Q.

Two amperes of current is passed through acidulated water for ‘t’ seconds to decompose 18 grams of water . Value of ‘t’ is equal to

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answer is 2.

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Detailed Solution

At anode 2H2O→4H++4e-+O2At cathode [2H2O+2e-→H2+2OH-]×2Net reaction 2H2O→4F2H2+O236g H2O require 4F 18g H2O require 2F Q=it 2×96500=2×t t=96500 seconds

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