Question 10 — Analyse Fig. 8.24. Identify - Questions at the end of the chapter - Chapter 8 Class 8 - Nature of Matter: Elements, Compounds (Curiosity)

Last updated at July 13, 2026 by

Q 10
Question

Analyse Fig. 8.24. Identify Gas A. Also, write the word equation of the chemical reaction. (Iron filings are placed in a test tube with dilute hydrochloric acid, and a gas labelled Gas A is collected.)

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Answer
Gas A is hydrogen gas.

Explanation

  • Iron reacts with dilute hydrochloric acid.
  • It forms iron chloride and hydrogen gas.
  • Hydrogen is colourless and burns with a pop sound.
Word equation: Iron + Dilute hydrochloric acid → Iron chloride + Hydrogen gas.
← Back to concept: 8.3.2 Compounds
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