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NEET2009ChemistryElectrochemistryActual

Al ₂ O ₃ is reduced by electrolysis at low potentials and high currents. If 4.0 10^4 amperes of current is passed through molten Al ₂ O ₃ for 6 hours, what mass of aluminium is produced ? (Assume 100 % current efficiency, at. mass of Al =27 ~g ~mol ⁻¹ ) -

Options

  1. A1.3 10^4 ~g
  2. B9.0 10^3 ~g
  3. C8.1 10^4 ~g
  4. D2.4 10^5 ~g

Correct answer

C. 8.1 10^4 ~g

Step-by-step solution

aligned W & = E 96500 I t W & = 9 96500 4.0 10^4 6 3600 & =8.1 10^4 ~g aligned

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