Mole Concept & Stoichiometry Practice for NEET

Topic-wise NEET practice on mole concept and stoichiometry. Solve calculation-based MCQs with stepwise solutions, tips for speed and chapter revision notes.

Mole Concept and Stoichiometry Revision Guide for NEET Chemistry

Mole Concept and Stoichiometry is part of NEET Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

Use the sample MCQs on this page to check understanding, then attempt the related ChemNexa tests for broader practice. When an answer is wrong, review the explanation and return to the underlying concept before attempting another set.

Important Topics

Core definitions and principles
Important equations or relationships
Common applications and examples
Frequently confused concepts
Exam-style multiple-choice questions
Error review and targeted revision

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for Mole Concept and Stoichiometry, then test recall with mixed MCQs.

What to practise in Mole Concept and Stoichiometry

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Mole Concept and Stoichiometry before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for NEET Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 5 Mole Concept and Stoichiometry MCQs with Answers

These public questions are selected from the exact Mole Concept and Stoichiometry chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

NEET Chemistry · Mole Concept and Stoichiometry · Very Very Hard

1. 9 g H2O contains how many moles?

A. 0.5 mol
B. 9 mol
C. 1 mol
D. 2 mol

Answer: A

Explanation: M(H2O)=18 g mol^-1; n=9/18=0.5 mol.

NEET Chemistry · Mole Concept and Stoichiometry · Very Very Hard

2. 5.6 L O2 at STP is approximately:

A. 2 mol
B. 0.5 mol
C. 1 mol
D. 0.25 mol

Answer: D

Explanation: At conventional STP, 22.4 L corresponds to 1 mol.

NEET Chemistry · Mole Concept and Stoichiometry · Very Very Hard

3. For 2H2+O2→2H2O, 3 mol H2 requires:

A. 6 mol O2
B. 1.5 mol O2
C. 0.75 mol O2
D. 3 mol O2

Answer: B

Explanation: H2:O2=2:1, so 3 mol H2 needs 1.5 mol O2.

NEET Chemistry · Mole Concept and Stoichiometry · Very Very Hard

4. A 90% pure 20 g sample contains pure material:

A. 2 g
B. 9 g
C. 18 g
D. 20 g

Answer: C

Explanation: Pure mass=0.90×20=18 g.

NEET Chemistry · Mole Concept and Stoichiometry · Very Very Hard

5. If theoretical yield is 20 g and actual yield 15 g, percent yield is:

A. 133.3%
B. 75%
C. 25%
D. 80%

Answer: B

Explanation: %yield=15/20×100=75%.