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Q. No.The oxidation states of the central atom in the given species are, respectively:
| 1. | 0 and +6 | 2. | +3 and +4 |
| 3. | +4 and +2 | 4. | +5 and +6 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyKI3, H2S4O6
The oxidation numbers of iodine and sulphur in the above compounds are, respectively:
1. \(\dfrac{1}{3}\) ; 4
2. 2.5 ; \(\dfrac{1}{3}\)
3. \(-\dfrac{1}{3}\) ; 2.5
4. 2.5 ; 3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe oxidation state of P in is-
| 1. | +3 | 2. | +4 |
| 3. | +2 | 4. | +5 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | Due to manganese being in its highest oxidation state in MnO₄²⁻. |
| 2. | Due to manganese being in its highest oxidation state in MnO₄⁻ |
| 3. | Because the disproportionation reaction of MnO₄²⁻ is endothermic. |
| 4. | Because the disproportionation reaction of MnO₄²⁻ is exothermic. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following reactions does not involve disproportionation process?
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | In the presentation \( \mathrm{E}_{\mathrm{Fe}^{3+}}^{\ominus} /_{ \mathrm{Fe}^{2+}}\) \( \text { and } \mathrm{E}_{\mathrm{Cu}^{2+}}^{\ominus} / _{\mathrm{Cu}^{\prime}} \mathrm{Fe}^{3+} / \mathrm{Fe}^{2+} \) and\(\text { } \mathrm{Cu}^{2+} / \mathrm{Cu}\) are reodox couples. |
| Reason (R): | A redox couple is the combination of the oxidised and reduced forms of a substance involved in an oxidation or reduction half cell. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe oxidation number of sulphur and nitrogen in H2SO5 and NO3- are respectively-
| 1. | +6, +5 | 2. | -6, -6 |
| 3. | +8, +6 | 4. | -8, -6 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following reactions does not represent a redox change?
1. CaCO3 CaO + CO2
2. 2H2 + O2 2H2O
3. Na + H2O NaOH + \(\frac{1}{2}\)H2
4. MnCl3 MnCl2 + \(\frac{1}{2}\)Cl2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFluorine reacts with ice as per the following reaction
H2O(s) + F2(g) → HF(g) + HOF(g)
This reaction is a redox reaction because-
| 1. | F2 is getting oxidized. | 2. | F2 is getting reduced. |
| 3. | Both (1) and (2)
|
4. | None of the above. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich element exhibits both positive and negative oxidation states?
1. Cs
2. Ne
3. I
4. F
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