Oxidation and Reduction Reactions

In oxidation process:

Which of the following is the most powerful oxidising agent?

In which of the following reactions, H₂O₂ acts as a reducing agent?

In the reaction, Ag₂O + H₂O₂ → 2Ag + H₂O + O₂, H₂O₂ ACT AS:

In Cu²⁺ + Ag → Cu + Ag⁺, oxidation half-reaction is:

In one of the following reactions, HNO₃ does not behave as an oxidising agent, identify it:

The equivalent weight of MnSO₄ is equal to its molecular weight when it is converted to:

Which of the following reactions, the underlined substance has been oxidised?

Which changes requires an oxidising agent?

Which of the following molecules can act as an oxidising as well as reducing agent?

Which of the following is a redox reaction?

According to classical concept, oxidation involves

What volume of 0.1 N oxalic acid solution can be reduced by 250 g of an 8 percent by weight KMnO₄ solution?

In the reaction, N₂ → NH₃. The eq. wt. of N₂ and NH₃ are respectively equal to:

A 0.518 g sample of lime stone is dissolved in HCl and then the calcium is precipitated as CaC₂O₄. After filtering and washing the precipitate, it requires 40.0 mL of 0.250 N KMnO₄ solution acidified with H₂SO₄ to titrate it as, MnO₂⁻+H⁺ + C₂O₄⁻→ Mn²⁺ + CO₂ + 2H₂O. The percentage of CaO in the sample is:

Which of the following statements is true?

In the following change, 3Fe + 4H₂O→ Fe₃O₄ + 4H₂. If the atomic weight of iron is 56, then its equivalent weight will be:

The oxidation number and covalency of sulphur in sulphur molecules (S₈) are:

Oxidation number of N in HNO₃ is:

In which of the following compounds, iron has an oxidation number of +3?

Oxidation states of Pin HP₂O₃, H₄P₂O₆, HP₂O₇, respectively are:

State the oxidation number of carbonyl carbon in methanal and methanoic acid respectively:

The oxidation number of cobalt in K[Co(CO)₄ ] is:

Oxidation number of iodine in 10₅⁻,I0₃⁻, KI and I₂ respectively are:

When sulphur dioxide is passed in an acidified K₂Cr₂O₇ solution, the oxidation state of sulphur is changed from:

Of the following other electronic configurations of atoms, the highest oxidation state is achieved by which one of them?

What is the oxidation state of P in Ba (H₂PO₂)₂?

When a manganous salt is fused with the mixture of KNO3 and the solid NaOH, the oxidation number of Mn changes from +2 to:

In acidic medium, H₂O₂ changes Cr₂O₇²⁻ to CrO₅ which has two (-O-O-) bonds. Oxidation state of Cr in CrO₅ is:

A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in oxidation number?

Which of the following have been arranged in the decreasing order of oxidation number of sulphur?

The oxidation states of S-atoms in S₄O₆²⁻ form left to right respectively are:

In the conversion of Br₂ to BrO₃⁻, the oxidation number of Br changes from:

The oxidation number of the sulphur atoms in peroxomono- sulphuric acid H₂SO₅ and peroxodisulphuric (H₂S₂O₈) respectively, are:

The average oxidation number of Fe in Fe₃O₄ is:

The reaction of aqueous KMnO₄ with H₂O₂ in acidic condition gives:

Carbon is in lowest oxidation state:

Oxidation state of phosphorus in pyrophosphoric acid is:

Oxidation state of nitrogen is correctly given for:

Oxidation number of 'N' in N₃H (hydrazoic acid) is:

Oxidation state of hydrogen in CaH, is-

The oxidation number of P is + 3 in-

In the reaction, 3Br₂+6CO₃ + 3H₂O → 5Br⁻ + BrO₃⁻+ 6HCO₃⁻ :

Which one of the following is not a redox reaction?

Which of following is not a redox change?

Which of the following halogens always shows only one oxidation state in compounds?

The compound in which oxidation state of metal is zero-

In a reaction, H2O + C → CO + H₂.

The oxidation number of chlorine in HOCl is-

Which one can act as oxidising & reducing agent both?

Which compound can not be used as oxidising agent?