Mole Concept Questions for NEET 2025 Exam: Mole Concept NEET Questions With Answer

Mole Concept Questions for NEET: The Mole Concept is very important for NEET Chemistry. It makes you understand things such as how much of a substance you possess and how it interacts with other substances. This concept is applied in numerous fields of chemistry.

To perform well in the NEET Exam, practice Mole Concept NEET questions. This will help you solve problems with ease and score well in Chemistry. Regular practice of the mole concept NEET previous year question paper will make you confident and prepared for the exam.

Why are Mole Concept Questions for NEET Important?

The mole concept is a bridge that lets you relate big things (such as grams) to small things (such as atoms). It's applied in lots of areas of chemistry, including:

1. Mixing Things: Knowing how much of each thing is in a mixture.

2. Chemical Reactions: Knowing how much of one thing becomes another.

3. Gases: Know how gases work.

NEET 2025: Biology: Mind Maps & Important Diagrams | Mock Test (Free)

NEET 2025: Syllabus | Most Scoring concepts | NEET PYQ's (2015-24)

New: Meet Careers360 experts in your city and get guidance on shortlisting colleges

New Programme: B.E. Environmental & Sustainability @ BITS Pilani for PCB Candidates

This Story also Contains

1. Why are Mole Concept Questions for NEET Important?
2. Types of Mole Concept Questions in NEET
3. Mole Concept NEET Previous Year Question Paper
4. How to Prepare for Mole Concept Questions
5. Common Mistakes to Avoid
6. Simple Tips for Success with Mole Concept NEET PYQ

Also Read:

• Best Chemistry Books For NEET 2025 Preparation

• NEET Chemistry Chapter Wise Weightage 2025

• How To Score 160 Plus in NEET 2025 Chemistry?

Types of Mole Concept Questions in NEET

The types of questions asked about the mole concept NEET previous year question paper are discussed below:

1. Straight Conversion Problems

These examine simple concepts of mole-particle-mass relationships:

1. Calculate atoms in 0.5 moles of oxygen

2. Determine the number of moles in 49g H2S04

Key Formula:

2. Concentration Calculations

Focus on molarity, molality, normality, and their interconversions.

Examples:

1. Find the molarity of 98% H2S04 (density = 1.84g/cc1.84g/cc).

2. Prepare 250ml 2MHNO3 from 70% concentrated acid.

Key Formula:

For molarity:

3. Stoichiometry and Limiting Reagents

These involve multi-step calculations using balanced chemical equations and mole ratios.

Examples:

1. Determine the mass of CaCO3 needed to produce 11gCO2

2. Identify the limiting reagent in N2+3H2→2NH3

Strategy:

Always verify mole ratios from the balanced equation before proceeding with calculations.

4. Empirical and Molecular Formulas

Combine mole concepts with percentage composition analysis.

Examples:

1. A compound contains 40% C, 6.67% H, and 53.33% O. Find its empirical formula.

2. Determine the molecular formula from combustion data.

Approach:

1. Convert percentages into moles.

2. Find the simplest whole-number ratio.

3. Use molar mass to derive the molecular formula.

5. Gas Law Applications

These integrate Avogadro’s law and ideal gas equations.

Examples:

1. Calculate the volume occupied by 2 moles O2 at STP.

2. Determine molar mass from gas density measurements.

For non-STP conditions:

At STP:

Where:

• P=Pressure (atm)

• P=Pressure (atm),

• V=Volume (L)

• V=Volume (L),

• n=Moles

• n=Moles,

• R=0.0821 L⋅atm/(mol⋅K)

• R=0.0821L⋅atm/(mol⋅K),

• T=Temperature (K)

• T=Temperature (K).

Mole Concept NEET Previous Year Question Paper

Given below are some mole concept NEET questions:

(2021 NEET)

1. Which of the following is the correct option for the right relationship between and for one mole of ideal gas?

Option 1:

Option 2:

Option 3:

Option 4:

Answer: The relation between for one mole of an ideal gas is given as

.

Hence, the answer is option (3).

2) The number of moles of electrons in 1 mole of NH₄⁺ is:

1. 10

2. 9

3. 8

4. 7

Answer: (2) 9

Explanation:

• Atomic numbers: N = 7, H = 1

• NH₄⁺ has (1N + 4H) = (7 + 4) = 11 electrons

• Since NH₄⁺ loses one electron, total electrons = 10 electrons per molecule

• For 1 mole of NH₄⁺, number of moles of electrons = 10 moles of electrons

Hence, the correct answer is option (2) 9 moles.

