FBISE · Class 9

Class 9 Chemistry MCQs: Acids, Bases And Salts

Practice chapter-wise MCQs with answers and explanations. Use the quiz mode for timed online tests.

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Quick revision

Class 9 Chemistry MCQs Acids, Bases And Salts are one of the fastest ways to improve your board exam performance — especially when you practice with purpose, revise weak concepts, and learn from explanations.

On Prepzy, you can practice 53 MCQs from “Acids, Bases And Salts” in Chemistry for FBISE. Each question is designed to mirror the style, wording, and concept-testing approach used in Pakistani board papers.

Use this chapter page to revise definitions, formulas, and key ideas, then attempt the MCQs in small sets. Track patterns in your mistakes: is it a concept gap, a calculation error, or a misread statement? Fixing the pattern is what raises your score.

If you’re preparing for matric / SSC Part exams, focus on understanding the concept first, then speed. MCQs reward clarity — not memorization. A clear concept turns into fast correct answers.

What to focus on

  • Primary focus: Acids, Bases And Salts concepts tested in Class 9 Chemistry
  • Practice with instant answer-checking to reduce repeated mistakes
  • Revise common definitions, units, and standard results before timed practice
  • Aim for accuracy first, then build speed with short quizzes

Study tips

  • Read the question stem first, then scan options for distractors (near-correct choices).
  • If the chapter is formula-heavy, write a mini-formula sheet and revise it before every attempt.
  • After each practice set, re-attempt only the wrong MCQs to convert weak areas into strengths.
  • Mix easy + medium MCQs for momentum, then finish with hard questions for exam readiness.

MCQs (sample)

Showing 25 questions from this chapter. For a full timed test, use “Start online test”.

  1. 1. What are bases and hydroxides of metals primarily formed from?

    • Oxides and hydroxides of metals
    • Acids and bases
    • Salts and nitrates
    • Alkali metals
    Answer & explanation

    Correct: Oxides and hydroxides of metals

    Bases and hydroxides of metals consist of oxides and hydroxides of metals.

  2. 2. What is a property of acids according to Table 10.1?

    • Sour taste
    • Bitter taste
    • Turns blue litmus red
    • No effect on red litmus
    Answer & explanation

    Correct: Sour taste

    Acids are recognized by their sour taste, among other properties listed.

  3. 3. What taste do bases have?

    • Bitter
    • Sour
    • Sweet
    • Salty
    Answer & explanation

    Correct: Bitter

    Bases are characterized by having a bitter taste.

  4. 4. What is the taste of acids?

    • Sour
    • Bitter
    • Sweet
    • Salty
    Answer & explanation

    Correct: Sour

    Acids have a sour taste, as stated in the content.

  5. 5. What is a strong acid?

    • An acid that ionizes completely in aqueous solution.
    • An acid that ionizes partially in aqueous solution.
    • An acid that does not ionize in water.
    • An acid that forms fewer ions in solution.
    Answer & explanation

    Correct: An acid that ionizes completely in aqueous solution.

    A strong acid ionizes completely in aqueous solution.

  6. 6. What is produced when sodium reacts with oxygen?

    • Sodium hydroxide
    • Sodium oxide
    • Sodium chloride
    • Sodium sulfate
    Answer & explanation

    Correct: Sodium oxide

    Sodium reacts with oxygen to produce sodium oxide (Na2O).

  7. 7. According to the Arrhenius concept, what do acids produce when ionized in water?

    • H+ ions
    • OH- ions
    • Na+ ions
    • Cl- ions
    Answer & explanation

    Correct: H+ ions

    An acid ionizes in water to produce H+ ions according to the Arrhenius theory.

  8. 8. What color does red litmus paper turn when in contact with a base?

    • Blue
    • Green
    • Yellow
    • Brown
    Answer & explanation

    Correct: Blue

    Bases change the color of red litmus paper to blue.

  9. 9. What happens to blue litmus paper when it comes into contact with acids?

    • It turns red
    • It turns green
    • It remains blue
    • It turns yellow
    Answer & explanation

    Correct: It turns red

    Acids change the colour of blue litmus paper to red.

  10. 10. Which of the following is an example of a strong acid?

    • HCl
    • Ethanoic acid
    • H2O
    • NH3
    Answer & explanation

    Correct: HCl

    HCl is a strong acid because it ionizes 100% in aqueous solution.

  11. 11. What happens when metal oxides dissolve in water?

    • Metal cations and oxide ions are formed
    • Acids are formed
    • Salt is produced
    • Water becomes neutral
    Answer & explanation

    Correct: Metal cations and oxide ions are formed

    When metal oxides dissolve in water, they form metal cations and oxide ions in aqueous solution.

  12. 12. Which of the following is a common use of hydrochloric acid (HCl)?

