First slide

Covalent Bonding

Question

In an experiment, 𝑚 grams of a compound X (gas/liquid/solid) taken in a container is loaded in a balance as shown in figure I below. In the presence of a magnetic field, the pan with X is either deflected upwards (figure II), or deflected downwards (figure III), depending on the compound X.
Identify the correct statement(s)

Moderate

A

$If X is H_{2} O (l), deflection of the pan is upwards.$
B

$If X is K_{4} [Fe (CN)_{6}] (s), deflection of the pan is upwards.$
C

$If X is O_{2} (g), deflection of the pan is downwards.$
D

$If X is C_{6} H_{6} (l), deflection of the pan is downwards.$

Solution

Paramagnetic compound (X) are attracted towards magnetic field and the pan is deflected
downwards.
While the Diamagnetic compound (X) are repelled by magnetic field and pan is deflected upward.
(A) $X \Rightarrow H_{2} O \to$ Diamagnetic (correct)
(B) $X \Rightarrow K_{4} [Fe (CN)_{6}] (s) \to Diamagnetic (correct)$
$Here {Fe}^{2 +} + Strong field ligand \to 3 d^{6} \Rightarrow [t_{2} g^{6}, {eg}^{0}]$
$(C) X \Rightarrow O_{2} \to Paramagnetic (correct)$
Here O₂(g) is paramagnetic due to two-unpaired electrons present in $π$ * (antibonding orbitals).
$(D) X \Rightarrow C_{6} H_{6} (ℓ) \to Diamagnetic (Incorrect)$
It is due to presence of 0 unpaired electrons

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App