NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

1 Hard

1 of 1

Application +4 | -1

Salts of

A

(atomic weight 7),

B

(atomic weight 27) and

C

(atomic weight 48) were electrolyzed under identical conditions using the same quantity of electricity. It was found that when 2.1 g of

A

was deposited, the weights of

B

and

C

deposited were 2.7 g and 7.2 g. The valencies of

A,B{\kern 1pt} \mathrm{and}{\kern 1pt} C

are respectively :

View answer and explanation

Correct option: B

1, 3 and 2

Option B (1, 3 and 2) is correct because the valencies are determined by comparing the ratios of deposited masses to atomic weights, based on Faraday's laws.

More Questions from ELECTRO CHEMISTRY

Practice All Chapter MCQs →

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?