- 1(current)
Q. No.The reaction(s) involved in the preparation of potassium dichromate from iron chromite ore is/are:
| 1. | FeCr2O4 + NaOH + O2 → Na2CrO4 + Fe2O3 + H2O |
| 2. | Na2CrO4 + H2SO4 (conc.) → Na2Cr2O7 + Na2SO4 + H2O |
| 3. | Na2Cr2O7 + KCl→ K2Cr2O7 + NaCl |
| 4. | All of the above. |
Subtopic: Chemistry of Mn and Cr Compounds |
86%
From NCERT
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Subtopic: d-Block Elements- Properties & Uses | Chemistry of Mn and Cr Compounds |
73%
From NCERT
NEET - 2017
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The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution will be:
1. +2
2. +3
3. +4
4. +6
Subtopic: Chemistry of Mn and Cr Compounds |
64%
From NCERT
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Highest oxidation state of manganese in fluoride is +4 (Mn) but the highest oxidation state in oxides is +7 (Mn2O7). The reason is :
| 1. | Fluorine is more electronegative than oxygen. |
| 2. | Fluorine does not possess d orbitals. |
| 3. | Fluorine stabilizes lower oxidation state of Mn. |
| 4. | In covalent compounds, fluorine can only form a single bond while oxygen forms a double bond. |
Subtopic: Chemistry of Mn and Cr Compounds |
67%
From NCERT
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- 1(current)
Q. No.
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