Question

Molecules/ions and their magnetic properties are given below.

Molecule/ion		Magnetic property
(i)	$C _{6} H _{6}$	(1)	Antiferromagnetic
(ii)	$CrO _{2}$	(2)	Ferrimagnetic
(iii)	$MnO$	(3)	Ferromagnetic
(iv)	$Fe _{3} O _{4}$	(4)	Paramagnetic
(v)	$Fe ^{3+}$	(5)	Diamagnetic

The correctly matched pairs in the above is

• A. $i-5, i i-3, iii- 2, iv -1, v-4$
• B. $i -3, ii -5, iii -1, iv -4, v -2$
• C. $i -5, ii -3, iii -1, iv -2, v -4$
• D. $i -5, ii -3, iii -1, i v-4, v -2$

Answer 1

Answer: (C)

$C _{6} H _{6}$ is diamagnetic $( i -5)$

$CrO _{2}$ is ferromagnetic $(ii - \left.3\right)$

$MnO$ is antiferromagnetic $(iii - 1)$

$Fe _{3} O _{4}$ is ferrimagnetic $(iv - 2)$

$Fe ^{3+}$ is paramagnetic with 5 unpaired electrons $( v -4)$