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Indian Navy SSR (Sailor) Chemical Equilibrium — practice questions

Explore 58 free Chemical Equilibrium questions in Indian Navy SSR (Sailor) 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 58.

Buffer capacity is maximum when: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, for the reaction H₂(g) + I₂(g) ⇌ 2 HI(g), the relation between Kp and Kc is which?Read the answer and worked solution →As per your syllabus, for an EXOTHERMIC reaction, what is the effect of raising the temperature on the equilibrium constant K?Read the answer and worked solution →According to the Bronsted-Lowry theory, an acid is:Read the answer and worked solution →Mendeleev arranged elements primarily in order of:Read the answer and worked solution →Which of the following elements would lose an electron easily?Read the answer and worked solution →Three elements B, Si and Ge areRead 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 →

Worked practice questions

Buffer capacity is maximum when:

  1. pH = pKa (equal acid and salt concentrations)
  2. pH > pKa
  3. pH < pKa
  4. pH = 7
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Correct answer: A. pH = pKa (equal acid and salt concentrations)

Buffer capacity is maximum when [salt] = [acid], which means pH = pKa. The buffer can neutralise added acid or base most effectively at this point.

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If K = 1 for a reaction, the standard free energy change ΔG°:

  1. Positive
  2. Zero
  3. Negative
  4. Cannot be determined
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Correct answer: B. Zero

ΔG° = -RT ln K. If K = 1, ln K = 0, so ΔG° = 0. At equilibrium for standard conditions, equilibrium constant equals 1.

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As per your syllabus, for the reaction H₂(g) + I₂(g) ⇌ 2 HI(g), the relation between Kp and Kc is which?

  1. Kp = Kc
  2. Kp = Kc / RT
  3. Kp = Kc × RT
  4. Kp = Kc²
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Correct answer: A. Kp = Kc

syllabus eqn 6.13: Δn = 2 − 2 = 0, so (RT)^0 = 1 ⇒ Kp = Kc.

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