Elements and CompoundsPractice Questions & MCQs
Practice Elements and Compounds questions from Is Matter Around Us Pure (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Elements and CompoundsQuiz - Solve & Score
Q1. A chemist studies the formula of washing soda, Na2CO3. How many DIFFERENT elements are chemically combined in Na2CO3?
- A.4
- B.5
- C.2
- D.3
Answer: D. 3
Count the DIFFERENT element symbols in the formula (the small numbers count atoms, not new elements). Na2CO3 contains sodium, carbon and oxygen, which is 3 different elements.
Q2. A student writes the formula of sulphuric acid, H2SO4. How many DIFFERENT elements are chemically combined in H2SO4?
- A.3
- B.4
- C.5
- D.2
Answer: A. 3
Count the DIFFERENT element symbols in the formula (the small numbers count atoms, not new elements). H2SO4 contains hydrogen, sulphur and oxygen, which is 3 different elements.
Q3. A teacher draws the formula of nitric acid, HNO3. How many DIFFERENT elements are chemically combined in HNO3?
- A.4
- B.5
- C.3
- D.2
Answer: C. 3
Count the DIFFERENT element symbols in the formula (the small numbers count atoms, not new elements). HNO3 contains hydrogen, nitrogen and oxygen, which is 3 different elements.
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Where can I practise Elements and Compounds questions for Class 9 Science?
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Are these Elements and Compounds questions important for the exam?
Yes. These Elements and Compounds important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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Every Elements and Compounds question on RankByte comes with the correct answer and a full step-by-step solution, so you learn the concept instead of just guessing.