Chemistry MCQs for 1st Year (Punjab Board)

This page has over 20,000 multiple-choice questions for Chemistry (1st Year (Punjab Board)), arranged in 16 chapters and 149 topics. The chapters include Periodic Table and Periodic Properties, Atomic Structure, Chemical Bonding, Stoichiometry and States and Phases of Matter. Every question has four options, an instant answer and, where available, a short explanation.

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Chapters and topics

  • Periodic Table and Periodic Properties 7 topics · 961 MCQs
  • Atomic Structure 9 topics · 1036 MCQs
  • Chemical Bonding 9 topics · 1023 MCQs
  • Stoichiometry 7 topics · 899 MCQs
  • States and Phases of Matter 9 topics · 1079 MCQs
  • Chemical Energetics 9 topics · 992 MCQs
  • Reaction Kinetics 7 topics · 746 MCQs
  • Chemical Equilibrium 8 topics · 964 MCQs
  • Acid-Base Chemistry 9 topics · 1147 MCQs
  • Electrochemistry 11 topics · 2689 MCQs
  • Hydrocarbons 13 topics · 2208 MCQs
  • Nitrogen and Sulfur 11 topics · 1461 MCQs
  • Halogens 9 topics · 987 MCQs
  • Atmosphere 11 topics · 1306 MCQs
  • Basic Separation Techniques 9 topics · 1054 MCQs
  • Lab Safety and Practical Skills 11 topics · 1488 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. Fluorine belongs to the family of:

  1. chalcogens
  2. alkali metals
  3. transition elements
  4. halogens
Show the answer

Answer: D. halogens

The correct answer is “halogens”. Fluorine is in group 17, the halogens.

Q2. The isotopes of Li are 6 (7.5%), 7 (92.5%). Its relative atomic mass is:

  1. 6.5
  2. 7.92
  3. 6.92
  4. 6
Show the answer

Answer: C. 6.92

The correct answer is “6.92”. Aᵣ = Σ(mass × abundance)/100 = 6.92.

Q3. Which of the following contains a dative bond?

  1. NH₃
  2. H₂O
  3. NH₄⁺
  4. CH₄
Show the answer

Answer: C. NH₄⁺

The fourth N–H bond is formed from the lone pair of N.

Q4. How many moles are present in 22 g of C₃H₈ (M = 44 g mol⁻¹)?

  1. 1 mol
  2. 0.5 mol
  3. 5 mol
  4. 0.25 mol
Show the answer

Answer: B. 0.5 mol

The correct answer is “0.5 mol”. n = m/M = 22/44 = 0.5 mol.

Q5. The ideal gas equation is:

  1. P/V = nRT
  2. PV = nR/T
  3. PV = nRT
  4. PT = nRV
Show the answer

Answer: C. PV = nRT

It combines the laws of Boyle, Charles and Avogadro.

Q6. Which bond is stronger (has the higher bond energy): C–H or C–O?

  1. C–H
  2. bond strength cannot be compared
  3. C–O
  4. both are equally strong
Show the answer

Answer: A. C–H

C–H (413 kJ mol⁻¹) is stronger than C–O (358 kJ mol⁻¹).

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