Oxidation Number & Redox Reactions: JEE Questions & Solutions

MnO₄²⁻, in acidic medium, disproportionates to:

Consider the reactions: 1. NaCl+K₂Cr₂O₇+H₂SO₄ → A +... 2. A + NaOH → B +... 3. B + H₂SO₄+H₂O₂ → C +... In the product 'C', X is the number…

The oxidation state of chromium in the final product formed in the reaction between KI and acidified K₂Cr₂O₇ solution is:

200 cc of x × 10⁻³ M potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's salt solution in acidic medium. Here x = _____.

X and Y are the number of electrons involved, respectively during the oxidation of I⁻ to I₂ and S²⁻ to S by acidified K₂Cr₂O₇. The value of…

500 mL of 1.2 M KI solution is mixed with 500 mL of 0.2 M KMnO₄ solution in basic medium. The liberated iodine is titrated with standard…

Consider the following reactions: The oxidation states of Cu in Z and Q, respectively are:

The species which does not undergo disproportionation reaction is:

The incorrect statements among the following is:

Which of the following oxidation reactions are carried out by both K₂Cr₂O₇ and KMnO₄ in acidic medium? A. I⁻ → I₂ B. S²⁻ → S C. Fe²⁺ → Fe³⁺…

KMnO₄ acts as an oxidising agent in acidic medium. 'X' is the difference between the oxidation states of Mn in reactant and product. 'Y' is…

The reaction Zn + H₂SO₄ → ZnSO₄ + H₂ is an example of:

From the given list, the number of compounds with +4 oxidation state of Sulphur is: SO₃, H₂SO₃, SOCl₂, SF₄, BaSO₄, H₂S₂O₇

Which of the following cannot function as an oxidising agent?

1 mole of PbS is oxidized by “X” moles of O₃ to get “Y” moles of O₂. X + Y = ?

Chlorine undergoes disproportionation in alkaline medium as shown below: aCl₂(g) + bOH⁻(aq) → cClO⁻(aq) + dCl⁻(aq) + eH₂O(l) The values of…

2MnO₄⁻ + b I⁻ + c H₂O → x I₂ + y MnO₂ + z OH⁻ If the above equation is balanced with integer coefficients, the value of z is.

Total number of species from the following which can undergo a disproportionation reaction: H₂O₂, ClO₃⁻, P₄, Cl₂, Ag, Cu⁺, F₂, NO₂, K

Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from:

The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is.

H₂O₂ acts as a reducing agent in:

Sum of oxidation states of bromine in bromic acid and perbromic acid is.

During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the…

The reaction: 2IO₃⁻ + xI⁻ + 12H⁺ → 6I₂ + 6H₂O What is the value of x?

The difference in the oxidation state of Xe between the oxidised product of Xe formed on complete hydrolysis of XeF₄ and XeF₄ is

In alkaline medium, the reduction of permanganate anion involves a gain of electrons.

The correct group of halide ions which can be oxidized by oxygen in acidic medium is

See the following chemical reaction: Cr₂O₇²⁻ + XH⁺ + 6Fe²⁺ → YCr³⁺ + 6Fe³⁺ + ZH₂O The sum of X, Y and Z is.

During water-gas shift reaction

The total change in the oxidation state of manganese involved in the reaction of KMnO₄ and potassium iodide in acidic medium is