Meta DescriptionNEET 2027 Part 64 presents NCERT-focused practice questions from Physics, Chemistry and Biology, covering Semiconductor Electronics, Aldehydes Ketones and Carboxylic Acids, and Human Health and Disease. Includes MCQs, quick revision, active recall, concept connections, error analysis, smart revision strategy and a seven-step study cycle.SEO KeywordsNEET 2027, NEET Preparation, NEET MCQs, NCERT, Semiconductor Electronics, Semiconductors, Diodes, Transistors, Aldehydes Ketones Carboxylic Acids, Organic Chemistry, Human Health and Disease, Immunity, Diseases, Biology MCQ, Physics MCQ, Chemistry MCQ, NCERT RevisionHashtags#NEET2027 #NEETPreparation #NEETMCQ #NCERT #Physics #Chemistry #Biology #NEETAspirants #NEETRevision #NEETPractice #Semiconductors #Diode #Transistor #OrganicChemistry #Aldehydes #Ketones #CarboxylicAcids #HumanHealth #Immunity

NEET 2027 Possible Questions Series — Part 64 | English Edition

NEET 2027 Possible Questions Series — Part 64

English Edition

Physics • Chemistry • Biology

NCERT Focus • Concept Building • MCQ Practice • Active Recall • Error Analysis

Meta Description

NEET 2027 Part 64 presents NCERT-focused practice questions from Physics, Chemistry and Biology, covering Semiconductor Electronics, Aldehydes Ketones and Carboxylic Acids, and Human Health and Disease. Includes MCQs, quick revision, active recall, concept connections, error analysis, smart revision strategy and a seven-step study cycle.

SEO Keywords

NEET 2027, NEET Preparation, NEET MCQs, NCERT, Semiconductor Electronics, Semiconductors, Diodes, Transistors, Aldehydes Ketones Carboxylic Acids, Organic Chemistry, Human Health and Disease, Immunity, Diseases, Biology MCQ, Physics MCQ, Chemistry MCQ, NCERT Revision

Hashtags

#NEET2027 #NEETPreparation #NEETMCQ #NCERT #Physics #Chemistry #Biology #NEETAspirants #NEETRevision #NEETPractice #Semiconductors #Diode #Transistor #OrganicChemistry #Aldehydes #Ketones #CarboxylicAcids #HumanHealth #Immunity

INTRODUCTION

NEET preparation becomes stronger when every chapter is studied through:

Concept → Recall → Question → Analysis → Revision → Retention

Part 64 focuses on:

Physics — Semiconductor Electronics

Chemistry — Aldehydes, Ketones and Carboxylic Acids

Biology — Human Health and Disease

These topics contain important definitions, reactions, properties, biological facts and conceptual relationships that can be tested through direct, conceptual and application-based MCQs.

The goal is not simply to memorize answers.

The goal is to understand the concept well enough to recognize it when the question is presented in a different way.

Part 64 Goals

Strengthen NCERT-based concepts

Practise important MCQs

Improve factual recall

Understand important reactions and relationships

Connect related concepts

Identify weak areas

Reduce repeated mistakes

Improve retention

Build examination confidence

Preparation Cycle

Read → Understand → Recall → Practise → Analyse → Revise → Retest

PHYSICS — SEMICONDUCTOR ELECTRONICS

MCQ Practice

Question 1

A semiconductor has electrical conductivity:

A. Greater than all conductors

B. Between that of conductors and insulators

C. Zero at all temperatures

D. Exactly equal to an insulator

Answer: B. Between that of conductors and insulators

Question 2

Which of the following is an intrinsic semiconductor?

