Of the following reaction, only one is a redox reaction.Identify this reaction
Options
(a) Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O (b) 2S₂O₇²⁻ + 2H₂O → 2SO₄²⁻ + 4H⁺ (c) BaCl₂ + MgSO₄ […]
Which of the following is a disproportionation reaction
Options
(a) 2Cu⁺ → Cu²⁺ + Cu (b) Cu → Cu⁺ (c) Cl₂ → 2Cl⁻ (d) 2Mg + O₂ → 2MgO
Correct Answer:
2Cu⁺ → […]
The oxidation number of sulphur is -1 in
Options
(a) FeS (b) FeS₂ (c) 2NaO – S = O₂ (d) 2NaO – S₂ = O₂
Correct Answer:
FeS₂
Explanation:
No explanation available. Be […]
In which of the following compounds manganese has oxidation number equal to that of iodine in KIO₄
Options
(a) Potassium manganate (b) potassium permanganate (c) Manganous chloride (d) Manganese chloride
Correct Answer:
potassium […]
A 2.5 mol sample of N₂H₄ loses 25 mol of electrons in being converted to a new compound X, Assuming that all of the nitrogen appears in the new compound, what is the oxidation state […]
In acidic medium, the equivalent weight of KMnO₄ is
Options
(a) M/6 (b) M/5 (c) M/4 (d) M/3
Correct Answer:
M/5
Explanation:
No explanation available. Be the first to write the explanation for […]
In the following change,KMnO₄ → MnO₂, the oxidation state of Mn changes as
Options
(a) 7 → 4 (b) 5 → 2 (c) 7 → 5 (d) 3 → 7
Correct Answer:
7 […]
If HNO₃ changes into N₂O, the oxidation number is changed by
Options
(a) 0 (b) 6 (c) 2 (d) 4
Correct Answer:
4
Explanation:
No explanation available. Be the first to write the […]
Equivalent weight of KMnO₄ in basic medium is (mol.wt. of KMnO₄ = 158)
Options
(a) 31.5 (b) 52.67 (c) 79 (d) 158
Correct Answer:
52.67
Explanation:
MnO₄⁻ + 2H₂O + 3e⁻ → MnO₂ […]
The oxidation state of halogen atom is ‘+3’ in
Options
(a) ClO₂ (b) Cl₂O₃ (c) Cl₂O₆ (d) I₂O₅
Correct Answer:
Cl₂O₃
Explanation:
No explanation available. Be the first to write the explanation for […]
2017 Copyright Doctor Dreams Training Academy