Redox Reactions...

All combustion reactions, which make use of elemental dioxygen, as well as other reactions involving elements other than dioxygen are

In the reaction HAsO₂ + Sn²⁺ As + Sn⁴⁺ + H₂O, the oxidising agent is

Acidified KMnO₄ oxidises oxalic acid to CO₂. What volume (in litres) of 10^-4 M KMnO₄ is required to completely oxidise 0.5 L of 10^-2 M oxalic acid in acidic medium?

The standard values of A, B and C are +0.68 V, -2.54 V and -0.50 V, respectively. Which of the following statements is correct in context to the given data?

Which of the following reactions involves both oxidation and reduction?

The oxidation number of oxygen in most compounds is

Equivalent mass of oxidising agent in the reaction SO₂ + 2H₂S 3S + 2H₂O is

The highest value of oxidation number changes from 1 to 7

For Zn²⁺/Zn = - 0.76 V, Cl₂/Cl^- = 1.36 V, H⁺/1/2H₂ = 0 V and Fe³⁺/Fe²⁺ = 0.77 V, the increasing order of strengths as a reducing agent is

_{^{Consider the reaction between potassium permanganate and a metal sulphite represented as follows.}}



Which of the following options about the process is correct?

The oxidation number of sulphur in H₂S₂O₈ is

The oxidation number of phosphorus in HP₂O₇⁻ ion is

KMnO₄ is a strong oxidising agent in the acidic medium. To provide acidic medium, H₂SO₄ is used instead of HCl. This is because

What would happen when a small quantity of H₂O₂ is added to a solution of FeSO₄? 

Formation of coloured solution is possible when metal ion in the compound contains

The standard reduction potentials of Fe⁺²/Fe and Cu⁺²/Cu electrodes are -0.44 and 0.34 volts, respectively.
Which of the following statements is true?

The oxidation potential values of A, B, C and D are -0.03 V, +0.108 V, -0.07 V and +0.1 V, respectively. The non-spontaneous cell reaction takes place between

In which of the following reactions does H₂O₂ act as a reducing agent?

The E^o M³⁺/M²⁺ values for Cr, Mn, Fe and Co are -0.41, +1.57, +0.77 and +1.97 V, respectively. For which of these metals is the change in oxidation state from +2 to +3 the easiest?

Aurous chloride and auric chloride are written as Au(l)Cl and Au(lll)Cl₃.The roman numeral in parenthesis after the symbol of the metal in the molecular formula represents the