Question

Given below are two statements :
Statements I: Potassium permanganate on heating at 573 K forms potassium manganate.

Statement II : Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.

In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both statement I and statement II are false
• B. Both statement I and statement II are true
• C. Statement I is true but statement II is false
• D. Statement I is false but statement II is true

Answer 1

The correct option is C Statement I is true but statement II is false

$KMn{O}_4$ on heating dissociates as

Both permanganate and manganate are trtrahdral but only manganate is paramagnetic.

$\stackrel{+7}{Mn}:3d^{0}4s^0$ Diamagnetic

$\stackrel{+6}{Mn}:3d^{1}4s^0$ Paramagnetic

$\therefore$ Statement I is true but statement II is false.