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Some p-Block Elements WBCHSE Class 11 MCQ & Practice Questions

Practice Some p-Block Elements MCQs for WBCHSE Class 11 Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

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Some p-Block Elements Revision Guide for WBCHSE Class 11 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 WBCHSE Class 11 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 Some p-Block Elements, then test recall with mixed MCQs.

What to practise in Some p-Block Elements

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Some p-Block Elements before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for WBCHSE Class 11 Chemistry.

Performance Practice

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Top 14 Some p-Block Elements MCQs with Answers

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WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

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

  • A. Small size and high ionisation enthalpy
  • B. Very large size
  • C. Metallic character
  • D. Presence of d electrons
Answer: A
Explanation: Boron is small, has high ionisation enthalpy and lacks vacant d orbitals.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

2. The stability of the +2 oxidation state down Group 14 generally:

  • A. Increases
  • B. Decreases
  • C. Remains identical
  • D. Becomes zero
Answer: A
Explanation: The inert-pair effect increasingly stabilises the lower +2 state.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

3. The inert-pair effect refers to reluctance of the:

  • A. Core p electrons to shield
  • B. ns2 electron pair to participate in bonding
  • C. np electrons to exist
  • D. d electrons to pair
Answer: B
Explanation: The outer s pair becomes increasingly less available for bonding in heavier p-block elements.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

4. The general valence-shell configuration of Group 13 elements is:

  • A. ns2np3
  • B. ns1
  • C. ns2np1
  • D. ns2np2
Answer: C
Explanation: Group 13 elements have three valence electrons with configuration ns2np1.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

5. The common oxidation states of Group 13 are:

  • A. +5 and +3
  • B. +3 and +1
  • C. +2 and +4
  • D. -1 and +1
Answer: B
Explanation: Group 13 commonly shows +3, while +1 becomes more stable down the group due to inert-pair effect.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

6. Boron is classified as a:

  • A. Typical metal
  • B. Noble gas
  • C. Alkali metal
  • D. Metalloid
Answer: D
Explanation: Boron shows properties intermediate between metals and nonmetals.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

7. Aluminium is primarily a:

  • A. Nonmetal
  • B. Noble gas
  • C. Metal
  • D. Metalloid
Answer: C
Explanation: Aluminium is a metallic Group 13 element.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

8. The formula of borax is:

  • A. BF3
  • B. Na2B4O7·10H2O
  • C. H3BO3
  • D. B2H6
Answer: B
Explanation: Borax is sodium tetraborate decahydrate.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

9. BF3 acts as a Lewis acid because boron:

  • A. Has a complete octet
  • B. Has a lone pair
  • C. Carries a permanent -3 charge
  • D. Has an incomplete octet
Answer: D
Explanation: Electron-deficient boron can accept an electron pair.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

10. The general valence-shell configuration of Group 14 is:

  • A. ns2np3
  • B. ns2np4
  • C. ns2np2
  • D. ns2np1
Answer: C
Explanation: Group 14 elements contain four valence electrons.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

11. The common oxidation states of Group 14 are:

  • A. +1 only
  • B. +4 and +2
  • C. +3 and +1
  • D. +5 and +3
Answer: B
Explanation: Group 14 commonly exhibits +4 and +2 oxidation states.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

12. The maximum tendency for catenation in Group 14 is shown by:

  • A. Tin
  • B. Lead
  • C. Carbon
  • D. Silicon
Answer: C
Explanation: Carbon has exceptionally strong element-element bonds.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

13. Due to inert-pair effect, Tl(I) is generally more stable than:

  • A. Tl(III)
  • B. B(III)
  • C. Al(III)
  • D. Ga(I) only
Answer: A
Explanation: For heavy Group 13 thallium, the +1 state is strongly stabilised.

WBCHSE Class 11 Chemistry · Some p-Block Elements · Very Hard

14. Due to inert-pair effect, Pb(II) is generally more stable than:

  • A. C(IV)
  • B. Si(IV)
  • C. Sn(II)
  • D. Pb(IV)
Answer: D
Explanation: The 6s2 pair in lead is relatively inert, stabilising +2.

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Some p-Block Elements Practice Tests

Some 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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