Single Choice

Among the following, the species that is both paramagnetic and coloured is :

A$$[MnO_{4}]^{2-}$$
Correct Answer
B$$[TiCl_{6}]^{2-}$$
C$$[VO_{4}]^{3-}$$
D$$CrO_{2}Cl_{2}$$

Solution

$$[MnO_{4}]^{2-}$$ Mn is in +6 oxidation state. Electronic configuration is $$[Ar]^{18}3d^{1}4s^{0}.$$ As it contains one unpaired electron it is paramagnetic and green coloured because of d-d transition in visible region. $$[ TiCl_{6}]^{2-}$$ , $$[VO_{4}]^{3}$$, $$[MnO_{4}]$$ and $$CrO_{2}Cl_{2}$$ are diamagnetic because all electrons are paired.

SIMILAR QUESTIONS

Coordination Compounds

What is the relationship between observed color of the complex and the wavelength of light absorbed by the complex?

Coordination Compounds

The colourless species is:

Coordination Compounds

Which of the following compound is expected to be colourless?

Coordination Compounds

Which of the following compounds is not colored yellow?

Coordination Compounds

Which of the following statements is/are correct?

Coordination Compounds

Which of the following is correct about $$\underset{I}{KFe^{II}[Fe(CN)_6]}$$ and $$\underset{II}{KFe^{III}[Fe(CN)_6]}$$ complex compounds?

Coordination Compounds

If $$MCl_2$$ salt is white, then comment on colour of its iodide salt.

Coordination Compounds

Choose incorrect statement.

Coordination Compounds

Why a solution of $$[Ni(H_2O)_6]^{2+}$$ is green while a solution of $$[Ni(CN)_4]^{2-}$$ is colourless? (At no. of $$Ni=28$$)

Coordination Compounds

Answer the following question: $$[Ni(H_2O)_6]^{2+}$$ is green whereas $$[Ni(CN)_4]^{2-}$$ is colourless. Why? (At no. of $$Ni=28$$)

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