Meta DescriptionNEET 2027 preparation material – Part 35 with NCERT-based Physics, Chemistry and Biology MCQs covering Atoms, Alcohols Phenols and Ethers, and Organisms and Populations, along with concept revision, practice questions, study strategy and disclaimer.SEO KeywordsNEET 2027, NEET preparation, NEET 2027 MCQs, Physics MCQs, Chemistry MCQs, Biology MCQs, NCERT, Atoms, Alcohols Phenols Ethers, Organisms and PopulationsHashtags#NEET2027 #NEETPreparation #NEETMCQ #PhysicsMCQ #ChemistryMCQ #BiologyMCQ #NCERT #Atoms #Alcohols #Biotechnology #NEETAspirants
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NEET 2027 preparation material – Part 35 with NCERT-based Physics, Chemistry and Biology MCQs covering Atoms, Alcohols Phenols and Ethers, and Organisms and Populations, along with concept revision, practice questions, study strategy and disclaimer.
SEO Keywords
NEET 2027, NEET preparation, NEET 2027 MCQs, Physics MCQs, Chemistry MCQs, Biology MCQs, NCERT, Atoms, Alcohols Phenols Ethers, Organisms and Populations
Hashtags
#NEET2027 #NEETPreparation #NEETMCQ #PhysicsMCQ #ChemistryMCQ #BiologyMCQ #NCERT #Atoms #Alcohols #Biotechnology #NEETAspirants
Introduction
Welcome to Part 35 of the NEET 2027 Possible Questions Series.
This part covers:
⚛️ Physics — Atoms
🧪 Chemistry — Alcohols, Phenols and Ethers
🧬 Biology — Organisms and Populations
The questions are designed for NCERT-based revision, conceptual understanding, MCQ practice and self-assessment.
These are practice questions, not official or guaranteed predictions of NEET 2027.
⚛️ Physics
Atoms
Question 1
Rutherford's alpha-particle scattering experiment led to the conclusion that:
A. Electrons are uniformly distributed throughout the atom
B. Positive charge is concentrated in a small nucleus
C. Atoms have no empty space
D. Electrons are present inside the nucleus
Answer: B. Positive charge is concentrated in a small nucleus
Question 2
According to Bohr's model, electrons in an atom:
A. Can have any arbitrary energy
B. Occupy certain permitted stationary orbits
C. Continuously lose energy in stationary orbits
D. Remain fixed at the nucleus
Answer: B. Occupy certain permitted stationary orbits
Question 3
The angular momentum of an electron in the nth Bohr orbit is:
A. nh
B. nh/2π
C. 2πnh
D. h/n
Answer: B. nh/2π
Question 4
When an electron jumps from a higher energy level to a lower energy level, it:
A. Absorbs a photon
B. Emits a photon
C. Absorbs a neutron
D. Emits an electron
Answer: B. Emits a photon
The photon energy is:
hν = Eᵢ − E_f
Question 5
The radius of the nth Bohr orbit of a hydrogen atom is proportional to:
A. n
B. 1/n
C. n²
D. 1/n²
Answer: C. n²
🧪 Chemistry
Alcohols, Phenols and Ethers
Question 1
The functional group present in alcohols is:
A. –CHO
B. –COOH
C. –OH
D. –CO–
Answer: C. –OH
Question 2
Phenol is more acidic than ethanol mainly because:
A. Phenol has a higher molecular mass
B. Phenoxide ion is resonance stabilised
C. Ethanol contains more hydrogen
D. Phenol is completely ionic
Answer: B. Phenoxide ion is resonance stabilised
Question 3
The reaction of an alcohol with sodium metal generally produces:
A. Sodium alkoxide and hydrogen
B. Sodium chloride
C. Alkene only
D. Aldehyde only
Answer: A. Sodium alkoxide and hydrogen
Question 4
Williamson synthesis is commonly used for the preparation of:
A. Aldehydes
B. Ethers
C. Ketones
D. Carboxylic acids
Answer: B. Ethers
Question 5
On dehydration, an alcohol can form:
A. Alkene
B. Alkane only
C. Carboxylic acid only
D. Amide
Answer: A. Alkene
🧬 Biology
Organisms and Populations
Question 1
The place where an organism naturally lives is called its:
A. Niche
B. Habitat
C. Population
D. Community
Answer: B. Habitat
Question 2
The functional role of an organism in its ecosystem is called its:
A. Habitat
B. Niche
C. Biome
D. Biosphere
Answer: B. Niche
Question 3
A group of individuals of the same species living in a particular geographical area is called:
A. Community
B. Population
C. Ecosystem
D. Biome
Answer: B. Population
Question 4
The interaction in which both species benefit is called:
A. Predation
B. Parasitism
C. Mutualism
D. Competition
Answer: C. Mutualism
Question 5
Which of the following is an example of an abiotic factor?
