Chemical And Ionic Equilibrium MCQ

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• The triple point for water is
  ক

  unique

  খ

  depends on p but is independent of T

  গ

  depends on T but is independent of p

  ঘ

  depends on both p and T
• On the pressure-temperature diagram for a one-component system, the point where the solid-liquid and the liquid-gas curves intersect is
  ক

  triple point

  খ

  critical point

  গ

  melting point

  ঘ

  boiling point
• 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
  ক

  1.86 K

  খ

  -1.86 K

  গ

  0.0186 K

  ঘ

  -0.0186 K
• 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
  ক

  6.76

  খ

  4.76

  গ

  2.76

  ঘ

  0.76
• The Bronsted acidity of boron hydrides follows the order
  ক

  B₂H₆ > B₄H₁₀ > B₅H₉ > B₁₀H₁₄

  খ

  B₂H₆ = B₄H₁₀ > B₅H₉ = B₁₀H₁₄

  গ

  B₁₀H₁₄ > B₅H₉ > B₄H₁₀ > B₂H₆

  ঘ

  B₅H₉ > B₄H₁₀ > B₂H₆ > B₁₀H₁₄
• For the pair of reactions given below,<br>(i) N₂(g) + 3H₂(g) $$ \rightleftharpoons $$ 2NH₃(g)<br>(ii) $$\frac{1}{2}$$N₂(g) + $$\frac{3}{2}$$H₂(g) $$ \rightleftharpoons $$ NH₃(g)<br>If at a particular temperature, K_p1 and K_p2 are the equilibrium constants for reactions (i) and (ii) respectively then
  ক

  K_p1 = 2K_p2

  খ

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

  গ

  2K_p1 = K_p2

  ঘ

  $${\text{K}}_{{\text{p1}}}^2$$ = K_p2
• 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
  ক

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

  খ

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

  গ

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

  ঘ

  $$p = \frac{{2{N_A}}}{{2V\overline \varepsilon }}$$
• <img src="/images/question-image/engineering-chemistry/chemical-and-ionic-equilibrium/1690892426-according-to-the-ehrenfest-classification-of-phase.png" title="Chemical and Ionic Equilibrium mcq question image" alt="Chemical and Ionic Equilibrium mcq question image"><br>According to the Ehrenfest classification of phase transition the above diagram refers to
  ক

  zeroth order phase transition

  খ

  first order phase transition

  গ

  second order phase transition

  ঘ

  λ transition
• Under the equilibrium conditions for the reaction, C(s) + CO₂(g) $$ \rightleftharpoons $$ 2CO(g), the total pressure is 12 atm. The value of K_p is
  ক

  16

  খ

  0.5

  গ

  2

  ঘ

  32
• The internal pressure of a van der Waals gas is
  ক

  independent of the molar volume

  খ

  inversely proportional to the molar volume

  গ

  inversely proportional to square of the molar volume

  ঘ

  directly proportional to the molar volume
• If a gas obeys equation of state p(V - nb) = nRT, the ratio $$\frac{{\left( {{C_p} - {C_V}} \right)}}{{{{\left( {{C_p} - {C_V}} \right)}_{{\text{ideal}}}}}}$$   is
  ক

  &gt; 1

  খ

  1

  গ

  (1 - b)
• The number of degrees of freedom of a system consisting of solid sucrose in equilibrium with an aqueous solution of sucrose is
  ক

  0

  খ

  1

  গ

  2

  ঘ

  3
• As per the kinetic theory of ideal gases, which of the following statements is not correct?
  ক

  Gas particles have mass but no volume

  খ

  Particles are in a Brownian motion between collisions

  গ

  During the collision, the system does not lose energy

  ঘ

  Particles exert same force per unit area on all sides of the container
• The number of degrees of freedom for a system consisting of NaCl(s), Na⁺ (aq) and Cl^- (aq) at equilibrium is
  ক

  2

  খ

  3

  গ

  4

  ঘ

  5
• Among the following, the equilibrium which is not affected by an increase in pressure is
  ক

  2SO₃(g) $$ \rightleftharpoons $$ 2SO₂(g) + O₂(g)

  খ

  H₂(g) + l₂(s) $$ \rightleftharpoons $$ 2HI(g)

  গ

  C(s) + H₂O(g) $$ \rightleftharpoons $$ CO(g) + H₂(g)

  ঘ

  3Fe(s) + 4H₂O(g) $$ \rightleftharpoons $$ Fe₃O₄(s) + 4H₂(g)
• An aqueous solution containing m moles of non-volatile solute freezes at -0.186°C. The elevation in the boiling point of the same aqueous solution (K_f = 1.86°, K_b = 0.512°) would be
  ক

  0.186

  খ

  0.512

  গ

  0.0512

  ঘ

  0.51/1.86
• In the mixture obtained by mixing 25.0 mL × 1.2 × 10^-3 MMnCl₂ and 35.0 mL of 6.0 × 10^-4 M KCl solution, the concentration (M) of Mn²⁺, K⁺ and CI^- ions respectively are
  ক

  6.0 × 10^-4, 3.0 × 10^-4, 1.5 × 10^-3

  খ

  6.0 × 10^-4, 3.0 × 10^-4, 9 × 10^-4

  গ

  5.0 × 10^-4, 3.5 × 10^-4, 13.5 × 10^-3

  ঘ

  5.0 × 10^-4, 3.5 × 10^-4, 8.5 × 10^-4