Edzy for Classes 6-12

Edzy is a personal AI tutor for CBSE and State Board students, with curriculum-aligned guidance, practice, revision, and study plans that adapt to each learner.

Email: always@edzy.ai
Phone: +91 96256 68472
WhatsApp: +91 96256 68472
Address: Sector 63, Gurgaon, Haryana

Follow Edzy

Browse by Class

CBSE Class 6
CBSE Class 7
CBSE Class 8
CBSE Class 9
CBSE Class 10
CBSE Class 11
CBSE Class 12

Explore the CBSE resource hub

Explore Edzy

Study Resources
Free Study Tools
Best Apps for Board Exams
Edzy vs ChatGPT
About Us
Why We Built Edzy
Blog
CBSE AI Tutor

Support & Legal

Help & FAQs
Accessibility
Privacy Policy
Terms & Conditions
Refund Policy
Cookie Policy
Site Directory

© 2026 Edzy. All rights reserved.

Curriculum-aligned learning paths for students in Classes 6-12.

CR

Question Practice

Which of the following is an example of a decomposition reaction?

Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.

MCQ_SA

Chemical Reactions and Equations

Which of the following is an e...

Single Answer MCQ

Q-00004403

Which of the following is an example of a decomposition reaction?

1

2H2 + O2 → 2H2O

2

CaCO3 → CaO + CO2

3

Zn + H2SO4 → ZnSO4 + H2

4

NaOH + HCl → NaCl + H2O

Previous Question Next Question

Keep Practising

Students who asked this also explored

Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.

Q1.

What is a chemical reaction and how do we know when it has taken place?

Single Answer MCQ

View explanation

Q2.

Explain the difference between physical and chemical changes in matter.

Single Answer MCQ

View explanation

Q3.

What is a chemical reaction and how do we know when it has taken place?

Single Answer MCQ

View explanation

Q4.

Explain the difference between physical and chemical changes in matter.

Single Answer MCQ

View explanation