    • Making soap
    • Removing scale from boilers
    • Manufacturing fertilizers
    • Making antacids
    Answer & explanation

    Correct: Removing scale from boilers

    Hydrochloric acid is commonly used for cleaning metals and removing scale from boilers.

  13. 13. What texture is associated with aqueous solutions of bases?

    • Slippery
    • Sticky
    • Smooth
    • Rough
    Answer & explanation

    Correct: Slippery

    Aqueous solutions of bases have a slippery touch.

  14. 14. What gas is liberated when acids react with metals?

    • Oxygen
    • Nitrogen
    • Hydrogen
    • Carbon dioxide
    Answer & explanation

    Correct: Hydrogen

    When acids react with metals, hydrogen gas is liberated in the form of bubbles.

  15. 15. What is a weak acid?

    • An acid that ionizes completely in water.
    • An acid that ionizes only a small percentage in water.
    • An acid that does not need water to ionize.
    • An acid that produces no ions.
    Answer & explanation

    Correct: An acid that ionizes only a small percentage in water.

    A weak acid ionizes only a small percentage in aqueous solutions.

  16. 16. Which of the following is an example of a metal oxide?

    • Al(OH)3
    • Na2O
    • H2O
    • Ca(OH)2
    Answer & explanation

    Correct: Na2O

    Na2O is an example of a metal oxide formed from sodium and oxygen.

  17. 17. What does the Bronsted-Lowery theory define an acid as?

    • Proton acceptor
    • Proton donor
    • Substance producing OH- ions
    • Substance producing Na+ ions
    Answer & explanation

    Correct: Proton donor

    According to the Bronsted-Lowery theory, an acid is defined as a proton donor.

  18. 18. What do bases produce when they decompose ammonium salts on heating?

    • Salt
    • Ammonia gas
    • Water
    • Oxygen gas
    Answer & explanation

    Correct: Ammonia gas

    Bases decompose ammonium salts on heating and liberate ammonia gas.

  19. 19. Which metals combine with acids to form salts and hydrogen?

    • Copper and Iron
    • Sodium and Potassium
    • Zinc and Magnesium
    • Lead and Silver
    Answer & explanation

    Correct: Zinc and Magnesium

    Acids combine with metals like zinc, magnesium, aluminium, and calcium to form salts and hydrogen.

  20. 20. Ethanoic acid ionizes up to what percentage in water?

    • 100%
    • 50%
    • 5%
    • 80%
    Answer & explanation

    Correct: 5%

    Ethanoic acid ionizes only up to 5% in water.

  21. 21. What does magnesium produce when it ignites in air?

    • Magnesium oxide
    • Magnesium hydroxide
    • Magnesium metal
    • Magnesium salt
    Answer & explanation

    Correct: Magnesium oxide

    Magnesium on ignition in air burns producing magnesium oxide (MgO).

  22. 22. Which of the following bases is used in making drain cleaners?

    • Phosphoric acid
    • Sodium hydroxide (NaOH)
    • Sulphuric acid (H2SO4)
    • Calcium hydroxide (Ca(OH)2)
    Answer & explanation

    Correct: Sodium hydroxide (NaOH)

    Sodium hydroxide is commonly used in drain cleaners.

  23. 23. What do bases neutralize to form salt and water?

    • Bases
    • Metals
    • Acids
    • Salts
    Answer & explanation

    Correct: Acids

    Bases neutralize acids to form salt and water.

  24. 24. What is formed when acids react with metal carbonates?

    • Salt and Hydrogen
    • Salt, Water, and Carbon Dioxide
    • Salt only
    • Water only
    Answer & explanation

    Correct: Salt, Water, and Carbon Dioxide

    Acids react with metal carbonates to form salts, water, and carbon dioxide.

  25. 25. Which of the following is a characteristic of strong bases?

    • They ionize partially in aqueous solution.
    • They ionize completely in aqueous solution.
    • They do not release OH ions.
    • They are insoluble in water.
    Answer & explanation

    Correct: They ionize completely in aqueous solution.

    Strong bases ionize completely in aqueous solutions.

FAQs

Are these Class 9 Chemistry MCQs Acids, Bases And Salts aligned with FBISE?

Yes. The MCQs are organized chapter-wise for FBISE and designed to match board exam patterns. If your teacher has added custom MCQs, they will also appear here.

How many MCQs should I practice from “Acids, Bases And Salts” each day?

A good daily target is 20–40 MCQs with full review of mistakes. If you’re short on time, do 15 MCQs but read explanations carefully.

What’s the best way to revise this chapter before an exam?

Revise the chapter summary, list your weak sub-topics, then practice MCQs in timed sets. Re-attempt wrong questions after a short break to lock in learning.

Can I take an online test for this chapter?

Yes. Start a chapter quiz to simulate an online test. Use it to improve speed and accuracy under time pressure.

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