NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

1 Medium

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Analyzing +4 | -1

Statement I: When iron rod is immersed in

\mathrm{NaCl}

solution such that half of its length is corroded and other half part when exposed to air is not corroded.

Statement II: Metal portion with less access to

\mathrm{O}_2

corrodes.

View answer and explanation

Correct option: A

If both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Option A is correct because Statement I and II are both true, and Statement II correctly explains why the iron rod corrodes more where it has less access to oxygen.

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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?