Chemistry MCQs for 10th Class (Federal Board)

This page has over 1,000 multiple-choice questions for Chemistry (10th Class (Federal Board)), arranged in 8 chapters and 9 topics. The chapters include States of Matter, Gas Laws and Diffusion, Stoichiometry, Electrochemistry, Rates of Reaction and Salts and Industrial Chemistry, Oxides and Metals. Every question has four options, an instant answer and, where available, a short explanation.

Start practising Chemistry free →No registration needed

Chapters and topics

  • States of Matter, Gas Laws and Diffusion 1 topic · 116 MCQs
  • Stoichiometry 2 topics · 210 MCQs
  • Electrochemistry 1 topic · 113 MCQs
  • Rates of Reaction and Salts 1 topic · 120 MCQs
  • Industrial Chemistry, Oxides and Metals 1 topic · 110 MCQs
  • Hydrocarbons, Petroleum and Fossil Fuels 1 topic · 168 MCQs
  • Alcohols, Carboxylic Acids and Esters 1 topic · 113 MCQs
  • Polymers, Plastics, Proteins and Vitamins 1 topic · 105 MCQs

Sample Chemistry MCQs

Try these questions, then open the full practice to work through every chapter. Tap “Show the answer” after you choose.

Q1. A gas occupies 1 dm³ at 200 kPa. At constant temperature, its volume at 600 kPa is:

  1. 1 dm³
  2. 3 dm³
  3. 0.667 dm³
  4. 0.333 dm³
Show the answer

Answer: D. 0.333 dm³

Boyle's law: P₁V₁ = P₂V₂ ⇒ V₂ = 200×1/600 = 0.333 dm³.

Q2. What volume does 16 g of H₂ occupy at r.t.p.? (M = 2 g/mol, molar volume = 24 dm³)

  1. 179 dm³
  2. 192 dm³
  3. 384 dm³
  4. 96 dm³
Show the answer

Answer: B. 192 dm³

The correct answer is “192 dm³”. n = 16/2 = 8 mol; V = n × 24 = 192 dm³.

Q3. The half-equation Pb²⁺ + 2e⁻ → Pb takes place at the:

  1. anode (oxidation)
  2. external wire
  3. cathode (reduction)
  4. salt bridge
Show the answer

Answer: C. cathode (reduction)

The correct answer is “cathode (reduction)”. Pb²⁺ + 2e⁻ → Pb: cathode (reduction).

Q4. The mass of a flask decreases by 2 g in 100 s as CO₂ escapes. The average rate is:

  1. 0.04 g/s
  2. 200 g/s
  3. 0.02 g/s
  4. 50 g/s
Show the answer

Answer: C. 0.02 g/s

The correct answer is “0.02 g/s”. Rate = mass lost/time = 0.02 g/s.

Q5. A reactive metal + cold water produces:

  1. a metal hydroxide and hydrogen
  2. only steam
  3. a metal oxide and oxygen
  4. a salt and water
Show the answer

Answer: A. a metal hydroxide and hydrogen

The correct answer is “a metal hydroxide and hydrogen”. E.g. 2Na + 2H₂O → 2NaOH + H₂.

Q6. Which statement about hydrocarbons and petroleum is correct?

  1. Cracking joins small molecules
  2. Petroleum is a pure compound
  3. Alkenes decolourise bromine water
  4. Alkanes undergo addition reactions
Show the answer

Answer: C. Alkenes decolourise bromine water

The correct answer is “Alkenes decolourise bromine water”. Alkenes decolourise bromine water.

Practise all over 1,000 questions

Chapter-wise practice with instant answers, timed tests and (with a free account) your progress saved.

Start practising →