3) On applying repeated electric spark on 15 mL mixture of , it produced . For the process of combustion, 11 mL was needed. Calculate mole % off in the mixture. (All V are measured under similar conditions).

1. 5.3

2. 53.33

3. 4.667

4. 46.67

Answer: (2) 53.33

Explanation: The reactions involved are -

Let x mL be the volume of the 15 mL mixture

The total volume of required

Volume of

Mol % of

Hence, the answer is the option (2).

4) For a given 1 mole of ideal gas kept at 3.5 atm in a container at capacity 4.463 I , the Avagadro proportionality constant for the hypothesis (see figure) (NEET 20221)

1. 1)2.46

2. 1.275

3. 4.667

4. 46.67

Answer: 2)1.275

Explanation: According to Avogadro's hypothesis

$\mathrm{V}\alpha \mathrm{n}$

$V=\frac{n(RT)}{P}$

$\begin{array}{rl}& \text{ proportionality constant }=\frac{\mathrm{RT}}{\mathrm{p}}\\ & \text{ Using }{\mathrm{P}}_{\mathrm{v}}=\mathrm{nRT}\\ & \therefore \frac{\mathrm{RT}}{\mathrm{p}}=\frac{\mathrm{V}}{\mathrm{n}}=\frac{4.463}{3.5}=1.275\end{array}$

Hence, the answer is the option (2).

5) Assertion: The volume of a gas and the number of moles of gas have an inverse relationship, meaning that as the number of moles of gas increases, the volume of the gas will decrease, and vice versa.

Reason: The ratio by volume of gaseous reactants and products is in relation to their mole ratio.

1. Both assertion and reason are true, and the reason is the correct explanation of the assertion.

2. Both assertion and reason are true, but the reason is not the correct explanation of the assertion

3. The assertion is true, but the reason is false.

4. The assertion is false, but the reason is true.

Answer: 2) Both assertion and reason are true, but the reason is not the correct explanation of the assertion

Explanation: The assertion and reason both are correct and related to each other, but they are not directly dependent on each other. Let's break them down:

Assertion: The volume of a gas is inversely proportional to the number of moles of gas.

This assertion is correct according to Avogadro's Law, which states that, at a given temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas. In other words, as the number of moles of gas increases, the volume of the gas decreases proportionally, and vice versa.

Reason: The ratio by volume of gaseous reactants and products is in agreement with their mole ratio.

This reason is related to the stoichiometry of chemical reactions. The mole ratio of reactants and products in a balanced chemical equation determines the ratio of their volumes at a given temperature and pressure, assuming they are all gases. This is known as the Volume Ratio Law or Gay-Lussac's Law. Therefore, the ratio of volumes of gaseous reactants and products is in agreement with their mole ratio.

Overall, the assertion and reason are both correct and related, but the reason is not necessarily required to prove the assertion.

Hence, the answer is the option (2).

How to Prepare for Mole Concept Questions

Here are some steps to prepare from mole concept neet pyq:

Step 1: Understand the Basics

Know what a mole is and how to change from one unit to another.

Step 2: Practice Problems

Practice many mole concept neet pyq to become excellent at solving questions.

Step 3: Use mole concept NEET pyq

Solve Mole Concept NEET past years’ papers to understand what type of questions are being asked.

Step 4: Watch Video Lessons

Watch videos that define the mole concept in simple terms.

Common Mistakes to Avoid

Some common mistakes that need to be avoided while practising the mole concept neet pyq are:

1. Confusing Units: Ensure you understand the difference between molarity and molality.

2. Forgetting Avogadro's Number: Apply it only for particle counting while practising mole concept questions for NEET.

3. Not Checking for Limiting Reagents: Always observe which chemical is used up first in a reaction.

Simple Tips for Success with Mole Concept NEET PYQ

Here are some important tips while practising mole concept NEET questions:

1. Practice daily: Do a few mole concept questions for NEET daily.

2. Use Simple Language: Don't bother with difficult words; just understand.

3. Ask for Help: If you’re stuck, ask a teacher or friend.

Mastering the Mole Concept is important for NEET Chemistry. The practice of Mole Concept NEET questions consistently builds a good foundation. Solution of Mole Concept NEET previous year question papers (PYQs) provide an insight into key concepts and exam patterns. Through the practice of Mole Concept NEET PYQ, the accuracy and speed of solving problems can be enhanced. Work on clarity in concepts and try different Mole concept questions for NEET to build confidence. Revising regularly and doing mock tests will improve your performance in the exam.

Also Read:

• Most common mistakes to avoid during NEET preparation 2025

• Best books for NEET 2025 preparation

• How to prepare for NEET 2025 in 2 months