Question

What is the highest possible oxidation state exhibited by manganese ?

• A. \(+8\)
• B. \(+5\)
• C. \(+6\)
• D. \(+7\)

Hint:

Manganese uses all 7 valence electrons (3d5 4s2) to show +7.

Answer 1

The Correct Option is D

Step 1: Count:
Valence electrons of Mn: 5 in 3d and 2 in 4s, total 7.

Step 2: Examples:
Permanganate has Mn at +7. The state +8 never occurs for Mn because no electron is left beyond group number 7.

Step 3: Answer:
Option (D).

Final Answer:
Option (D). \[ \boxed{\text{(D) } +7} \]