Alcohols, Phenols & Ethers is an important subject for NEET UG 2025, with a weightage of 4-5% and 2-3 questions anticipated. This chapter is under Organic Chemistry and checks your understanding of reactions, mechanisms, and properties, thus being a high-scoring section.
Concentrating on important subjects like electrophilic substitution reactions, Williamson ether synthesis, and acidic nature of phenols can enhance your NEET 2025 rank. Sufficient preparation from this chapter can help you score crucial marks in the NEET UG exam.
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Listed below is the list of Chemical Bonding & Molecular Structure questions with detailed solutions asked in NEET UG 2025 exam.
Question 1:
The compound A on treatment with Na gives B, and with PCl₅ gives C. B and C react together to give diethyl ether. A, B, and C are in the order:
Question 2:
In the reaction ..... the electrophile involved is:
Question 3:
Which of the following will not be soluble in sodium hydrogen carbonate?
Question 4:
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?
Question 5:
Which of the following orders of acid strength is correct?
NEET UG 2025 Chemistry Paper Exam Pattern
The NEET 2025 Chemistry section consists of 45 questions, which is 25% of the total paper. NEET Chemistry section is of total 180 marks.
| Section | Weightage (%) | Key Topics |
|---|---|---|
| Physical Chemistry | 30–35% | Thermodynamics, Electrochemistry, Chemical Kinetics, Equilibrium, and Solutions. |
| Inorganic Chemistry | 30–35% | Periodic Table, p-block, d-block, f-block elements, Coordination Compounds, and Chemical Bonding. |
| Organic Chemistry | 35–40% | Reaction mechanisms, Hydrocarbons, Alcohols, Phenols, Aldehydes, Ketones, Biomolecules, and Polymers. |
NEET 2025 Chemistry Chapter-Wise Weightage
| Unit | Weightage (%) | Class |
|---|---|---|
| Some Basic Concepts of Chemistry | 2–3% | Class 11 |
| Structure of Atom | 2–3% | Class 11 |
| Chemical Bonding and Molecular Structure | 5% | Class 11 |
| Thermodynamics | 5% | Class 11 |
| Equilibrium | 6% | Class 11 |
| Redox Reactions | 3% | Class 11 |
| The States of Matter | 3% | Class 11 |
| Solutions | 4% | Class 12 |
| Electrochemistry | 4–5% | Class 12 |
| Chemical Kinetics | 3% | Class 12 |
| Surface Chemistry | 2% | Class 12 |
| Classification of Elements and Periodicity | 2% | Class 11 |
| The p-Block Elements | 5% | Class 12 |
| The d- and f-Block Elements | 4% | Class 12 |
| Coordination Compounds | 5% | Class 12 |
| Haloalkanes and Haloarenes | 3% | Class 12 |
| Alcohols, Phenols, and Ethers | 4% | Class 12 |
| Aldehydes, Ketones, and Carboxylic Acids | 4–5% | Class 12 |
| Amines | 2–3% | Class 12 |
| Biomolecules | 3% | Class 12 |
| Polymers | 2% | Class 12 |
| Chemistry in Everyday Life | 2% | Class 12 |
NEET Last 5 Year Question Papers Pdf For NEET 2025 Preparation (2024 - 2017)
You can download the NEET previous year question paper pdfs with solutions from the table given below:
| NEET UG Previous Question Papers By NTA | Download PDF |
|---|---|
| NEET Exam 2024 | Check Here |
| NEET Exam 2023 | Check Here |
| NEET Exam 2022 | Check Here |
| NEET Exam 2021 | Check Here |
| NEET Exam 2020 | Check Here |
| NEET Exam 2019 | Check Here |
| NEET Exam 2018 | Check Here |
| NEET Exam 2017 | Check Here |
Difficulty Analysis Of NEET UG Chemistry:
| Section | Difficulty Level | Key Topics |
|---|---|---|
| Physical Chemistry | Moderate to Difficult | Chemical Kinetics, Thermodynamics, Electrochemistry, States of Matter, Surface Chemistry, Solutions |
| Organic Chemistry | Moderate | Hydrocarbons, Alcohols, Phenols and Ethers, Organic Chemistry based on Functional Groups, Biomolecules, Polymers, Chemistry in Everyday Life |
Frequently Asked Questions:-
1. How many questions come from alcohols, phenols, and ethers in NEET?
Answer: The number of questions asked from alcohols, phenols, and ethers in NEET can vary from year to year, but it is typically around 3-4 questions in the exam. You can refer to Alcohols phenols and ethers NEET notes for a better understanding of the topics covered in this section.
