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Indian Navy SSR Chemical Equilibrium — practice questions

Explore 55 free Chemical Equilibrium questions in Indian Navy SSR Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Equilibrium questions and exercises with answers

Showing questions 1–30 of 55.

For the reaction aA + bB ⇌ cC + dD at equilibrium, the equilibrium constant Kc is:Read the answer and worked solution →Le Chatelier's principle states that a system at equilibrium responds to a stress by:Read the answer and worked solution →For weak acid HA with Ka = 10⁻⁵, [H+] in 0.1 M solution is approximately:Read the answer and worked solution →As per your syllabus, for the reaction H₂(g) + I₂(g) ⇌ 2 HI(g), the relation between Kp and Kc is which?Read the answer and worked solution →Match the element to its group numberRead the answer and worked solution →Order the atomic models as they were proposedRead the answer and worked solution →Match each scientist to their modelRead the answer and worked solution →Match each model to what it could NOT explainRead the answer and worked solution →True or false: Rutherford's modelRead the answer and worked solution →True or false: Bohr's modelRead the answer and worked solution →Complete the reason Bohr's model failsRead the answer and worked solution →Which model does this belong to?Read the answer and worked solution →Match each quantum number to what it is calledRead the answer and worked solution →True or false: the quantum mechanical modelRead the answer and worked solution →Order the structure: from atom down to electronRead the answer and worked solution →Complete the (n + l) ruleRead the answer and worked solution →True or false: orbital energiesRead the answer and worked solution →Match each rule to what it forbids or requiresRead the answer and worked solution →Tap every statement Hund's rule requiresRead the answer and worked solution →The fundamental particlesRead 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 →Which principle is being described?Read the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every statement true of the Schrodinger modelRead the answer and worked solution →Reading the models backRead the answer and worked solution →Assertion and reason: filling orbitalsRead the answer and worked solution →True or false: shells and subshellsRead the answer and worked solution →

Worked practice questions

For the reaction aA + bB ⇌ cC + dD at equilibrium, the equilibrium constant Kc is:

  1. [A][B][C][D]
  2. [A]ᵃ[B]ᵇ/[C]ᶜ[D]ᵈ
  3. Kp
  4. [C]ᶜ[D]ᵈ/[A]ᵃ[B]ᵇ
Show answer and solution

Correct answer: D. [C]ᶜ[D]ᵈ/[A]ᵃ[B]ᵇ

Kc = [C]ᶜ[D]ᵈ/[A]ᵃ[B]ᵇ where small letters are stoichiometric coefficients and the [] denotes molar concentrations at equilibrium.

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Le Chatelier's principle states that a system at equilibrium responds to a stress by:

  1. Doing nothing
  2. Always going backward
  3. Always going forward
  4. Shifting in a direction that partially offsets the stress
Show answer and solution

Correct answer: D. Shifting in a direction that partially offsets the stress

The system shifts in a direction that partially counteracts (offsets) the change applied. Applies to temperature, pressure, concentration changes.

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For weak acid HA with Ka = 10⁻⁵, [H+] in 0.1 M solution is approximately:

  1. 10⁻⁴
  2. 10⁻⁵
  3. 10⁻³
  4. 10⁻⁶
Show answer and solution

Correct answer: C. 10⁻³

For weak acid, [H+] ≈ √(Ka × C) = √(10⁻⁵ × 0.1) = √(10⁻⁶) = 10⁻³ M. So pH ≈ 3.

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