MCQ
Jahn-Teller effect is not observed in high spin complexes of
  • A
    $d^7$
  • $d^8$
  • C
    $d^4$
  • D
    $d^9$

Answer

Correct option: B.
$d^8$
b
Jahn teller effect: This is geometric distortion that occurs in unsymmetrical octahedral complexes for example high spin complexes of (high spin)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

In the reaction sequence :

$\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,O} \\ 
  {\,\,\,\,\,\,\,\,||} \\ 
  {C{H_3} - C - H} 
\end{array}$ $\mathop {\xrightarrow{{HCN}}}\limits_{\mathop O\limits^\Theta  H} (A)\mathop {\xrightarrow{{{H_2}O/{H^ \oplus }}}}\limits_\Delta  $ Product

Product will be :

An organic compound $‘A’$ has the molecular formula ${C_3}{H_6}O,$ it undergoes iodoform test. When saturated with dil. $HCl$ is gives $‘B’$ of molecular formula ${C_9}{H_{14}}O$. $A$ and $B$ respectively are
Given below are two statements:

Statement $(I)$ : In the Lanthanoids, the formation of $\mathrm{Ce}^{+4}$ is favoured by its noble gas configuration.

Statement $(II)$ : $\mathrm{Ce}^{+4}$ is a strong oxidant reverting to the common $+3$ state.

In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following is oxidised in air
By the action of enzymes, the rate of biochemical reaction
Reduction of acetyl chloride with ${H_2}$ in presence of  $Pd$  gives
$\begin{array}{*{20}{c}}
  {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {Et - {\text{ }}O - {\text{ }}C - {\text{ }}O - {\text{ }}Et\xrightarrow[{(2){H_3}{O^ \oplus }}]{{\left( 1 \right){\text{ }}C{H_3}MgBr\,\,\left( {excess} \right)}}(A),} 
\end{array}$

 Product $(A)$ is 

Gas that can not be collected over water is
Consider the following reaction

(image) $\xrightarrow[{Pd - BaS{O_4}}]{{{H_2}}}\,A$

The product $A$ is

 Molarity of liquid HCl will be, if density of solution is 1.17 gm/cc.