A. Pure silicon

B. Silicon doped with phosphorus

C. Silicon doped with boron

D. Silicon doped with arsenic

Answer: A. Pure silicon

Question 3

Doping a pure semiconductor is done to:

A. Decrease its conductivity to zero

B. Increase and control its conductivity

C. Remove all charge carriers

D. Convert it into an insulator

Answer: B. Increase and control its conductivity

Question 4

In an n-type semiconductor, the majority charge carriers are:

A. Holes

B. Electrons

C. Protons

D. Neutrons

Answer: B. Electrons

Question 5

In a p-type semiconductor, the majority charge carriers are:

A. Electrons

B. Holes

C. Neutrons

D. Protons

Answer: B. Holes

Question 6

A p-n junction diode allows current to pass readily when it is:

A. Reverse biased

B. Forward biased

C. Unbiased only

D. Connected only to AC

Answer: B. Forward biased

Question 7

The depletion region of a p-n junction contains:

A. Only free electrons

B. Only free holes

C. Immobile ions and very few mobile charge carriers

D. Only neutrons

Answer: C. Immobile ions and very few mobile charge carriers

Question 8

A diode is commonly used as a:

A. Rectifier

B. Transformer core

C. Mechanical switch only

D. Heat engine

Answer: A. Rectifier

QUICK REVISION — PHYSICS

Semiconductors have conductivity between conductors and insulators.

Silicon and germanium are important semiconductor materials.

An intrinsic semiconductor is essentially a pure semiconductor.

Doping introduces controlled impurities into a semiconductor.

n-type semiconductor → electrons are majority carriers.

p-type semiconductor → holes are majority carriers.

A p-n junction forms when p-type and n-type regions are joined.

The depletion region contains immobile ions and has very few mobile carriers.

Forward bias reduces the depletion barrier and allows substantial current.

Reverse bias increases the depletion barrier.

A diode can be used for rectification.

Semiconductor devices are important components of electronic circuits.

Memory

n-type → Negative carriers → Electrons

p-type → Positive carriers → Holes

Concept Chain

Pure Semiconductor → Doping → p-type / n-type → p-n Junction → Diode → Rectification

CHEMISTRY — ALDEHYDES, KETONES AND CARBOXYLIC ACIDS

MCQ Practice

Question 1

The functional group of aldehydes is:

A. –OH

B. –CHO

C. –COOH

D. –NH₂

Answer: B. –CHO

Question 2

The functional group of ketones is:

A. –CO–

B. –CHO

C. –OH

D. –COOH

Answer: A. –CO–

Question 3

The functional group of carboxylic acids is:

A. –CHO

B. –COOH

C. –CO–

D. –O–

Answer: B. –COOH

Question 4

Oxidation of a primary alcohol generally produces first:

A. Ketone

B. Aldehyde

C. Ether

D. Amine

Answer: B. Aldehyde

Question 5

Oxidation of a secondary alcohol generally gives:

A. Aldehyde

B. Ketone

C. Carboxylic acid directly in all cases

D. Alkane

Answer: B. Ketone

Question 6

Which reagent is commonly used to distinguish aldehydes from ketones?

A. Tollens' reagent

B. Sodium chloride

C. Concentrated HCl only

D. Ammonia gas only

Answer: A. Tollens' reagent

Question 7

Aldehydes generally give a positive Tollens' test by producing:

A. Blue solution

B. Silver mirror

C. Green precipitate

D. Black gas

Answer: B. Silver mirror

Question 8

Carboxylic acids react with sodium bicarbonate to produce:

A. Hydrogen

B. Oxygen

C. Carbon dioxide

D. Nitrogen

Answer: C. Carbon dioxide

QUICK REVISION — CHEMISTRY

Aldehyde functional group → –CHO

Ketone functional group → >C=O

Carboxylic acid functional group → –COOH

Primary alcohol can be oxidised to an aldehyde.

Secondary alcohol can be oxidised to a ketone.

Aldehydes are generally more readily oxidised than ketones.

Tollens' reagent gives a characteristic silver mirror test with suitable aldehydes.

Carboxylic acids show acidic behaviour.

Carboxylic acids react with sodium bicarbonate to release CO₂.

Carbonyl chemistry is an important part of these compounds.

Learn important NCERT reactions, reagents and observations carefully.

Concept Connections

Primary Alcohol → Aldehyde → Carboxylic Acid

Secondary Alcohol → Ketone

Carboxylic Acid + NaHCO₃ → CO₂

Memory

Aldehyde → –CHO

Ketone → >C=O

Carboxylic Acid → –COOH

BIOLOGY — HUMAN HEALTH AND DISEASE

MCQ Practice

Question 1

Which organism causes malaria?

