If dilute sulphuric acid is added to granular zinc, which of the following gases will form?

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SSC Matric Level Previous Paper (Held on: 6 Nov 2020 Shift 1)
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  1. Sulphur dioxide
  2. Oxygen
  3. Hydrogen sulfide
  4. Hydrogen

Answer (Detailed Solution Below)

Option 4 : Hydrogen
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Detailed Solution

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The correct answer is Hydrogen.

Key Points

  • When dilute sulphuric acid is poured on zinc granules, then zinc being more reactive than hydrogen displaces it from the acid and forms zinc sulphate and hydrogen gas. 
    • Zn + H2SO4 → ZnSO4 + H2.
  • Hydrogen is a combustible gas and burns with a popping sound.
  • This can be observed when a match stick that is burnt is bought ear to the test tube.

Additional Information

  • Hydrogen is the chemical element with the symbol H and atomic number 1. 
  • Hydrogen is the lightest element in the periodic table.
  • Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass.
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