JEE Main Chemistry: P Block Elements High-Yield Practice Questions, Formulas & PYQ Breakdown (2026-27)
Published: October 25, 2026
Author: NEET & JEE STUDY HUB
🎯 Curriculum & Exam Overview
Comprehensive chapter breakdown covering core theoretical principles, foundational laws, and structured step-by-step problem-solving methods strictly aligned with the updated 2026-27 curriculum.
🚀 NTA JEE Main 2027 Countdown
January Session 1 Sprint
JEE Main 2027 Engineering Focus: High-Yield Problem Solving & Negative Marking Defense
- Session 1 Registration Timeline: Registration for JEE Main 2027 Session 1 opens in November on jeemain.nta.nic.in. January exam performance sets your prime percentile baseline.
- Negative Marking Safeguard (-1): Eliminate blind guesswork. Prioritize question selection, dimensional checks, and options elimination to maximize net marks.
- Multi-Concept Problem Linkages: JEE questions integrate multiple domains (e.g. Calculus with Mechanics, or Thermodynamics with Equilibrium) into single composite problems.
- Timed Shift PYQ Practice: Solve at least 15-20 recent shift questions (2021-2026) under a strict 2.5-minute timer per numerical/MCQ.
⚡ JEE Main Exam Blueprint & Problem-Solving Guidelines
📊 Expected Weightage
High-Yield Chapter (Typically 5 to 8 marks across MCQ, Assertion-Reason, and Structured Step-Answer sections in CBSE board papers).
✍️ Examiner & Scoring Insight
CBSE examiners allocate discrete 0.5 and 1-mark increments for formula definition, intermediate substitution, correct SI units, and neat labeled diagrams.
1. 📚 Quick Revision Notes & Core Theory
1
Strict adherence to NCERT definitions, standard SI units, and official notation.
2
Multi-step conceptual derivation from fundamental postulates to advanced applications.
3
High-frequency board-pattern problem classifications and key diagnostic steps.
⚡ High-Yield Formula & Reaction Sheet
- Primary Governing Equation: Verify dimensions and stoichiometry across both sides.
- Proportionality & Limiting Conditions: Identify critical boundary states and constants.
⚠️ Common Board Trap Alert
Watch out for unit conversions (e.g. cm to meters, Celsius to Kelvin) and sign conventions in directional calculations.
📺 High-yield video lesson for this chapter will premiere on @qbnexa_official.
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3. 📝 Interactive Chapter DPP & Practice Questions
Question 1 • MCQ
🔥 JEE Main (2023)
4 Mark(s)
A. Ammonium salts produce haze in atmosphere.
B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals.
C. Polychlorinated biphenyls act as cleansing solvents.
D. 'Blue baby' syndrome occurs due to the presence of excess of sulphate ions in water.
Choose the correct answer from the options given below :-
(A) A, B and C only
(B) B and C only
(C) A and D only
(D) A and C only
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (d)
Explanation: B. $\overset{\cdot}{\mathrm{Cl}} + \mathrm{O}_3 \longrightarrow \mathrm{O}_2 + \overset{\cdot}{\mathrm{ClO}}$
D. 'Blue baby' syndrome occurs due to the presence of excess of nitrate ions in water.
Question 2 • MCQ
🔥 JEE Main (2019)
4 Mark(s)
The chloride that CANNOT get hydrolysed is :
(A) $SiCl_4$
(B) $SnCl_4$
(C) $PbCl_4$
(D) $CCl_4$
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (d)
Explanation: $CCl_4$ cannot get hydrolyzed due to the absence ofvacant orbital at carbon atom.
Question 3 • MCQ
🔥 TS EAMCET (2022)
4 Mark(s)
Phosphorus and phosphoric acids are, respectively,
............... acids.
(A) dibasic, tribasic
(B) tribasic, tribasic
(C) tribasic, dibasic
(D) tetrabasic, tribasic
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (a)
Explanation: Phosphorus acid gives two $\mathrm{H}^{+}$ ions thus, it is dibasic.
$ \mathrm{H}_3 \mathrm{PO}_3 \longrightarrow 2 \mathrm{H}^{+}+\mathrm{HPO}_3^{2-} $
Phosphoric acid gives three $\mathrm{H}^{+}$ions. Thus, it is tribasic.
$ \mathrm{H}_3 \mathrm{PO}_4 \longrightarrow 3 \mathrm{H}^{+}+\mathrm{PO}_4^{3-} $
Question 4 • MCQ
🔥 JEE Main (2018)
4 Mark(s)
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the aforementioned solution, a white precipitate is obtained which does not dissolve in dil. nitric acid. The anion is :
(A) $CO_3^{2−}$
(B) $SO_4^{2−}$
(C) $Cl^{−}$
(D) $S^{2−}$
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (c)
Explanation: Detailed pedagogical breakdown based on official NCERT syllabus criteria.
Question 5 • MCQ
🔥 JEE Main (2005)
4 Mark(s)
The structure of diborane $(\mathrm{B}_2\mathrm{H}_6)$ contains
(A) four $\text{2 c-2 e}$ bonds and two $\text{3 c-2 e}$ bonds
(B) two $\text{2 c-2 e}$ bonds and four $\text{3 c-2 e}$ bonds
(C) two $\text{2 c-2 e}$ bonds and two $\text{3 c-3 e}$ bonds
(D) four $\text{2 c-2 e}$ bonds and four $\text{3 c-2 e}$ bonds
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (a)
Explanation: In diborane structure $\mathrm{B}_2\mathrm{H}_6$ there are four $\text{2 c-2 e}$ bonds and two $\text{3 c-2 e}$ bonds (see structure of diborane).
 Note : $\text{2 c-2 e}$ bond means two center two electron bond and $\text{3 c-2 e}$ bond means three center two electron bond.
4. ❓ Frequently Asked Questions (Exam Strategy)
❓ How many questions appear from JEE Main Chemistry: P Block Elements High-Yield Practice Questions, Formulas & PYQ Breakdown (2026-27) in JEE Main Session 1?
Typically 1 to 2 questions (4 to 8 marks) appear from JEE Main Chemistry: P Block Elements High-Yield Practice Questions, Formulas & PYQ Breakdown (2026-27), frequently featuring combined multi-topic concepts.
❓ What is the best approach to avoid negative marks in JEE Main Chemistry: P Block Elements High-Yield Practice Questions, Formulas & PYQ Breakdown (2026-27)?
Master standard shortcut formulas, verify boundary states (e.g. t=0, infinity), and skip uncertain numerical value questions.
❓ What are the most scoring topics in JEE Main Chemistry: P Block Elements High-Yield Practice Questions, Formulas & PYQ Breakdown (2026-27)?
Direct formula applications, NCERT exemplar problem types, and standard step-by-step derivations carry the highest mark density.
❓ How should I revise JEE Main Chemistry: P Block Elements High-Yield Practice Questions, Formulas & PYQ Breakdown (2026-27) for upcoming exams?
First master the core definitions and formula sheet, then solve 10-15 authentic PYQs with timed condition constraints.
❓ Are step-by-step solutions included in this question bank?
Yes, every question includes complete transparent reasoning, correct answer keys, and speed shortcuts.
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