The oxyacid of phosphorus, in which phosphorus has the lowest oxidation state, is
Options
(a) metaphosphoric acid (b) pyrophosphoric acid (c) orthophosphoric acid (d) hypophosphorus acid
Correct Answer:
hypophosphorus acid
Explanation:
No explanation […]
The oxidation number of nitrogen in (N₂H₅)⁺ is
Options
(a) -2 (b) 2 (c) 3 (d) -3
Correct Answer:
-2
Explanation:
No explanation available. Be the first to write the explanation for this […]
If KMnO₄ is reduced by oxalic caid, in an acidic medium, then oxidation number of Mn changes from
Options
(a) 4 to 2 (b) 7 to 2 (c) 6 to 4 (d) 7 […]
The oxidation state of S in H₂SO₄ is
Options
(a) 2 (b) 4 (c) 6 (d) 7
Correct Answer:
6
Explanation:
No explanation available. Be the first to write the explanation for this […]
The oxidation states of S atoms in S₄O₆²⁻ from left to right respectively
Options
(a) 6,0,0,6 (b) 3,1,1,3 (c) 5,0,0,5 (d) 4,1,1,4
Correct Answer:
5,0,0,5
Explanation:
No explanation available. Be the first to […]
Oxidation state of Fe in Mohr’s salt is
Options
(a) 1 (b) 2 (c) 3 (d) 4
Correct Answer:
2
Explanation:
No explanation available. Be the first to write the explanation for this […]
An example of redox reaction
Options
(a) AgNO₃ + NaCl → AgCl + NaNO₃ (b) CuSO₄ + 4NH₃ → Cu(NH₃)₄ SO₄ (c) H₂ + Cl₂ → 2HCl (d) KNO₃ + NaCl → KCl […]
The number of electrons involved in the reduction of one nitrate ion to hydrazine is
Options
(a) 8 (b) 5 (c) 3 (d) 7
Correct Answer:
7
Explanation:
No explanation available. Be the […]
Which of the following is redox reaction
Options
(a) 2CuSO₄ + 4KI → Cu₂I₂ + 2K₂SO₄ + I₂ (b) SO₂ + H₂O → H₂SO₃ (c) Na₂SO₄ + BaCl₂ → [Cu(NH₃)₄]SO₄ (d) CuSO₄ + […]
What is the equivalent mass of IO₄⁻ when it is converted into I₂ in acid medium
Options
(a) M/6 (b) M/7 (c) M/5 (d) M/4
Correct Answer:
M/7
Explanation:
No explanation available. Be […]
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