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
