The first transition series metal 'M' has the highest enthalpy of atomisation in its series. One of its aquated ion () exists in green colour. The nature of the oxide formed by the above ion is:

Question

The first transition series metal 'M' has the highest enthalpy of atomisation in its series. One of its aquated ion () exists in green colour. The nature of the oxide formed by the above  ion is:

Canvas Classes · Accepted Answer

Step 1: Identify metal M

In the first transition series (Sc to Zn), enthalpy of atomisation values (kJ/mol):

| Metal |  (kJ/mol) |
|---|---|
| Sc | 378 |
| Ti | 473 |
| V | 515 |
| Cr | 397 |
| Mn | 281 |
| Fe | 418 |
| Co | 427 |
| Ni | 430 |
| Cu | 338 |
| Zn | 131 |

Vanadium (V) has the highest enthalpy of atomisation in the first transition series.

Step 2: Identify the green aquated ion

(, ) is green in aqueous solution. ✓

Step 3: Nature of oxide of

forms  (vanadium(III) oxide).

G

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