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12th Chemistry weekly Test - 1 ( Coordination Chemistry )

St. Britto Hr. Sec. School - Madurai

12th Chemistry weekly Test - 1 ( Coordination Chemistry )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Predict the geometry and hybridisation of Fe(Co)₅
Trigonal planar, dsp³

Trigonal bipyramidal, dsp³

Square planar dsp²

Octahedral d²sp³
The total number of electrons donated by ligands to platinum ion in [Pt(en)₂CI₂] is
8

10

12

14

The name of complex ion, [Fe(CN)₆]^3-is

Trieyanoferrate (III) ion
Hexacyano iron (III) ion
Hexacyanitoferrate (III) ion
Hexacyanido ferrate (III) ion

Among the following complexes the one which shows zero crystal field stabilisation energy is

[Mn(H₂O)₆]³⁺
[Fe(H₂O)₆]³⁺
[CO(H₂O)₆]²⁺
[CO(H₂O)₆]³⁺

The ligand capable of coordinating in two or more ways with the central metal ion are called ___________ ligands.

didentate
tridentate
ambidentate
none of the above

According to IUPAC, No is ______________

nitro
nitrosyl
nitrato
nitrito

In an octahedral complex, the (n-1) d orbital are involved in hybridization. The complex is called _______________ complex

inner orbital
low spin
spin paired
all the above

IUPAC name of the complex K₃[Al(C₂O₄)₃] is

potassiumtrioxalatoaluminium(III)
tassiumtrioxalatoaluminate(II)
potassiumtrisoxalatoaluminate(III)
potassiumtrioxalatoaluminate(III)

Pick out the central metal ion in the complex K₃[AI(C₂O₄)₃].

3K⁺
Al³⁺
C₂O₄^2-
both (a) and (b)

A binary solid A+B- has a structure with B^- ions constituting the lattice and A⁺ ions occupying 25% tetrahedral holes. Formula of the solid is

A₂B
AB₂
AB
AB₄

The isomerism exhibited by the complexes [Co(NH₃)₆] [Cr(CN)₆] and [Cr(NH₃)₈] [CO(CN)₆] is_________

Geometrical
Coordination
linkage
ionisation

Part - B

Generic 2 - Answer All Question

Name the type of isomerism that occurs in complexes in which both cation and anion are complex ions.

[Co(NH₃)₆]³⁺ is diamagnetic where as [CoF₆]^3- is paramagnetic explain.

What is a central atom or ion?
What are Ionisation isomers?

What are stereoisomers?

Draw all possible geometrical isomers of the complex [Co(en)₂]⁺ and identify the optically active isomer.

Part - C

Generic 3 - Answer All Question

Draw and explain the structure of Cisplatin.
Give one test to differentiate [Co(NH₃)₅Cl]SO₄ and [Co(NH₃)₅SO₄]Cl.

Explain optical isomerism.

What is \(\pi \) back bonding?

Draw the structure of the following homoleptic metal carbonyl.
(i) [Ni(CO)₄]
(ii) [Fe(CO)₅]
(iii) [Cr(CO)₆]

[Ni(CN)₄]^2- is diamagnetic, while [NiCl₄]^2- is paramagnetic , explain using crystal field theory.

Part - D

Generic 5 - Answer All Question

Discuss briefly the nature of bonding in metal carbonyls

What is crystal field splitting energy?

Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
(i) K[Cr(H₂O)₂(C₂O₄)₂] (ii) [Co(en)₃]CI₃ (iii) [Co(NH₃)₅(NO₂)](NO₃)₂
(iv) [Pt (NH₃)(H₂O)CI₂]
Give the postulates and limitation of Werner's theory of co-ordination compounds.

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