EdzyEdzy
AI Tutor
CBSE AI TutorStep-by-step CBSE study help for Classes 6-12.
WhatsApp TutorGet AI tutor help directly on WhatsApp.
CBSE
Class 6CBSE Class 6 subjects and study material.EnglishMathematicsHindiUrdu
Class 7CBSE Class 7 subjects and study material.EnglishMathematicsHindiUrdu
Class 8CBSE Class 8 subjects and study material.EnglishMathematicsHindiUrdu
Class 9CBSE Class 9 subjects and study material.EnglishMathematicsHindiUrdu
Class 10CBSE Class 10 subjects and study material.EnglishMathematicsHindiUrdu
Class 11CBSE Class 11 subjects and study material.EnglishMathematicsHindiUrdu
Class 12CBSE Class 12 subjects and study material.EnglishMathematicsHindiUrdu
Play
DuelChallenge another student in a quick learning duel.
RumbleJoin live academic competitions and leaderboards.
BadgesTrack milestones and learning achievements.
Get AppDownload Edzy for faster access on mobile.
Schools
Inter-School ChampionshipExplore Edzy's school championship.
School InstitutionBrowse schools and institutions.
State Wise SchoolFind schools by state.
District Wise SchoolFind schools by district.
Resources
StudyStudy ToolsCalculatorPlanners
ContentBlogsNews Article
CompareEdzy vs GPTEdzy vs GeminiEdzy vs Others
Buy
SearchDownload AppLogin
EdzyEdzy

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
  • Chrome Extension

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.

CBSE
Class 9
Science
Exploration
Atomic Foundations of Matter
Question Bank

When balancing a chemical equa...

Single Answer MCQ
Q-00172157

When balancing a chemical equation, which of the following must be conserved?

1

Only energy

2

Only mass of products

3

Mass of both reactants and products

4

None of the above

Previous QuestionNext Question

Video Explanation

Answer

Solution:

Watch Video Solution

Login to get access

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 does the Law of Constant Proportions state?

Single Answer MCQ
View explanation
Q2.

Which of the following is an example of the Law of Constant Proportions?

Single Answer MCQ
View explanation
Q3.

What does the Law of Conservation of Mass state?

Single Answer MCQ
View explanation
Q4.

What is the mass ratio of hydrogen to oxygen in water according to the Law of Constant Proportions?

Single Answer MCQ
View explanation