CBSE Class 10 Science Competency Based Questions

Practise original CBSE Class 10 Science competency based questions across all 13 chapters, with MCQs, assertion-reason, case studies, answers and worked solutions for Physics, Chemistry and Biology.

ChapterTopic

Question 1MCQ · Analyse · 1 mark

Chemical Reactions and Equations · Types of chemical reactions

A clean iron nail is placed in blue copper sulphate solution. A reddish-brown coating forms and the solution becomes pale green. Which explanation fits both observations?

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Question 2MCQ · Analyse · 1 mark

Chemical Reactions and Equations · Decomposition reactions

White silver chloride turns grey in sunlight. What does this show?

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Question 3MCQ · Analyse · 1 mark

Chemical Reactions and Equations · Balanced equations

A student balances aluminium reacting with oxygen to form aluminium oxide. Which coefficient set conserves both elements?

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Question 4MCQ · Analyse · 1 mark

Chemical Reactions and Equations · Precipitation reactions

Clear aqueous barium chloride and sodium sulphate solutions are mixed. A white insoluble solid forms. Identify it.

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Chapter-wise Science competency questions

Open a chapter for all its questions, answers and worked solutions.

Chemical Reactions and Equations Acids, Bases and Salts Metals and Non-metals Carbon Compounds Life Processes Control and Coordination How do Organisms Reproduce?Heredity Light: Reflection and Refraction The Human Eye and the Colourful World Electricity Magnetic Effects of Electric Current Our Environment