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Indian Navy AA (Artificer Apprentice) Equilibrium Constant — practice questions

Explore 31 free Equilibrium Constant questions in Indian Navy AA (Artificer Apprentice) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Equilibrium Constant questions and exercises with answers

Showing questions 1–30 of 31.

For the reaction N2 + 3H2 ⇌ 2NH3, increasing pressure favours:Read the answer and worked solution →At 500 K, Kc for N2 + 3H2 ⇌ 2NH3 is 60 (in mol⁻² L²). Kp at 500 K (R = 0.0821):Read the answer and worked solution →For the reaction PCl5(g) ⇌ PCl3(g) + Cl2(g), if initial pressure of PCl5 is P0 and degree of dissociation is α, total pressure at equilibrium:Read the answer and worked solution →If K = 1 for a reaction, the standard free energy change ΔG°:Read the answer and worked solution →As per your syllabus, adding an INERT gas (e.g. argon) at CONSTANT VOLUME to a gaseous equilibrium has what effect?Read the answer and worked solution →As per your syllabus, eqn 6.29, at 298 K, what is the value of pH + pOH for any aqueous solution?Read the answer and worked solution →As per your syllabus, when [salt] = [acid] in a buffer, the pH of the buffer equals which quantity?Read the answer and worked solution →Match each scientist to their contributionRead the answer and worked solution →Ionic or covalent?Read the answer and worked solution →Complete the driver of bond formationRead the answer and worked solution →Single, double and triple bondsRead the answer and worked solution →True or false: Lewis structuresRead the answer and worked solution →Complete the definition of resonanceRead the answer and worked solution →Tap every bond parameter the chapter namesRead the answer and worked solution →True or false: ionic solidsRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Bonded pair or lone pair?Read the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the reasoning: why resonance is neededRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →True or false: what bond parameters affectRead the answer and worked solution →Bond parameters in useRead the answer and worked solution →Which parameter answers this?Read the answer and worked solution →True or false: resonanceRead the answer and worked solution →Order the steps: draw a Lewis structureRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Assertion and reason: structureRead the answer and worked solution →

Worked practice questions

For the reaction N2 + 3H2 ⇌ 2NH3, increasing pressure favours:

  1. Forward (fewer moles on RHS)
  2. Random direction
  3. No effect
  4. Reverse
Show answer and solution

Correct answer: A. Forward (fewer moles on RHS)

Reactants have 4 moles of gas (1 N2 + 3 H2), products have 2 moles (2 NH3). Increasing pressure shifts equilibrium toward fewer moles, hence toward products. This is the basis of Haber's process.

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At 500 K, Kc for N2 + 3H2 ⇌ 2NH3 is 60 (in mol⁻² L²). Kp at 500 K (R = 0.0821):

  1. 60
  2. 60/(RT)²
  3. 60 × (RT)
  4. 60 × (RT)²
Show answer and solution

Correct answer: B. 60/(RT)²

Δn_gas = 2 - 4 = -2. Kp = Kc (RT)^Δn = 60 × (0.0821 × 500)⁻² = 60 / (41.05)² ≈ 0.036 atm⁻².

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For the reaction PCl5(g) ⇌ PCl3(g) + Cl2(g), if initial pressure of PCl5 is P0 and degree of dissociation is α, total pressure at equilibrium:

  1. P0 × α
  2. P0(1 - α)
  3. P0
  4. P0(1 + α)
Show answer and solution

Correct answer: D. P0(1 + α)

Initial PCl5 = P0. At equilibrium: PCl5 = P0(1-α), PCl3 = P0α, Cl2 = P0α. Total = P0(1-α) + P0α + P0α = P0(1+α).

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