NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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When an aqueous solution of lithium chloride is electrolysed using graphite electrodes :

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Correct option: A

pH of the resulting solution increases

Option A (pH of the resulting solution increases) is correct because during electrolysis of aqueous lithium chloride, hydrogen gas is produced at the cathode, leading to an increase in hydroxide ion concentration and thus an increase in pH.

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4.5 g of Al (at. mass 27 amu) is deposited at cathode from

A{l^{3 + }}

solution by a certain quantity of charge. The volume of

{H_2}

produced at STP from

{H^ + }

ions in solution by the same quantity of charge will be : The correct order of molar conductivity at infinite dilution of

\mathrm{LiCl},{\rm{NaCl {\kern 1pt}{\kern 1pt}and {\kern 1pt}{\kern 1pt}KCl}}

is A solution of copper sulphate

\left(\mathrm{CuSO}_4\right)

is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at the cathode (at. mass of Cu = 63 u) is The desired amount of charge for obtaining one mole of Al from

\mathrm{A}{\mathrm{l}^{3 + }}

is Which are used as secondary reference electrodes? Which one is correct?