Coordination Compound

Question 1

Primary valency

Answer 1

Oxidation state.

Question 2

Secondary valency

Answer 2

Coordination number

Question 3

CFT could not explain?

Answer 3

Order of Spectorchemical series

Question 4

CFSE supports which type of stability?

Answer 4

Thermodynamic.

Question 5

Relations of CFSE and wavelength and strength of ligand

Answer 5

Inverse with wavelength and direct with strength of ligand.

Question 6

C2O4^2- is weak or strong

Answer 6

Can be both

Question 7

[Ni(CO)4] hybridisation

Answer 7

Sp3

Question 8

Reaction of cocl2+ 6H2O then with HCl conc.

Answer 8

[Co(H2O)6]cl2 (pink) and [CoCl]^2- (blue)

Question 9

Is cuso4.4NH3.H2O complex compound or double salt

Answer 9

Coordinate

Question 10

Nessler reagent

Answer 10

K2[HgI4]

Question 11

How are low oxidation state stabilised in complex

Answer 11

Synergic bonding (pi electron acceptor ligand)

Question 12

Symmetric and asymmetric configurations of electron

Answer 12

Either both t2 or e are singly or doubly filled

Question 13

Stabilisation energy of case of octahedral t2g and eg

Answer 13

T2g by -0.4 (stabilised) and eg by 0.6 ( destabilised)

Question 14

Copper tartarate complex

Answer 14

https://images.app.goo.gl/DeLtjHUDsKxC5iFj7

Question 15

A.Fe4[Fe(CN)6]3
B. K3[Co(NO2)6]
C.(NH4)3 [As(Mo3O10)4]
D. Fe3(OH)2 (OAc)6]cl
Define solubility

Answer 15

D is soluble and B poorly soluble. A is Prussian blue.

Question 16

Carnalite

Answer 16

KCl.MgCl2.6H2O

Question 17

Mohr’s salt

Answer 17

FeSO4.(NH4)2SO4.6H2O

Question 18

Alum

Answer 18

K2SO4.Al2(SO4)3.24H2O

Question 19

Is it true that metals except transition metals form coordination compounds

Answer 19

No chlorophyll makes an coordination compound with Magnesium from S Block as it’s central atom.

Question 20

Electrons from metals are shared to ligand in which orbital

Answer 20

Pi star orbital

Question 21

Which bond in synergic bonding is strong and weak

Answer 21

Metal bond with carbon is strong while carbon and oxygen bond is weak.

Question 22

Sigma bonded complex

Answer 22

Ligand contribute only one electron. Eg. RMgX

Question 23

Pi bonded complex

Answer 23

Organic ligand with metal eg. zeise’s salt and ferosene

Question 24

Hepticity

Answer 24

In pi complex the no. Of carbon atoms attached to central metal. For eg hepticity of ferosene is 5

Question 25

Structure of Mn2(CO)8

Question 26

Co2(CO)8

Question 27

Effect of no. Of rings on stability of compound

Answer 27

Directly.

Question 28

Which one is more stable among Ni(dmg)2 or cu(acac)2

Answer 28

Ni(dmg)2 since due to n bonding 4 rings are formed. Check out the structure.

Question 29

Is hydrazine mono or bidentent

Answer 29

Mono since to be bidentent it will form 3 member ring which will be highly unstable

Question 30

Structure of oxalate

Question 31

Formula of EAN

Answer 31

Atomic no.- oxidation no.+CN*2 (valid only for Carbonyls) to check stability

Question 32

Why are dx2- y2 and dz2 in eg

Answer 32

Electron of ligand approach from axis that’s why the e density increases on axis and it becomes unstable. While dxy and dyz and dzx are in lower energy ie t2g

Question 33

What is g in t2g and eg

Answer 33

Gerade; which is for azimuthal quantum no. 4 g

Question 34

Why is there splitting in eg and t2g of coordination compounds

Answer 34

Because of the approach of ligands

Question 35

CFSE in 5d 4d 3d

Answer 35

5d>4d>3d

Question 36

Relation of delta g and delta octahedral

Answer 36

Delta t= 4/9 delta o

Question 37

Delta sp and delta o

Answer 37

Delta sp= 4/3 delta o

Question 38

Higher splitting absorbs shorter or longer wavelength

Answer 38

Shorter wavelength

Question 39

John teller distortion

Answer 39

Unsymmetrical configuration d9 d7(low spin) and d4(high spin)

Question 40

For 4d and 5d which are strong field ligands

Answer 40

All since inbuilt splitting in high

Question 41

Compounds with carbonyl are_____ hybridised

Answer 41

Sp3

Question 42

Brown ring compound

Answer 42

[Fe(H2O)5NO+]SO4

Question 43

Structure of Fe(CO)5

Answer 43

Sandwich structure

Question 44

Is it true all ligands are e donors

Answer 44

No some ligands are electron acceptor pi acids

Question 45

Colour of [CoCl(NH3)5]2+

Answer 45

Violet

Question 46

[co(NH3)5(H2O)]3+

Answer 46

Red

Question 47

Colour of [Co(NH3)5(H2O)]3+

Answer 47

Yellow orange

Question 48

[co(CN)6]3-

Answer 48

Pale yellow

Question 49

Colourof [cu(H2O)4]2+

Answer 49

Blue

Question 50

Ti(H2O)6]3+ colour

Answer 50

Violet