First slide

Crystal field theory

Question

The correct order for the wavelength of absorption in the visible region is

Moderate

A

[Ni(NO₂)₆]^4– < [Ni(NH₃)₆]²⁺ < [Ni(H₂O)₆]²⁺
B

[Ni(NO₂)₆]^4– < [Ni(H₂O)₆]²⁺< [Ni(NH₃)₆]²⁺
C

[Ni(H₂O)₆]²⁺ < [Ni(NH₃)₆]²⁺ < [Ni(NO₂)₆]^4–
D

[Ni(NH₃)₆]²⁺ < [Ni(H₂O)₆]²⁺ < [Ni(NO₂)₆]^4–

Solution

Frequency (energy) of light absorbed $\propto$ field strength of ligand
Wave length of light absorbed $\propto \frac{1}{field strength of ligand}$
$\begin{array}{l} field strength of {NO}_{2}^{-} > {NH}_{3} > H_{2} O \\ ∴' λ' absorbed {[Ni {({NO}_{2})}_{6}]}^{- 4} < {[Ni {({NH}_{3})}_{6}]}^{+ 2} < {[Ni {(H_{2} O)}_{6}]}^{+ 2} \end{array}$

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