S Block Elements Question 9

Question 9 - 29 January - Shift 1

The magnetic behaviour of $Li_2 O, Na_2 O_2$ and $KO_2$, respectively, are

(1) diamagnetic, paramagnetic and diamagnetic

(2) paramagnetic, paramagnetic and diamagnetic

(3) paramagnetic, diamagnetic and paramagnetic

(4) diamagnetic, diamagnetic and paramagnetic

Show Answer

Answer: (4)

Solution:

Formula: Magnetic nature

$Li_2 O \to O^{2-} \to$ diamagnetic

$Na_2 O_2 \to O_2{ }^{2-} \to$ diamagnetic

$KO_2 \to O_2{ }^{-} \to$ paramagnetic