A. Predation
B. Competition
C. Temperature
D. Parasitism
Answer: C. Temperature
📚 Quick Revision
Physics — Atoms
Remember:
Rutherford → nuclear model
Bohr → quantised energy levels
Stationary orbit → electron does not continuously radiate energy
Angular momentum:
L = nh/2π
Photon emission:
hν = Eᵢ − E_f
Bohr radius:
rₙ ∝ n²
Key Idea
An electron can change its energy only by making a transition between allowed energy levels.
🧪 Chemistry — Alcohols, Phenols and Ethers
Important areas:
Classification of alcohols
Nomenclature
Preparation
Physical properties
Chemical reactions
Acidity of phenols
Reactions of phenols
Ethers
Williamson synthesis
Cleavage of ethers
Important Concept
The acidity of phenol is strongly influenced by the stability of the phenoxide ion.
Electron-withdrawing groups can generally increase phenol acidity by stabilising the negative charge, while electron-donating groups can have the opposite effect.
For NEET, learn the relevant NCERT examples carefully.
🧬 Biology — Organisms and Populations
Important NCERT concepts:
Habitat
Niche
Population
Population attributes
Birth rate
Death rate
Age distribution
Population growth
Mutualism
Competition
Predation
Parasitism
Quick Recall
Habitat → Where an organism lives
Niche → Functional role
Population → Same species in a particular area
Mutualism → Both partners benefit
Competition → Both organisms are negatively affected by competition for limited resources
💡 Concept Booster
1. Bohr Model
Bohr proposed that electrons occupy certain allowed energy levels.
When an electron moves:
Higher level → Lower level
Energy is released as a photon.
Lower level → Higher level
Energy is absorbed.
The energy difference is:
ΔE = hν
This is the basic idea behind atomic spectra.
2. Hydrogen Spectrum
When an electron in hydrogen transitions between energy levels, photons of specific frequencies are emitted or absorbed.
This produces discrete spectral lines rather than a continuous spectrum.
For hydrogen-like atoms, the energy levels follow a characteristic dependence on the principal quantum number.
For NEET, focus on:
Energy levels
Transitions
Spectral lines
Rydberg formula
Bohr radius
Ionisation energy
3. Alcohols and Phenols
Think of the chapter as:
Structure → Bond → Acidity → Reaction → Product
For example:
Alcohol + Na → Sodium alkoxide + H₂
and:
Alcohol → dehydration → Alkene
Phenol requires special attention because its acidity differs significantly from that of ordinary alcohols.
The key reason is resonance stabilisation of the phenoxide ion.
4. Organisms and Populations
Population ecology becomes easier if you organise it around four questions:
Who?
Population of a species.
Where?
Habitat.
What role?
Niche.
How does it change?
Births, deaths, immigration and emigration influence population size.
Population growth can be represented by different models depending on environmental conditions and resource availability.
📝 Practice Challenge
Try these without looking at the answers.
Physics
What did Rutherford's experiment demonstrate?
What are stationary orbits?
Write the quantisation condition for angular momentum.
What happens when an electron moves from a higher to a lower energy level?
How does Bohr radius depend on n?
Chemistry
What is the functional group of alcohols?
Why is phenol more acidic than ethanol?
What happens when an alcohol reacts with sodium?
What is Williamson synthesis?
What product can be formed by dehydration of an alcohol?
Biology
What is a habitat?
What is a niche?
What is a population?
What is mutualism?
Give one example of an abiotic factor.
🎯 NEET-Focused Study Strategy
Physics
For Atoms, use:
Concept → Energy-Level Diagram → Formula → Transition → MCQ
Practise:
Bohr model
Energy levels
Radius
Angular momentum
Atomic spectra
Hydrogen spectrum
Ionisation energy
Draw energy-level diagrams instead of relying only on memorisation.
Chemistry
For Alcohols, Phenols and Ethers, prepare a reaction map.
