- 1(current)
Q. No.Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below.
| Statement I: | Heating NaCl with concentrated \(H_2SO_4\) and \(MnO_2\) results in oxidation of Mn. |
| Statement II: | Heating NaI with concentrated \(H_2SO_4\) and \(MnO_2\) results in reduction of Mn. |
In light of the above statements, choose the most appropriate answer from the options given below.
| 1. | Statement I is incorrect but Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct but Statement II is incorrect. |
Subtopic: Chemistry of Mn and Cr Compounds |
Level 4: Below 35%
NEET - 2026
Please attempt this question first.
Hints
Please attempt this question first.
The number of moles of \(\mathrm{MnO}_4^{-}\) being reduced to \(\mathrm{Mn}^{2+}\) under acidic conditions by \(4.517 \times 10^{24}\) electrons are:
| 1. | 1.5 moles | 2. | 7.5 moles |
| 3. | 2.5 moles | 4. | 5.0 moles |
Subtopic: Chemistry of Mn and Cr Compounds |
50%
Level 3: 35%-60%
NEET - 2024
Hints
The manganate and permanganate ions are tetrahedral, due to:
| 1. | The π-bonding involves the overlap of d-orbitals of oxygen with d-orbitals of manganese. |
| 2. | The π-bonding involves the overlap of p-orbitals of oxygen with d-orbitals of manganese. |
| 3. | Absence of π-bonding. |
| 4. | The π-bonding involves the overlap of p-orbitals of oxygen with p-orbitals of manganese. |
Subtopic: Chemistry of Mn and Cr Compounds |
77%
Level 2: 60%+
NEET - 2019
Hints
When neutral or faintly alkaline is treated with potassium iodide, iodide ion is converted into 'X'. 'X' is:
1.
2.
3.
4.
Subtopic: Chemistry of Mn and Cr Compounds |
78%
Level 2: 60%+
NEET - 2019
Hints
Subtopic: d-Block Elements- Properties & Uses | Chemistry of Mn and Cr Compounds |
73%
Level 2: 60%+
NEET - 2017
Hints
SO2 is passed through an acidified K2Cr2O7 solution.
The correct statement among the following regarding the above experiment is:
1. The solution gets decolorized.
2. SO2 gets reduced.
3. Green coloured Cr2(SO4)3 gets formed.
4. The solution turns blue.
Subtopic: Chemistry of Mn and Cr Compounds |
56%
Level 3: 35%-60%
NEET - 2016
Hints
In acidic medium, H2O2 changes Cr2O7–2 to CrO5 which has two (–O – O–) bonds.
The oxidation state of Cr in CrO5 is:
1. +5
2. +3
3. +6
4. -10
Subtopic: Chemistry of Mn and Cr Compounds |
77%
Level 2: 60%+
AIPMT - 2014
Hints
Considering the following reaction,
3 MnO 42– + 2 H 2 O ⇌ 2 MnO 4– + MnO 2 + 4 OH–
The reagent that facilitates the removal of OH– ions to ensure the completion of the conversion of K2MnO4 to KMnO4 is:
1. KOH
2. CO2
3. SO2
4. HCl
3 MnO 42– + 2 H 2 O ⇌ 2 MnO 4– + MnO 2 + 4 OH–
The reagent that facilitates the removal of OH– ions to ensure the completion of the conversion of K2MnO4 to KMnO4 is:
1. KOH
2. CO2
3. SO2
4. HCl
Subtopic: Chemistry of Mn and Cr Compounds |
Level 3: 35%-60%
AIPMT - 2013
Hints
- 1(current)
Q. No.
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