₅H₉ > B₄H₁₀ > B₂H₆ > B₁₀H₁₄

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15.
The pH of buffer solution containing 4 × 10^-3 and 0.4 moles of acetic acid (pK_a = 4.76) and sodium acetate respectively will be

A. 6.76

B. 4.76

C. 2.76

D. 0.76

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16.
The freezing point constant for water is 1.86 K (mol/kg)^-1. The freezing point when 0.01 mol glucose is added to 1 kg water is

A. 1.86 K

B. -1.86 K

C. 0.0186 K

D. -0.0186 K

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17.
On the pressure-temperature diagram for a one-component system, the point where the solid-liquid and the liquid-gas curves intersect is

A. triple point

B. critical point

C. melting point

D. boiling point

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18.
The triple point for water is

A. unique

B. depends on p but is independent of T

C. depends on T but is independent of p

D. depends on both p and T

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Chemical and Ionic Equilibrium MCQs Question and Answer in Engineering Chemistry

11. According to the Ehrenfest classification of phase transition the above diagram refers to

Answer & Solution

12. For 1 mol of a monoatomic ideal gas, the relation between pressure (p), volume (V) and average molecular kinetic energy $$\left( {\overline \varepsilon } \right)$$ is

Answer & Solution

13. For the pair of reactions given below, (i) N2(g) + 3H2(g) $$ \rightleftharpoons $$ 2NH3(g) (ii) $$\frac{1}{2}$$N2(g) + $$\frac{3}{2}$$H2(g) $$ \rightleftharpoons $$ NH3(g) If at a particular temperature, Kp1 and Kp2 are the equilibrium constants for reactions (i) and (ii) respectively then

Answer & Solution

14. The Bronsted acidity of boron hydrides follows the order

Answer & Solution

15. The pH of buffer solution containing 4 × 10-3 and 0.4 moles of acetic acid (pKa = 4.76) and sodium acetate respectively will be

Answer & Solution

16. The freezing point constant for water is 1.86 K (mol/kg)-1. The freezing point when 0.01 mol glucose is added to 1 kg water is

Answer & Solution

17. On the pressure-temperature diagram for a one-component system, the point where the solid-liquid and the liquid-gas curves intersect is

Answer & Solution

18. The triple point for water is

Answer & Solution

11.

According to the Ehrenfest classification of phase transition the above diagram refers to

12.
For 1 mol of a monoatomic ideal gas, the relation between pressure (p), volume (V) and average molecular kinetic energy $$\left( {\overline \varepsilon } \right)$$ is

14.
The Bronsted acidity of boron hydrides follows the order

15.
The pH of buffer solution containing 4 × 10^-3 and 0.4 moles of acetic acid (pK_a = 4.76) and sodium acetate respectively will be

16.
The freezing point constant for water is 1.86 K (mol/kg)^-1. The freezing point when 0.01 mol glucose is added to 1 kg water is

17.
On the pressure-temperature diagram for a one-component system, the point where the solid-liquid and the liquid-gas curves intersect is

18.
The triple point for water is