NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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Given below are two statements.
Statement I The limiting molar conductivity of

KCl

(strong electrolyte) is higher compared to that of

C{H_3}COOH

(Weak electrolyte).
Statement II Molar conductivity decreases with decrease in concentration of electrolyte.
In the light of the above statements, choose the most appropriate answer from the options given below.

View answer and explanation

Correct option: D

Both Statement I and statement II are false.

The correct answer is D. Statement I is false because strong electrolytes like KCl have higher limiting molar conductivity than weak electrolytes like CH3COOH. Statement II is false because molar conductivity increases with a decrease in concentration, especially for weak electrolytes.

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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 When an aqueous solution of lithium chloride is electrolysed using graphite electrodes : Which are used as secondary reference electrodes?