A. Plasmodium

B. Entamoeba

C. Ascaris

D. Wuchereria

Answer: A. Plasmodium

Question 2

The vector of malaria is:

A. Male mosquito

B. Female Anopheles mosquito

C. Housefly

D. Cockroach

Answer: B. Female Anopheles mosquito

Question 3

AIDS is caused by:

A. HIV

B. HBV

C. Plasmodium

D. Salmonella

Answer: A. HIV

Question 4

HIV primarily affects the immune system by attacking:

A. Red blood cells only

B. Helper T-lymphocytes

C. Platelets only

D. Bone cells

Answer: B. Helper T-lymphocytes

Question 5

Vaccination primarily helps the body by:

A. Destroying all cells

B. Developing immune memory

C. Preventing all mutations

D. Increasing body temperature permanently

Answer: B. Developing immune memory

Question 6

Which disease is caused by a bacterium?

A. Typhoid

B. Malaria

C. AIDS

D. Common cold caused by rhinoviruses

Answer: A. Typhoid

Question 7

Cancer is characterized by:

A. Controlled cell division only

B. Uncontrolled and abnormal cell growth

C. Complete absence of cells

D. Normal tissue repair only

Answer: B. Uncontrolled and abnormal cell growth

Question 8

Allergy is generally associated with:

A. An exaggerated immune response to certain substances

B. Complete absence of immunity

C. Only bacterial infection

D. Only viral replication

Answer: A. An exaggerated immune response to certain substances

QUICK REVISION — BIOLOGY

Human health depends on proper physical, mental and social well-being.

Diseases may be caused by pathogens, genetic factors, environmental factors and other causes.

Malaria is caused by Plasmodium.

Female Anopheles mosquito acts as the vector of malaria.

Typhoid is caused by a bacterium.

HIV causes AIDS.

HIV attacks important cells of the immune system, including helper T-lymphocytes.

Vaccination can stimulate immune memory.

Antibodies play an important role in humoral immunity.

Cancer involves uncontrolled abnormal cell growth.

Allergies involve exaggerated immune responses to particular substances.

Prevention, hygiene, vaccination and appropriate medical care are important components of disease control.

Key Distinctions

Malaria → Plasmodium → Female Anopheles

AIDS → HIV → Immune System

Vaccination → Immune Memory

Cancer → Uncontrolled Cell Growth

Allergy → Exaggerated Immune Response

ACTIVE RECALL

Close your book and answer the following questions from memory.

Physics

What is a semiconductor?

What is an intrinsic semiconductor?

Why is doping performed?

What are the majority carriers in an n-type semiconductor?

What are the majority carriers in a p-type semiconductor?

What is a p-n junction?

What is the depletion region?

What is the use of a diode as a rectifier?

Chemistry

What is the functional group of an aldehyde?

What is the functional group of a ketone?

What is the functional group of a carboxylic acid?

What does oxidation of a primary alcohol generally produce first?

What does oxidation of a secondary alcohol generally produce?

What is Tollens' reagent used for?

What observation is associated with a positive Tollens' test?

What gas is released when a carboxylic acid reacts with sodium bicarbonate?

Biology

What organism causes malaria?

Which mosquito transmits malaria?

What causes AIDS?

Which immune cells are particularly affected by HIV?

How does vaccination help immunity?

Name a bacterial disease.

What is a major characteristic of cancer?

What is an allergy?

Active Recall Rule

Answer from Memory → Check NCERT → Mark Recall Gap → Revise → Retest

If you cannot answer immediately, do not treat it as failure.

Treat it as a Recall Gap.

Then return to the relevant NCERT paragraph and test yourself again later.

CONCEPT CONNECTION

Physics

Semiconductor → Doping → Charge Carriers → p-n Junction → Diode → Electronic Application

Understanding this sequence makes semiconductor concepts easier to remember.

Chemistry

Alcohol → Oxidation → Carbonyl Compound → Further Oxidation

And:

Carboxylic Acid → Acidic Behaviour → Reaction with NaHCO₃ → CO₂ Evolution

Biology

Pathogen → Transmission → Disease → Immune Response → Prevention → Treatment

This framework helps connect disease-causing organisms with their transmission and control.

