The first transition series metal ‘M’ has the highest enthalpy of atomisation in its series. One of its aquated ions () exists in green colour. The nature of the oxide formed by the above ion is :??[2025]

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Solution

Q.
The first transition series metal ‘M’ has the highest enthalpy of atomisation in its series. One of its aquated ions ( ${Mn}^{+}$ ) exists in green colour. The nature of the oxide formed by the above ${Mn}^{-}$ ion is : [2025]

1 neutral

2 acidic

3 basic

4 amphoteric

Ans.
(3)

In first transition series (3d series) Vanadium has highest enthalpy of atomization. $V^{3 +}$ is green in colour. Oxide formed by $V^{3 +}$ i.e. $V_{2} O_{3}$ is basic in nature.

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