In chromyl chloride, the number of d-electrons present on chromium is same as in:

(Given at. no. of Ti: 22, V: 23, Cr: 24, Mn: 25, Fe: 26)

Question

In chromyl chloride, the number of d-electrons present on chromium is same as in:

(Given at. no. of Ti: 22, V: 23, Cr: 24, Mn: 25, Fe: 26)

Canvas Classes · Accepted Answer

Step 1: d-electrons in Cr in chromyl chloride ()

Cr is in +6 state in .

Cr (Z=24) ground state: 
: remove all 6 valence electrons →

d-electrons in Cr(VI) = 0

Step 2: Find which option also has 0 d-electrons

| Species | Config | d-electrons |
|---------|--------|-------------|
| V(IV) = V⁴⁺ |  | 1 ✗ |
| Mn(VII) = Mn⁷⁺ |  | 0 ✓ |
| Fe(III) = Fe³⁺ |  | 5 ✗ |
| Ti(III) = Ti³⁺ |  | 1 ✗ |

Mn (Z=25):  → : remove all 7 valence electrons →

Answer: Option (2) — Mn(VII)

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