Question

Assetion : The green manganate is paramagnetic but the pruple permanganate is diamagnetic in nature.
Reason : `MnO_(4)^(2-)` contains on upaired electron while in `MnO_(4)^(-)` all electrons are paried.
A. If both assetion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer 1

Correct Answer - A
Assertion: Correct statement and reason is correct explanation of assertion.
Green `rarr MnO_(4)^(-) - [Ar]^(18) 3 d^(1) 4 s^(0)`, there is one upaired electron, so paramagnetic.
Purple `rarr MnO_(4)^(2-) - [Ar]^(18) 3 d^(0) 4s^(0)`, here all electrons are paried, so diamagnetic.