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p-Block Elements WBJEE MCQ & Practice Questions

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

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p-Block Elements 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 Elements, then test recall with mixed MCQs.

What to practise in p-Block Elements

Concept Revision

Revise definitions, principles, equations, trends and core ideas from p-Block Elements 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 Elements MCQs with Answers

These public questions are selected from the exact p-Block Elements 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 Elements · Very Very Hard

1. p-Block concept check: The general valence-shell configuration of halogens is:

  • A. ns2np5
  • B. ns2np4
  • C. ns2np3
  • D. ns1
Answer: A
Explanation: Group 17 elements have seven valence electrons.

WBJEE Chemistry · p-Block Elements · Very Very Hard

2. p-Block concept check: The valence-shell configuration of noble gases except helium is:

  • A. ns2np5
  • B. ns2np4
  • C. ns2np2
  • D. ns2np6
Answer: D
Explanation: Most Group 18 elements possess a closed ns2np6 shell.

WBJEE Chemistry · p-Block Elements · Very Very Hard

3. p-Block concept check: Boron differs markedly from other Group 13 elements mainly because of its:

  • A. Presence of d electrons in valence shell
  • B. Metallic character
  • C. Small size and high ionisation enthalpy
  • D. Very large radius
Answer: C
Explanation: Boron is small, strongly covalent and anomalous relative to heavier congeners.

WBJEE Chemistry · p-Block Elements · Very Very Hard

4. p-Block concept check: The inert-pair effect down Group 14 increases the stability of:

  • A. +2 oxidation state
  • B. +4 oxidation state only
  • C. -4 oxidation state
  • D. +6 oxidation state
Answer: A
Explanation: The ns2 pair becomes less available for bonding down the group.

WBJEE Chemistry · p-Block Elements · Very Very Hard

5. p-Block concept check: Interhalogen compounds are formed between:

  • A. Two different halogens
  • B. A halogen and noble gas only
  • C. Two alkali metals
  • D. Carbon and hydrogen only
Answer: A
Explanation: Examples include ClF, BrF3 and IF7.

WBJEE Chemistry · p-Block Elements · Very Very Hard

6. p-Block concept check: The geometry of ClF3 is:

  • A. Trigonal planar
  • B. Linear
  • C. Tetrahedral
  • D. T-shaped
Answer: D
Explanation: Five electron domains with two equatorial lone pairs produce a T-shaped molecule.

WBJEE Chemistry · p-Block Elements · Very Very Hard

7. p-Block concept check: The geometry of IF7 is:

  • A. Square pyramidal
  • B. Trigonal bipyramidal
  • C. Pentagonal bipyramidal
  • D. Octahedral
Answer: C
Explanation: Seven I-F bonds adopt pentagonal-bipyramidal geometry.

WBJEE Chemistry · p-Block Elements · Very Very Hard

8. p-Block concept check: Xenon forms compounds most readily with:

  • A. Carbon only
  • B. Fluorine and oxygen
  • C. Sodium only
  • D. Hydrogen only
Answer: B
Explanation: Xe forms stable fluorides and oxides under suitable conditions.

WBJEE Chemistry · p-Block Elements · Very Very Hard

9. The general valence-shell configuration of halogens is:

  • A. ns2np3
  • B. ns1
  • C. ns2np5
  • D. ns2np4
Answer: C
Explanation: Group 17 elements have seven valence electrons.

WBJEE Chemistry · p-Block Elements · Very Very Hard

10. The valence-shell configuration of noble gases except helium is:

  • A. ns2np2
  • B. ns2np6
  • C. ns2np5
  • D. ns2np4
Answer: B
Explanation: Most Group 18 elements possess a closed ns2np6 shell.

WBJEE Chemistry · p-Block Elements · Very Very Hard

11. Boron differs markedly from other Group 13 elements mainly because of its:

  • A. Small size and high ionisation enthalpy
  • B. Very large radius
  • C. Presence of d electrons in valence shell
  • D. Metallic character
Answer: A
Explanation: Boron is small, strongly covalent and anomalous relative to heavier congeners.

WBJEE Chemistry · p-Block Elements · Very Very Hard

12. The inert-pair effect down Group 14 increases the stability of:

  • A. -4 oxidation state
  • B. +6 oxidation state
  • C. +2 oxidation state
  • D. +4 oxidation state only
Answer: C
Explanation: The ns2 pair becomes less available for bonding down the group.

WBJEE Chemistry · p-Block Elements · Very Very Hard

13. Interhalogen compounds are formed between:

  • A. Two alkali metals
  • B. Carbon and hydrogen only
  • C. Two different halogens
  • D. A halogen and noble gas only
Answer: C
Explanation: Examples include ClF, BrF3 and IF7.

WBJEE Chemistry · p-Block Elements · Very Very Hard

14. The geometry of ClF3 is:

  • A. Tetrahedral
  • B. T-shaped
  • C. Trigonal planar
  • D. Linear
Answer: B
Explanation: Five electron domains with two equatorial lone pairs produce a T-shaped molecule.

WBJEE Chemistry · p-Block Elements · Very Very Hard

15. The geometry of IF7 is:

  • A. Pentagonal bipyramidal
  • B. Octahedral
  • C. Square pyramidal
  • D. Trigonal bipyramidal
Answer: A
Explanation: Seven I-F bonds adopt pentagonal-bipyramidal geometry.

WBJEE Chemistry · p-Block Elements · Very Very Hard

16. Xenon forms compounds most readily with:

  • A. Sodium only
  • B. Hydrogen only
  • C. Carbon only
  • D. Fluorine and oxygen
Answer: D
Explanation: Xe forms stable fluorides and oxides under suitable conditions.

WBJEE Chemistry · p-Block Elements · Very Very Hard

17. p-Block concept check: The general valence-shell configuration of Group 13 elements is:

  • A. ns2np1
  • B. ns2np2
  • C. ns2np3
  • D. ns2np5
Answer: A
Explanation: Group 13 elements have three valence electrons with configuration ns2np1.

WBJEE Chemistry · p-Block Elements · Very Very Hard

18. p-Block concept check: The general valence-shell configuration of Group 14 elements is:

  • A. ns2np1
  • B. ns2np3
  • C. ns2np4
  • D. ns2np2
Answer: D
Explanation: Group 14 elements possess ns2np2 valence configuration.

WBJEE Chemistry · p-Block Elements · Very Very Hard

19. p-Block concept check: The general valence-shell configuration of Group 15 elements is:

  • A. ns2np4
  • B. ns2np5
  • C. ns2np3
  • D. ns2np2
Answer: C
Explanation: Group 15 elements possess a half-filled np3 subshell.

WBJEE Chemistry · p-Block Elements · Very Very Hard

20. p-Block concept check: The general valence-shell configuration of Group 16 elements is:

  • A. ns2np6
  • B. ns2np4
  • C. ns2np3
  • D. ns2np5
Answer: B
Explanation: Chalcogens have ns2np4 valence configuration.

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p-Block Elements Practice Tests

p-Block Elements 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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