Which of the following is the strongest oxidizing agent?
BrO3-/Br2+ ; Eo = + 1.50
Fe3+/Fe2+ ; Eo = + 0.76
MnO4-/Mn2+ ; Eo = + 1.52
Cr2O72-/Cr3+ ; Eo = + 1.33
In which of the following reaction, hydrogen is acting as an oxidizing agent?
with S to give H2S
with I2 to give HI
with Li to form LiH
with Cl to give HCl
Among the properties (a) reducing (b) oxidizing (c) complexing the set of properties shown by CN- ion towards metal species is
a, b
a, c
b, c
a, b, c
The standard e.m.f of a cell, involving one electron change is 0.591 V 25oC. The equilibrium constant of the reaction is (F = 96500 C-mol-1; R = 8.314 J - K-1 - mol-1)
1.0 × 101
1.0 ×105
1.0 ×1010
1.0 ×1030
In the reaction : 14 H+ + Cr2O72- + 3Ni → 2Cr3+ + 7H2O + 3Ni2+, which of the following substance is a reducing agent?
H2O
Ni
H+
Cr2O72-
H2O2 is
a catalyst
An oxidizing agent
A reducing agent
Both '2' and '3'
For the redox reaction : Zn(s) + Cu2+ (0.1 M) → Zn2+ (1 M) + Cu(s) taking place in a cell, Eo cell is 1.1 volt. Calculate the value of Ecell for the cell?
2.14 volt
1.80 volt
1.07 volt
0.82 volt
Which of the following reaction does not involve either in oxidation or reduction?
Cr → CrCl3
Na → Na+
2S2O32- → S4O62-
K2CrO4 → K2CrO7
The mass of copper deposited from a solution of Cu2S by passing a current of 2.5 ampere for 6 minute is
0.3 g
0.5 g
0.7 g
0.9 g
0.0352
0.0591
0.1183
0.2366
