Question 1 — Consider the following reaction where - Questions at the end of the chapter - Chapter 8 Class 8 - Nature of Matter: Elements, Compounds (Curiosity)

Last updated at June 17, 2026 by

Q 1
Question

Consider the following reaction where two substances, A and B, combine to form a product C: A + B → C. Assume that A and B cannot be broken down into simpler substances by chemical reactions. Based on this information, which of the following statements is correct?

  • (i) A, B, and C are all compounds and only C has a fixed composition.
  • (ii) C is a compound, and A and B have a fixed composition.
  • (iii) A and B are compounds, and C has a fixed composition.
  • (iv) A and B are elements, C is a compound, and has a fixed composition.
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Answer
Option (iv) is correct.

Explanation

  • A and B cannot be broken down, so they are elements.
  • They combine chemically to form a new product C.
  • So C is a compound formed from elements.
  • A compound has a fixed composition.
A and B are elements; C is a compound with a fixed composition.
← Back to concept: 8.3.2 Compounds
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