Practice Laws of Chemical Combination - 3.1 | 3. Atoms and Molecules | CBSE 9 Science
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Academics

Grades

Grade 8 Grade 9 Grade 10 Grade 11 Grade 12

Curriculum

CBSE ICSE IB
Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Professional Courses
Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

games
Typing
Memory
Math
English Adventures
Knowledge

3.1 - Laws of Chemical Combination

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does the Law of Conservation of Mass state?

💡 Hint: Think about how mass behaves in a closed system.

Question 2

Easy

Give an example of a compound with a constant composition.

💡 Hint: Recall the components of water!

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does the Law of Conservation of Mass state?

  • Mass can be created
  • Mass is destroyed
  • Mass is conserved in reactions

💡 Hint: Think about the behavior of mass in a closed container.

Question 2

True or False: The ratio of elements in a compound can change based on the method of preparation.

  • True
  • False

💡 Hint: Recall the examples of fixed ratios for compounds.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A student conducts an experiment where 12 g of sodium reacts with chlorine gas to produce sodium chloride. If the mass of sodium chloride produced is 17 g, what mass of chlorine was consumed in the reaction?

💡 Hint: Use the Law of Conservation of Mass!

Question 2

In a closed system, 15 g of carbon and 40 g of oxygen react to form carbon dioxide. If the total mass of products is found to be 54 g, is the reaction in accordance with the Law of Conservation of Mass? Explain.

💡 Hint: Check whether the total mass before equals the total mass after the reaction.

Challenge and get performance evaluation