JEE Main 2018 (Offline) | Hydrogen Question 77 | Chemistry

Hydrogen peroxide oxidises [Fe(CN)₆]^4- to [Fe(CN)₆]^3- in acidic medium but reduces [Fe(CN)₆]^3- to [Fe(CN)₆]^4- in alkaline medium. The other products formed are, respectively :

H₂O and (H₂O + OH^-)

(H₂O + O₂) and H₂O

(H₂O + O₂) and (H₂O + OH^-)

H₂O and (H₂O + O₂)

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MCQ (Single Correct Answer)

-1

Out of Syllabus

In which of the following reactions, hydrogen peroxide acts as an oxidizing agent ?

HOCl + H₂O₂ $$ \to $$ H₃O⁺ + Cl^$$-$$ + O₂

I₂ + H₂O₂ + 2OH^$$-$$ $$ \to $$ 2I^$$-$$ + 2H₂O + O₂

2Mn$$O_4^ - $$ + 3H₂O₂ $$ \to $$ 2 MnO₂ + 3O₂ + 2H₂O + 2OH^$$-$$

PbS + 4H₂O₂ $$ \to $$ PbSO₄ + 4H₂O

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MCQ (Single Correct Answer)

-1

Out of Syllabus

Identify the reaction which does not liberate hydrogen :

Reaction of zinc with aqueous alkali.

Electrolysis of acidified water using Pt electrodes.

Allowing a solution of sodium in liquid ammonia to stand.

Reaction of lithium hydride with B₂H₆.

JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

Identify the incorrect statement regarding heavy water :

It reacts with Al₄C₃ to produce CD₄ and Al(OD)₃ .

It is used as a coolant in nuclear reactors.

It reacts with CaC₂ to produce C₂D₂ and Ca(OD)₂ .

It reacts with SO₃ to form deuterated sulphuric acid (D₂SO₄).

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