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NEET2007ChemistryElectrochemistryActual

4.5 g of aluminium (Atomic mass 27 amu) is deposited at cathode from Al ³⁺ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H ⁺ ions in solution by the same quantity of electric charge will be

Options

  1. A22.4 L
  2. B44.8 L
  3. C5.6 L
  4. D11.2 L

Correct answer

C. 5.6 L

Step-by-step solution

From second law of Faraday m_ Al m_ H = E_ Al E_ H 4.5 m_ H = 27 / 3 1 or m_ H =0.5 ~g 2 ~g H ₂ volume at STP =22.4 ~L 0.5 ~g H ₂ volume at STP = 22.4 0.5 2 ~L =5.6 ~L

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