The charge required to liberate 112 ml of hydrogen from acidified water is
0.1 F
2 F
965 C
96500 C
The amount of chlorine evolved, when 2 A of current is passed fro 30 minutes in an aqueous solution of NaCl will be
1.32 g
4.56 g
9.82 g
12.6 g
A smuggler could not carry gold by depositing iron on the gold surface, because
iron rusts
gold is denser
gold has lower standard reduction potential than iron
gold has higher standard reduction potential than iron
A Daniell cell is represented as Zn(s) + Cu2+(aq) →ºCu(s) + Zn2+(aq). The value of standard free energy change in the cell is (Eºcell = 1.1V),
300 kJ
-300 kJ
212.3 kJ
-212.3 kJ
The mass of copper deposited from a solution of CuSO4 by passing a current of 5 A for 15 min is (Atomic Wt. of copper = 63.5)
2.96 g
1.48 g
1.87 g
2.89 g
The e.m.f of a galvanic cell with electrode potentials of silver equal to + 0.80 V and that of copper equal to + 0.34 V is
-0.46 V
-1.14 V
+0.46 V
+ 1.14 V
The best conductor of electricity is a 0.1 M solution of
boric acid
acetic acid
sulphuric acid
propionic acid
If specific conductance and conductance of a solution is same, then its cell constant is equal to
0
1
10
100
The amount of mercury deposited by passing 300 C of charge through mercurous sulphate solution is (Take atomic weight of mercury as 200)
0.2 g
0.4 g
0.6 g
0.8 g
For standard reduction potentials of three metals A, B and C are +0.5 V, -3.0 V and -1.2 V respectively. The reducing powers of these metals are
B > C > A
A > B > C
C > B > A
A > C > B