Alcohols
Preparation → Reactions → Oxidation → Dehydration
Phenols
Preparation → Acidity → Electrophilic substitution → Important reactions
Ethers
Preparation → Williamson synthesis → Cleavage
After learning each reaction, identify the reagent, condition and product.
Biology
For Organisms and Populations, create a comparison table:
Term
Meaning
Habitat
Place where an organism lives
Niche
Functional role of an organism
Population
Group of same-species individuals in an area
Community
Populations of different species living together
Ecosystem
Biotic community plus abiotic environment
This can make many NCERT-based MCQs easier.
🧠 Active Recall Challenge
Close the book and complete:
Physics
L = ______
hν = ______
rₙ ∝ ______
Chemistry
Alcohol functional group = ______
Phenol acidity is related to ______ stabilisation
Williamson synthesis → ______
Biology
Habitat → ______
Niche → ______
Population → ______
Mutualism → ______
If any answer is difficult to recall, mark that concept for revision.
📊 Error Analysis
After your MCQ practice, classify mistakes.
Error Type
Example
Concept
Confusing habitat and niche
Formula
Incorrect Bohr equation
Memory
Forgetting Williamson synthesis
Application
Choosing the wrong reaction product
Careless Reading
Missing a word such as “NOT”
This is more useful than simply counting the number of wrong answers.
The objective is to make the same mistake less likely next time.
🌟 Motivation
NEET preparation is not a race to finish chapters as quickly as possible.
It is a process of building:
Knowledge
→ Understanding
→ Recall
→ Application
→ Accuracy
→ Consistency
A student may initially make mistakes in a chapter.
That does not mean the chapter is permanently weak.
With proper revision, targeted practice and error analysis, performance can improve.
Do not fear mistakes. Study them.
A mistake that is understood and corrected can become one of the strongest lessons in your preparation.
🔄 Seven-Step Learning Cycle
1. Learn
Read and understand NCERT.
2. Recall
Close the book and reproduce the concept.
3. Practise
Solve MCQs.
4. Analyse
Find out why each mistake occurred.
5. Revise
Return to the relevant NCERT section.
6. Retest
Solve similar questions after some time.
7. Track
Record recurring weak areas.
Consistency beats irregular bursts of study.
📅 Suggested One-Day Plan
Physics
Atoms: 45–60 minutes
Concept revision
Energy-level diagrams
Formula revision
MCQs
Chemistry
Alcohols, Phenols and Ethers: 45–60 minutes
Reactions
Acidity
NCERT examples
MCQs
Biology
Organisms and Populations: 60–90 minutes
NCERT reading
Definitions
Population concepts
MCQs
Active recall
Final Review
Spend 20–30 minutes revising the mistakes made during the day.
The exact duration can be adjusted according to the student's school, coaching and overall study schedule.
⚠️ Important NEET Reminder
Do not depend completely on possible questions, expected questions or prediction lists.
A strong preparation should include:
NCERT + Official Syllabus + Previous-Year Questions + Mock Tests + MCQ Practice + Error Analysis + Repeated Revision
This series should be treated as additional practice material, not as a replacement for complete preparation.
⚠️ Disclaimer
This material is provided for educational and practice purposes only.
The questions in this series are not official NEET 2027 questions and should not be considered guaranteed predictions of the actual examination.
Students should follow the latest NCERT textbooks, official NEET syllabus, previous-year question papers and reliable educational resources.
Conclusion
Part 35 Focus
⚛️ Atoms
🧪 Alcohols, Phenols and Ethers
🧬 Organisms and Populations
Remember:
Learn → Recall → Practise → Analyse → Revise → Retest
Your progress should not be measured only by today's score.
Look at the larger picture:
Are your repeated mistakes decreasing?
Is your recall becoming faster?
Is your accuracy improving?
Are you understanding why an answer is correct?
Can you apply the concept to a new question?
One Concept → One Question → One Correction → One Improvement.
Every corrected mistake strengthens your preparation.
Every carefully revised NCERT concept strengthens your foundation.
Every analysed MCQ gives you another opportunity to improve.
🌟 Best wishes to every NEET 2027 aspirant.
Study consistently. Understand deeply. Practise intelligently. Analyse honestly. Revise repeatedly.
Your goal is not perfection in one day. Your goal is measurable improvement over time.
Written with AI
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