[MnO_4^{2–}] Which one of the following ions exhibits d-d transition and paramagnetism as well?

Easy Tutorial

For Competitive Exams

☰

Aptitude

TNPSC G4

10th CBSE Maths

Which one of the following ions exhibits d-d transition and paramagnetism as well?

$MnO_4^-$

$Cr_2O_7^{2–}$

$CrO_4^{2–}$

$MnO_4^{2–}$

Explanation:

$CrO_4^{2-}\Rightarrow Cr^{6+}=\left[Ar\right]$
Unpaired electron (n) = 0; Diamagnetic
$Cr_2O_7^{2-}\Rightarrow Cr^{6+}=\left[Ar\right]$
Unpaired electron (n) = 0; Diamagnetic
$MnO_4^{2-}=Mn^{6+}=\left[Ar\right]3d^1$
Unpaired electron (n) = 1; Paramagnetic
$MnO_4^-=Mn^{7+}=\left[Ar\right]$
Unpaired electron (n) = 0; Diamagnetic

Additional Questions

Iron carbonyl, $Fe(CO)_5$ is	Answer
The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is	Answer
The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are	Answer
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations : a. $60 mL\dfrac{M}{10}HCL+40 mL\dfrac{M}{10} NaOH$ b. $55 mL\dfrac{M}{10}HCL+45 mL\dfrac{M}{10} NaOH$ c. $75 mL\dfrac{M}{5}HCL+25 mL\dfrac{M}{5} NaOH$ d. $100 mL\dfrac{M}{10}HCL+100 mL\dfrac{M}{10} NaOH$ pH of which one of them will be equal to 1?	Answer
On which of the following properties does the coagulating power of an ion depend?	Answer
Given van der Waals constant for $NH_3, H_2, O_2$ and $CO_2$ are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?	Answer
The solubility of $BaSO_4$ in water is 2.42 × $10^{–3} gL^{–1}$ at 298 K. The value of its solubility product $(K_{sp})$ will be (Given molar mass of $BaSO_4 = 233 g mol–1)$	Answer
In which case is number of molecules of water maximum?	Answer
The correct difference between first and second order reactions is that	Answer
Among $CaH_2, BeH_2 , BaH_2,$ the order of ionic character is	Answer

Share with Friends