In JEE Advanced Chemistry, P-block elements are considered as a moderate topic, carrying a weightage of around 6% with 2-3 questions asked each year. Most of the questions are conceptual, focused on elements.
The p-block elements, groups 13 and 14 of the periodic table are characterized by their valence electron configuration, where the outermost electron occupies a p-orbital. Group 13 elements include boron, aluminum, gallium, indium, and thallium, while Group 14 elements comprise carbon, silicon, germanium, tin, and lead.
Must Read Articles:
- Download JEE Advanced Syllabus 2025
- Download JEE Advanced 2024 Paper With Detailed Solutions
- JEE Advanced Previous Year Question Paper PDF Download
Listed below is the list of p-block elements questions with detailed solutions asked in JEE Advanced exam 2025:
Question 1:
The reaction of Xe and O2F2 gives a Xe compound P. The number of moles of HF produced by the complete hydrolysis of
1mol P is ______ .
Question 2:
The reaction Pb(NO3)2 and NaCl in water produces a precipitate that dissolves upon the addition of
HCl of appropriate concentration The dissolution of the precipitate is due to the formation of -
Question 3:
The reaction of HClO3 with HCl gives a paramagnetic gas, which upon reaction with O3 produces
- Cl2O
- ClO2
- Cl2O6
- Cl2O7
Question 4:
The compound(s) which react(s) with NH3 to give boron nitride (BN) is(are)-
- B
- B2H6
- B2O3
- HBF4
Question 5:
Dissolving 1.24g of white phosphorus in boiling NaOH solution in an inert atmosphere gives a gas Q The amount of CuSO4 (in g) required to completely consume the gas Q is ___ [Given : Atomic mass of
H=1,O=16,Na=23,P=31,S=32,Cu=63 ]
Question 6:
Ozonolysis of ClO2 produces oxide of chlorine. The average oxidation state of chlorine in this oxide is ____.
Question 7:
The correct statement(s) related to oxoacids of phosphorous is(are)
- Upon heating, H3PO3 undergoes a disproportionation reaction to produce H3PO4 and PH3
- While H3PO3 can act as a reducing agent, H3PO4 cannot.
- H3PO3 is a monobasic acid.
- The H atom of the P-H bond in H3PO3 is not ionizable in water.
Question 8:
With respect to hypochlorite, chlorate and perchlorate ions, choose the correct statement(s)
- The hypochlorite ion is the strongest conjugate base
- The molecular shape of only chlorate ion is influenced by the lone pair of electrons of CL
- The hypochlorite and chlorate ions disproportionate to give rise to identical set of ions
- The hypochlorite ion oxidizes the sulfite ion
JEE Advanced Exam Pattern 2025
The JEE Advanced exam consists of two papers i.e. 1 and 2 and it is compulsory for students to appear in both papers. Paper 1 will be conducted in the morning and Paper 2 in the afternoon. Students can appear for the exam in either of the languages English or Hindi.
JEE Advanced 2025 Exam Pattern Highlights
| Particulars | Highlights |
|---|---|
| Total Number of Paper | Two Paper (Paper 1 and 2) |
| Total Subjects | 3 (Mathematics, Physics, Chemistry) |
| Total Sections | 4 |
| Total Questions | 102 |
| Total Questions in each Subject | 17 |
| Total Marks | 360 |
| Total Marks in each Paper | 180 |
| Total Marks in each Subject | 60 |
| Negative Marking | Yes ( except Section III in Paper 1 and 2 and Section IV in Paper 2) |
| Type of Questions | MCQ, NAT, Statement-based, Match the Following |
| Exam Duration | 3 hours each paper |
JEE Advanced Chapter-wise Weightage
The JEE Advanced chapter-wise weightage helps you understand which topics carry more importance in the exam. By focusing on high-weightage chapters, you can improve your exam preparation. For example, in Mathematics, topics like Calculus and Algebra usually carry about 50-60% of the questions, while in Physics, Mechanics and Electromagnetism contribute more.
