Acids Bases and Salts MCQs for MDCAT Practice

Chemistry section, Acids Bases and Salts chapter. Sample questions from past PMC papers.

1. Question 1
   The pH of a solution contains 10-4 M{H+}
   • A.4
   • B.3
   • C.-3
   • D.0
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2. Question 2
   Which of the following is the Henderson-Hasselbalch equation?
   • A.pH = pKb + Log([Salt]/[Acid])
   • B.pH = pKa + Log([Salt]/[Acid])
   • C.pH = pKb + Log([Acid]/[Salt])
   • D.pH = pKa + Log([Acid]/[Salt])
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3. Question 3
   Sodium benzoate and benzoic acid of equimolar mixed to form buffer if pKa is 2 what will be pH?
   • A.1
   • B.2
   • C.0
   • D.None of these
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4. Question 4
   What volume of 0.4 M Ba(OH)2 (aq) is needed to exactly neutralize 100 milliliters of 0.2 M HBr (aq)?
   • A.25 mL
   • B.50 mL
   • C.100 mL
   • D.200 mL
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5. Question 5
   Which of the following combination is used to make buffer?
   • A.NaOH and HCI
   • B.KOH and H2SO
   • C.CH3COOH and CH3COONa
   • D.CH3COOH and NH4OH
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6. Question 6
   Which one f the following has the lowest pH?
   • A.1 M HF
   • B.1 M HCL
   • C.1 m CH3COOH
   • D.1 M NaOH
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7. Question 7
   If the degree of ionization of water be 1.8 × 10-9 at 298 K. Its ionization constant will be :
   • A.1.8 × 10-16
   • B.1 × 10-14
   • C.1 × 10-16
   • D.1.67 × 10-14
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8. Question 8
   Strong acids give leveling effect in
   • A.Protogenic solvent
   • B.Protophilic solvent
   • C.Aprotic solvent
   • D.Organic solvent
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