JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank Topic Test - Electrochemistry

3F of electricity passes through three electrolytic cells connected in series containing \[A{{g}^{+}},C{{a}^{2+}}\] and \[A{{l}^{3+}}\] ions, respectively. The molar ratio in which the three metal ions are liberated at the electrodes is

A) 1 : 2 : 3

B) 2 : 3 : 1

C) 6 : 3 : 2

D) 3 : 4 : 2

Correct Answer: C

Solution :

[c] 1 Eq of \[A{{g}^{+}}:1\] Eq of \[C{{a}^{2+}}:1\] Eq of \[A{{l}^{3+}}\]

1 mol of \[A{{g}^{2+}};\frac{1}{2}\] mol of \[C{{a}^{2+}};\frac{1}{3}\] mol of \[A{{l}^{3+}}\]

\[\therefore \] mole ratio is \[1:\frac{1}{2}:\frac{1}{3}=6:3:2\]