JEE Advanced Exam – Topic-wise (Chemistry)
| Topics | Weightage | Total Marks | Total Questions |
|---|---|---|---|
| Class 11 | |||
| Inorganic Chemistry-I (Chemical Bonding and Molecular Structure, p-Block Elements -Group 13 & 14) | 16% | 19 | 5 |
| Organic Chemistry-I (Benzene, Basic Principles of Organic Chemistry) | 11% | 13 | 4 |
| Physical Chemistry-I (Chemical Thermodynamics, Chemical and Ionic Equilibrium, Mole Concept-I, Atomic Structure, States of Matter: Gases and Liquids) | 24% | 29 | 8 |
| Class 12 | |||
| Inorganic Chemistry-II (Coordination Compounds,Isolation of Metals, d-Block Elements) | 11% | 13 | 4 |
| Organic Chemistry-Il (Phenols, Alkyl Halides, Biomolecules, Amines, Ethers) | 23% | 28 | 8 |
| Physical Chemistry-II (Surface Chemistry, Chemical Kinetics, Solid State, Electrochemistry, Solutions) | 15% | 8 | 5 |
Detailed JEE Advanced 2025 Marking Scheme
Candidates must note that the JEE Advanced marking scheme will be the same for both Paper 1 and Paper 2. However, the marks allotted to each section of the subjects will be different. Here is the detailed marking scheme for each section of the exam paper:
Marking Scheme for Paper 1 and Paper 2
| Sections | Total Marks | Marking Scheme |
|---|---|---|
| Section I | 12 | +3 for every correct answer, 0 marks for unanswered questions. |
| Section II | 12 | +4 if all correct options are selected; +3 if three out of four correct options are selected; +2 if two out of 3+ correct options are selected; +1 if one out of 2+ options is selected; 0 if unanswered. |
| Section III | 24 | +4 if only the correct integer value entered, 0 if unanswered or the answer is wrong. |
| Section IV | 12 | +3 if an option with the correct combinations is chosen; 0 if unanswered in Paper 1.+3 if the correct value is put; 0 if unanswered in Paper 2. |
Previous Years’ Question Paper
JEE Advanced 2024 Question Paper PDF
| Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
JEE Advanced 2023 Question Paper PDF
| Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
JEE Advanced 2022 Question Paper PDF
| Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
JEE Advanced 2021 Question Paper PDF
| Question Paper | PDF Download | ||
|---|---|---|---|
| Question Paper 1 PDF | Physics | Chemistry | Maths |
| Question Paper 2 PDF | Physics | Chemistry | Maths |
JEE Advanced 2020 Question Paper
| Question Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
Frequently Asked Questions:
Q1. Are p-Block Elements (Group 13 & 14) elements important for JEE Advanced exam 2025?
Answer: Yes, p - block element is an important chapter for JEE Advanced preparation. It helps in understanding the periodic table which covers different elements, which is the basis of Inorganic Chemistry.
As per the previous years the weightage and number of questions of p-Block Elements (Group 13 & 14) in the JEE Advanced exams
| Year | Number of Questions on p-Block Elements | Weightage |
|---|---|---|
| 2023 | 1-2 questions | 3% |
| 2022 | 1 question | 3-4% |
| 2021 | 1-2 questions | 3-5% |
| 2020 | 1 question | 2-3% |
Q2. Which part of Chemistry has more weightage in the JEE Advanced exam?
Answer: As per the paper analysis, the weightage of Chemistry in JEE Advanced Paper is as follows:
- Physical and Inorganic Chemistry: Each contributes approximately 30% of the total Chemistry marks.
- Organic Chemistry: Accounts for about 35% of the total Chemistry marks.
The JEE Main Chemistry important topics in each section are as follows:
| Part of Chemistry | Weightage in JEE | Key Topics |
| Physical Chemistry | 30% | Thermodynamics, Chemical Kinetics, Chemical Equilibrium, Electrochemistry, Solutions, Redox Reactions, Surface Chemistry |
| Inorganic Chemistry | 30% | Periodic Table and p-Block Elements, d-Block and f-Block Elements, Coordination Compounds, Qualitative Analysis, Chemical Bonding |
| Organic Chemistry | 35% | General Organic Chemistry, Stereochemistry, Hydrocarbons, Functional Groups (Alcohols, Ethers, Aldehydes, Ketones, Carboxylic Acids, etc.), Reaction Mechanisms, Polymers |
Q3. p-Block Elements (Group 13 & 14) Important Topics for JEE Advanced exam?
Answer: p-block elements is an important topic in JEE Advanced Chemistry, and it helps in understanding the periodic table.
Here are the important topics of p-block elements:
- Group 13: Reactivity towards acids, alkalis, and halogens; preparation, properties, and uses of borax, orthoboric acid, diborane, boron trifluoride, aluminium chloride, and alums; uses of boron and aluminium.
- Group 14: Reactivity towards water and halogen; allotropes of carbon and uses of carbon; preparation, properties, and uses of carbon monoxide, carbon dioxide, silicon dioxide, silicones, silicates, zeolites.
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