ERROR ANALYSIS

When you get an MCQ wrong, do not simply write the correct option.

Ask:

Why did I get it wrong?

1. Concept Error

The underlying concept was not understood.

2. Recall Error

You studied the fact but could not retrieve it.

3. Application Error

You knew the concept but could not apply it.

4. Formula/Reaction/Fact Error

A formula, reaction, reagent, definition or fact was incorrectly remembered.

5. Careless Error

You missed an important word, condition or option.

Error Log

Use:

Question → My Answer → Correct Answer → Why I Was Wrong → Correct Concept → Revision Date

Example

Wrong:

n-type semiconductor has holes as majority carriers.

Correct:

n-type semiconductor has electrons as majority carriers.

Reason:

Recall Error

Action:

Revise n-type and p-type carrier differences.

The purpose of an error log is not to collect mistakes.

The purpose is to stop the same mistakes from repeating.

SMART REVISION STRATEGY

Physics

Revision sequence:

Semiconductor → Intrinsic/Extrinsic → Doping → n-type/p-type → p-n Junction → Diode → Rectification

Focus on:

Semiconductor definition

Intrinsic semiconductor

Extrinsic semiconductor

Doping

Donor and acceptor concepts

n-type semiconductor

p-type semiconductor

Majority/minority carriers

p-n junction

Depletion region

Forward bias

Reverse bias

Diode applications

Memory

n-type → Electrons

p-type → Holes

Chemistry

Revision sequence:

Alcohols → Aldehydes → Ketones → Carboxylic Acids → Important Reactions

Focus on:

Functional groups

Nomenclature

Preparation

Physical properties

Chemical properties

Oxidation

Reduction

Tollens' test

Important reactions

Acidity of carboxylic acids

Reaction with sodium bicarbonate

Memory

–CHO → Aldehyde

>C=O → Ketone

–COOH → Carboxylic Acid

Biology

Revision sequence:

Disease → Pathogen → Transmission → Symptoms/Effects → Immunity → Prevention

Focus on:

Common diseases

Pathogens

Malaria

Typhoid

Pneumonia

AIDS

HIV

Immune system

Vaccination

Cancer

Allergies

Prevention and control

Memory

Malaria → Plasmodium → Female Anopheles

AIDS → HIV → Immune System

Vaccination → Immune Memory

MOTIVATION

NEET preparation is not about proving everything in one day.

It is about becoming slightly stronger every day.

One NCERT page can strengthen one concept.

One MCQ can expose one weakness.

One mistake can reveal one gap.

One correction can prevent a future mistake.

One revision can improve retention.

One retest can build confidence.

So remember:

Mistake → Analysis → Correction → Revision → Retest

If Physics feels difficult, break the chapter into smaller concepts.

If Chemistry reactions seem confusing, connect:

Reactant → Reagent → Product → Observation

If Biology contains too many facts, connect:

Cause → Mechanism → Effect → Prevention

Do not measure your preparation only by how much syllabus remains.

Measure it by how much you understand today that you did not understand yesterday.

One concept.

One question.

One correction.

One revision.

One step forward.

Keep going. 🌱📚

SEVEN-STEP STUDY CYCLE

Step 1 — Read

Read NCERT carefully.

Step 2 — Understand

Ask:

Why? How? What happens if the condition changes?

Step 3 — Recall

Close the book and reproduce the concept from memory.

Step 4 — Practise

Solve MCQs, numericals, reaction-based questions and application-based questions.

Step 5 — Analyse

Find the exact reason for every incorrect answer.

Step 6 — Revise

Return to the relevant NCERT paragraph, diagram, table, formula, reaction or fact.

Step 7 — Retest

Test yourself again after an interval.

Complete Cycle

Study → Understand → Recall → Practise → Analyse → Revise → Retest

The strength of preparation comes from repeating this cycle consistently.

IMPORTANT NEET REMINDER

Possible Questions are supplementary practice material.

Your core preparation should remain based on:

Latest Official NEET Syllabus

NCERT

Previous-Year Questions

Regular MCQ Practice

Mock Tests

Revision

Error Analysis

Official Examination Information

Do not depend on prediction material alone.

