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NEET2018ChemistryElectrochemistryActual

Time taken to completely decompose 36 ~g of water by passing 3 ~A current is

Options

  1. A35.8 hr
  2. B40 hr
  3. C51.8 hr
  4. D22.5 hr

Correct answer

A. 35.8 hr

Step-by-step solution

2 H ₂ O 2 H ₂+ O ₂36 ~g 2 moles of H ₂ O 4 moles of e⁻ s 4 ~F of charge is required for complete decomposition. Now, Q=I t aligned t= Q I = 4 96500 3 & =128666 sec & = 128666 3600 =35.8 hr aligned

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