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Electrolysis of a solution of MnSO_(4) in aqueous sulphuric acid is a method for the preparation of MnO_(2) as per reaction, Mn_((aq.))^(2+)+2H_(2)O rarr MnO_(2(s))+2H_((aq))^(+)+H_(2(g)) Passing a current of 27 ampere for 24 hour gives one of MnO_(2) . Waht is the value of current efficiency ? Write the reaction taking place at the cathode the anode.

An electric toaster uses nichrome for its heating element. When a negligibly small current passes through it. It resistance at room temperature (27.0^@C) is found to be 75.3Omega . When the toaster is connected to a 230 V supply, the current settles, after a few seconds, to a steady value of 2.68 A . What is steady temperature of the nichrome element? The temperature coefficient of resistance of nichrome averaged over the temperature range involved , 1.70xx10^-4C^-1

The atomic weight of Al is 27 . When a current of 5F is passed through a solution of Al^(+++) ions, the qeight of AL deposited is.

What volume of hydrogen and oxygen would be obtained at 27^@C and 740 mm of Hg by passing a current of 25 amperes through acidulated water for 24 hours?

Electrolysis of an acetate solution produces ethane according to the Kolbe reaction : 2CH_(3)COO^(-) rarr C_(2)H_(6)+2CO_(2)+2e^(-) What volume of ethane is produced at 27^(@)C and 760 mm Hg, If a current of 0.5 ampere were passed through the solution for 7 hours and the electrode reaction is 82% efficient?