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
Some p-Block Elements ISC Class 11 MCQ & Practice Questions
Practice Some p-Block Elements MCQs for ISC Class 11 Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.
Register Free for Full Chemistry PracticeSome p-Block Elements Revision Guide for ISC 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 ISC Class 11 Chemistry, organise revision group-wise and compare oxidation states, acidic or basic character, anomalous behaviour, structures and important reactions.
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
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Performance Practice
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Top 18 Some p-Block Elements MCQs with Answers
These public questions are selected from the exact Some 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.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
1. The first element of Group 13 is:
Answer: B
Explanation: Boron is the first member of Group 13.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
2. The +1 oxidation state becomes more stable down Group 13 mainly because of:
Answer: D
Explanation: The ns2 pair increasingly resists participation in bonding down the group, stabilising +1.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
3. Boron differs markedly from the other Group 13 elements mainly because of its:
Answer: C
Explanation: Boron is unusually small, hard and non-metallic, giving it anomalous chemistry.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
4. Stability of the +2 oxidation state in Group 14 generally:
Answer: C
Explanation: The inert pair effect stabilises the lower +2 state in heavier members.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
5. The general valence-shell configuration of Group 13 elements is:
Answer: C
Explanation: Group 13 elements have three valence electrons with the general configuration ns2np1.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
6. The common oxidation state of Group 13 elements is:
Answer: A
Explanation: Loss or sharing of three valence electrons commonly gives the +3 oxidation state.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
7. Boron is classified as a:
Answer: B
Explanation: Boron has properties intermediate between metals and non-metals.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
8. Aluminium is:
Answer: A
Explanation: Aluminium is a typical metallic member of Group 13.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
9. Boron compounds are often covalent because boron has:
Answer: D
Explanation: Formation of B3+ is energetically unfavourable, so boron generally forms covalent compounds.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
10. BF3 behaves as a Lewis acid because boron:
Answer: C
Explanation: Boron has only six electrons around it in BF3 and can accept an electron pair.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
11. The Lewis acidity order of boron trihalides is commonly:
Answer: B
Explanation: pπ-pπ back bonding is strongest in BF3, reducing its electron deficiency and Lewis acidity.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
12. The reduced Lewis acidity of BF3 relative to BCl3 is explained by:
Answer: A
Explanation: Lone-pair donation from F into the empty boron p orbital reduces BF3 electron deficiency.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
13. On heating borax strongly, one product is:
Answer: C
Explanation: Borax loses water and ultimately forms a glassy boron oxide-containing mass.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
14. Diborane has the formula:
Answer: A
Explanation: The simplest stable boron hydride commonly discussed is diborane, B2H6.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
15. The general valence-shell configuration of Group 14 elements is:
Answer: B
Explanation: Group 14 elements contain four valence electrons.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
16. The first element of Group 14 is:
Answer: A
Explanation: Carbon heads Group 14.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
17. The common oxidation states of Group 14 are:
Answer: D
Explanation: Group 14 commonly exhibits +4 and +2 oxidation states.
ISC Class 11 Chemistry · Some p-Block Elements · Very Hard
18. The catenation tendency in Group 14 is greatest for:
Answer: A
Explanation: Carbon-carbon bonds are exceptionally strong, giving maximum catenation.
Some p-Block Elements Practice Tests
Chapter 11 Some p Block Elements Set 01
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 02
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 03
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 04
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 05
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 06
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 07
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 09
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 09
Chapter-wise Practice · Very Hard
Chapter 11 Some p Block Elements Set 10
Chapter-wise Practice · Very Hard
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.
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