2. What are the important topics to study in alcohols, phenols, and ethers?
Answer: Important topics to study in alcohols, phenols, and ethers for NEET include:
- Preparation and properties of alcohols (reaction with alkali metals, reaction with acids)
- Phenols and their reactions (acidic character, electrophilic substitution)
- Ethers and their preparation
You can also refer to Alcohol phenol and ether PYQ NEET and Multiple choice questions on alcohols, phenols and ethers pdf for better preparation.
3. What are alcohols, phenols, and ethers?
Answer: Alcohols, phenols, and ethers are organic compounds:
- Alcohols are compounds containing the hydroxyl group (-OH) attached to a saturated carbon atom.
- Phenols are compounds with a hydroxyl group (-OH) directly attached to an aromatic ring.
- Ethers are compounds in which an oxygen atom is bonded to two alkyl or aryl groups.
4. Why are alcohols, phenols, and ethers considered as derivatives of water?
Answer: Alcohols, phenols, and ethers are considered derivatives of water because they all contain an oxygen atom bonded to other atoms, replacing one or both hydrogen atoms of water. For instance, alcohols have a hydroxyl group (-OH) in place of one hydrogen atom, phenols have an -OH group attached to an aromatic ring, and ethers have an oxygen atom bonded to two alkyl or aryl groups. For a detailed explanation, you can refer to PYQ of alcohol phenol and ether Class 12 and PYQ of alcohol phenol and ether CBSE Class 12.
5. What is an aromatic electrophilic substitution reaction Class 12?
Electrophilic substitution reaction Class 12 in the chemistry textbook, probably in the chapter on "Haloalkanes and Haloarenes" or organic chemistry. So, what is an aromatic electrophilic substitution reaction? It is a prominent reaction in organic chemistry where an electrophile—a electron-deficient species that adores electrons—substitutes a hydrogen atom on an aromatic ring, such as benzene.
For example, take the reaction of benzene, which is nitration of benzene. The reaction can be written as:
C₆H₆ + NO₂⁺ → C₆H₅NO₂ + H⁺
6. What is electrophilic and nucleophilic substitution?
Electrophilic Substitution:
An electrophilic substitution reaction occurs when an electrophile (a species that's starved of electrons) takes the place of an atom or group—more often than not a hydrogen—at a molecule, typically an aromatic one such as benzene.
C₆H₆ + NO₂⁺ → C₆H₅NO₂ + H⁺
Nucleophilic Substitution:
This is where a nucleophile—a species that is electron-rich and seeks to donate them—replaces a leaving group within a molecule.
CH₃CH₂Br + OH⁻ → CH₃CH₂OH + Br⁻
7. Why is it called electrophilic?
We got this term because of what happens with the attacking species during the reaction. "Electro" refers to electrons, and "philic" refers to loving or attracted. An electrophile is, therefore, a species that's electron-deficient and absolutely in need of scooping up electrons.
8. What is the mechanism of electrophilic substitution?
Step 1: Formation of the Sigma Complex
The electrophile (E⁺) attacks the π-electron cloud of the aromatic ring, creating a transient intermediate known as the sigma complex:
C₆H₆ + NO₂⁺ → [C₆H₆NO₂]⁺
Step 2: Loss of a Proton to Restore Aromaticity
A base steals a proton (H⁺) from the attacked carbon, restoring the aromaticity of the ring:
[C₆H₆NO₂]⁺ → C₆H₅NO₂ + H⁺
General Mechanism Overview:
- Electrophile generation: For instance, NO₂⁺ is formed from HNO₃ and H₂SO₄.
- Electrophilic attack: E⁺ + C₆H₆ → [C₆H₆E]⁺ (sigma complex).
- Loss of proton: [C₆H₆E]⁺ → C₆H₅E + H⁺.
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