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p-Block Group 13 and 14 WBJEE MCQ & Practice Questions

Practice p-Block Group 13 and 14 MCQs for WBJEE Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

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p-Block Group 13 and 14 Revision Guide for WBJEE Chemistry

p-Block Elements covers periodic trends, structures, oxidation states and important compounds of groups 13 to 18 depending on the syllabus. Questions often test trends together with exceptions.

For WBJEE Chemistry, organise revision group-wise and compare oxidation states, acidic or basic character, anomalous behaviour, structures and important reactions.

Important Topics

  • Group-wise periodic trends
  • Anomalous behaviour of first elements
  • Oxidation states and inert-pair effect
  • Structures of important compounds
  • Acidic and basic character
  • Important reactions and uses

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for p-Block Group 13 and 14, then test recall with mixed MCQs.

What to practise in p-Block Group 13 and 14

Concept Revision

Revise definitions, principles, equations, trends and core ideas from p-Block Group 13 and 14 before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for WBJEE Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 20 p-Block Group 13 and 14 MCQs with Answers

These public questions are selected from the exact p-Block Group 13 and 14 chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

1. Which fundamental condition must be respected in solving p-Block Group 13 and 14 problems?

  • A. Ignore units
  • B. Assume coefficients are one
  • C. Ignore limiting conditions
  • D. Conservation of atoms and charge
Answer: D
Explanation: Atom and charge conservation are fundamental.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

2. At dynamic equilibrium relevant to p-Block Group 13 and 14:

  • A. Concentrations must be equal
  • B. Catalyst is consumed
  • C. Forward and reverse rates are equal
  • D. All molecular motion stops
Answer: C
Explanation: At equilibrium forward and reverse rates are equal.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

3. At constant T and P a spontaneous process has:

  • A. ΔH=0
  • B. ΔG<0
  • C. ΔG>0
  • D. ΔG=0 always
Answer: B
Explanation: Spontaneity requires ΔG<0.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

4. A catalyst in p-Block Group 13 and 14 generally:

  • A. Lowers activation energy without changing K at fixed T
  • B. Changes ΔG°
  • C. Changes ΔH
  • D. Changes K at fixed T
Answer: A
Explanation: Catalysts affect kinetics, not equilibrium thermodynamics.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

5. Oxidation means:

  • A. Gain of electrons
  • B. No oxidation-number change
  • C. Gain of protons
  • D. Loss of electrons
Answer: D
Explanation: Oxidation is electron loss.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

6. Reduction means:

  • A. Increase in oxidation number
  • B. Loss of protons
  • C. Gain of electrons
  • D. Loss of electrons
Answer: C
Explanation: Reduction is electron gain.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

7. A Lewis acid is:

  • A. Always anion
  • B. Electron-pair acceptor
  • C. Electron-pair donor
  • D. Always proton donor
Answer: B
Explanation: Lewis acids accept electron pairs.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

8. A Lewis base is:

  • A. Electron-pair donor
  • B. Electron-pair acceptor
  • C. Always cation
  • D. Always oxidant
Answer: A
Explanation: Lewis bases donate electron pairs.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

9. Which is a state function?

  • A. Heat
  • B. Work
  • C. Path length
  • D. Enthalpy
Answer: D
Explanation: Enthalpy is a state function.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

10. The correct relation is:

  • A. ΔG°=-KRT
  • B. ΔG°=RT/K
  • C. ΔG°=-RT lnK
  • D. ΔG°=RT lnK
Answer: C
Explanation: ΔG°=-RTlnK.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

11. For a first-order process, half-life is:

  • A. [A]0/(2k)
  • B. 0.693/k
  • C. k/0.693
  • D. 1/(k[A]0)
Answer: B
Explanation: t1/2=0.693/k.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

12. 0.20 mol solute in 0.50 L solution has molarity:

  • A. 0.10 M
  • B. 2.50 M
  • C. 0.70 M
  • D. 0.40 M
Answer: D
Explanation: M=0.20/0.50=0.40 M.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

13. For a weak acid, larger Ka means:

  • A. No ionisation
  • B. Stronger conjugate acid
  • C. Stronger acid
  • D. Weaker acid
Answer: C
Explanation: Larger Ka means greater ionisation.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

14. At 25°C:

  • A. pH+pOH=1
  • B. pH+pOH=14
  • C. pH+pOH=7
  • D. pH=pOH always
Answer: B
Explanation: pH+pOH=pKw=14.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

15. Oxidation in an electrochemical cell occurs at:

  • A. Anode
  • B. Cathode
  • C. Salt bridge
  • D. Wire
Answer: A
Explanation: Oxidation occurs at the anode.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

16. Reduction in an electrochemical cell occurs at:

  • A. Anode
  • B. Salt bridge
  • C. Wire
  • D. Cathode
Answer: D
Explanation: Reduction occurs at the cathode.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

17. Positive E°cell implies:

  • A. K<1 necessarily
  • B. No spontaneous reaction
  • C. ΔG°<0
  • D. ΔG°>0
Answer: C
Explanation: ΔG°=-nFE°.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

18. Higher bond order generally gives:

  • A. No effect
  • B. Shorter stronger bond
  • C. Longer weaker bond
  • D. Longer stronger bond
Answer: B
Explanation: Higher bond order strengthens and shortens bonds.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

19. A nucleophile is:

  • A. Electron-pair donor
  • B. Electron-pair acceptor
  • C. Always positive
  • D. Always radical
Answer: A
Explanation: Nucleophiles donate electron pairs.

WBJEE Chemistry · p-Block Group 13 and 14 · Very Very Hard

20. An electrophile is:

  • A. Electron-pair donor
  • B. Always negative
  • C. Always radical
  • D. Electron-pair acceptor
Answer: D
Explanation: Electrophiles accept electron pairs.

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p-Block Group 13 and 14 Practice Tests

p-Block Group 13 and 14 Frequently Asked Questions

How should I memorise p-Block Chemistry?

Use comparison tables by group and focus on trends, important exceptions, structures and reactions instead of memorising disconnected facts.

Why are exceptions important in p-Block questions?

Small size, high electronegativity, absence of d orbitals in second-period elements and inert-pair effects create frequently tested deviations from simple trends.

What is a good revision method for p-Block?

Revise one group at a time, write the common oxidation states and key compounds, then immediately solve targeted MCQs.

Continue with another chapter to build connected concepts and strengthen your overall Chemistry preparation.

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