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 Multiple Choice QuestionsLong Answer Type

181. What is crystal field splitting energy? How does the magnitude of Δ0 decide the actual configuration of d orbitals in a coordination entity?
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182. [Cr(NH3)6)3+ is paramagnetic while [Ni(CN)4]2 – is diamagnetic. Explain why?
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183.

Discuss the nature of bonding in metal carbonyls.

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 Multiple Choice QuestionsShort Answer Type

184.

Give the oxidation state, d-orbital occuptaion and coordination number of the central metal ion in the following complexes:
K3[Co(C2O4)3]

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185.

Give the oxidation state, d-orbital occuptaion and coordination number of the central metal ion in the following complexes:
cis-[Cr(en) 2Cl2]Cl

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186.

Give the oxidation state, d-orbital occuptaion and coordination number of the central metal ion in the following complexes:
(NH4)2[CoF4]

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187.

Give the oxidation state, d-orbital occuptaion and coordination number of the central metal ion in the following complexes:
[Mn(H2O)6SO4

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188.

Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration & coordination number, Also give stereochemistry and magnetic moment of the complex:
K[Cr(H2O)2(C2O4)2]. 3H2O


K[Cr(H2O)2(C2O4)2] 3H2

IUPAC: Potassium diaquadioxalatochromate (III) trihydrate.

Oxidation state = +3
Electronic configuration: 3d3 : t2g3.
sterochemistry :

Coordination number = 6
it have three unpaired electron therefore magnetic moment is calculated as :

[n(n+2)]1/2

where n= unpaired electron
[3(3+2)]1/2

[15]1/2 =4.80 B.M

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189.

Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration & coordination number, Also give stereochemistry and magnetic moment of the complex:
CrCl3(py)3

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190.

Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration & coordination number, Also give stereochemistry and magnetic moment of the complex:
Cs[FeCl4].

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