Use possible-question material as a tool for:

Test → Recall → Analyse → Revise → Improve

The objective is not to predict the exact future question paper.

The objective is to become capable of handling different question patterns from the same concepts.

DISCLAIMER

This is an independently prepared educational practice resource.

It is not the official NEET 2027 question paper.

No question in this article is guaranteed to appear in NEET 2027.

No person can reliably guarantee the exact questions of a future examination.

Students should prioritize the latest official syllabus, NCERT, Previous-Year Questions, mock tests, revision, error analysis and official examination information.

This material is intended for educational purposes such as:

Concept practice

MCQ practice

Active recall

Revision

Error correction

Retention

Examination preparation

Always verify the latest examination information through official sources.

KEY TAKEAWAYS

Physics — Semiconductor Electronics

Semiconductor conductivity lies between conductors and insulators.

Pure semiconductor → intrinsic semiconductor.

Doping changes and controls conductivity.

n-type → electrons are majority carriers.

p-type → holes are majority carriers.

p-n junction contains a depletion region.

Forward bias facilitates current flow.

Reverse bias increases the depletion barrier.

Diodes can be used for rectification.

Core Memory

n-type → Electrons

p-type → Holes

Chemistry — Aldehydes, Ketones and Carboxylic Acids

Aldehyde → –CHO

Ketone → >C=O

Carboxylic acid → –COOH

Primary alcohol → Aldehyde on controlled oxidation

Secondary alcohol → Ketone on oxidation

Aldehydes are generally more readily oxidised than ketones.

Tollens' test can give a silver mirror with suitable aldehydes.

Carboxylic acids react with NaHCO₃ and release CO₂.

Important reactions and reagents should be revised from NCERT.

Core Memory

Primary Alcohol → Aldehyde → Carboxylic Acid

Secondary Alcohol → Ketone

Biology — Human Health and Disease

Diseases may have infectious and non-infectious causes.

Malaria → Plasmodium.

Female Anopheles → malaria vector.

AIDS → HIV.

HIV affects important immune cells including helper T-lymphocytes.

Vaccination promotes immune memory.

Typhoid is a bacterial disease.

Cancer involves uncontrolled abnormal cell growth.

Allergy involves an exaggerated immune response.

Prevention and proper healthcare are important in disease control.

Core Memory

Malaria → Plasmodium → Female Anopheles

AIDS → HIV → Immune System

Vaccination → Immune Memory

FINAL REVISION CHECK

Physics

Semiconductor → Doping → Charge Carriers

n-type → Electrons

p-type → Holes

p-n Junction → Depletion Region

Forward Bias → Current Flow

Diode → Rectification

Chemistry

Primary Alcohol → Aldehyde → Carboxylic Acid

Secondary Alcohol → Ketone

–CHO → Aldehyde

>C=O → Ketone

–COOH → Carboxylic Acid

Carboxylic Acid + NaHCO₃ → CO₂

Biology

Pathogen → Transmission → Disease → Immune Response → Prevention

Plasmodium → Malaria

Female Anopheles → Malaria Vector

HIV → AIDS

Vaccination → Immune Memory

Cancer → Uncontrolled Cell Growth

CONCLUSION

Part 64 connects three important areas of NEET preparation.

Physics

Semiconductor → Doping → p-n Junction → Diode → Electronic Application

Chemistry

Alcohol → Oxidation → Aldehyde/Ketone → Carboxylic Acid → Chemical Reactions

Biology

Pathogen → Disease → Immunity → Prevention

The most important lesson is simple:

Understand → Remember → Apply → Analyse → Correct → Repeat

If you make a mistake:

Learn from it.

If you forget:

Revise it.

If the concept is difficult:

Break it into smaller pieces.

If you improve today by even a small amount, that improvement matters.

You do not need perfection every day.

You need consistent progress.

Final Study Cycle

Read → Understand → Recall → Practise → Analyse → Revise → Retest

Keep learning.

Keep practising.

Keep correcting.

Keep improving.

One concept at a time.

One question at a time.

One correction at a time.

One revision at a time.

One step closer to your goal.

Your consistency today can become your confidence tomorrow. 🌱📚

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Provide explanations for every answer

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