Given below are two statements :
Statement (I) : Among 3d series transition metals lowest enthalpy of atomization is of Mn.
Statement (II) : Chromate ion in presence of conc. $H_{2} SO_{4}$ forms $C rO_{3}$ .
In the light of the above statements, choose the correct answer from the options given below.

Question

Given below are two statements :

Statement (I) : Among 3d series transition metals lowest enthalpy of atomization is of Mn.

Statement (II) : Chromate ion in presence of conc. $H_{2} SO_{4}$ forms $C rO_{3}$ .

In the light of the above statements, choose the correct answer from the options given below.

TestHub · Accepted Answer

Statement (I) is true: Mn has a half-filled d⁵ configuration, which reduces metallic bonding strength, leading to the lowest enthalpy of atomization among 3d metals.

Statement (II) is true: Chromate ions ( $C r O_{4}^{2 -}$ ) react with concentrated $H_{2} S O_{4}$ to form chromium trioxide ( $C r O_{3}$ ), a red precipitate.

$C r O_{4}^{2 -} + 2 H^{+} ⟶ H_{2} C r O_{4} ⟶ C r O_{3} + H_{2} O$

Both statements are correct.

Chemistry - Complete d-block Question with Solution | TestHub

Options:

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JEE Main 2028 (Class 11)