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Unit 1

Total questions: 40

Worksheet time: 40mins

Name
Class
Date
1.

MOT consider about

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

coordination bond

2.

Is a

a)

Aromatic

b)

Anti Aromatic

c)

non aromatic

d)

non of the above

3.

BMO is formed due to

a)

Constructive Interference

b)

Destructive Interference

c)

Different sign of wave function

d)

Both 2 & 3

4.

NBMO is formed due to

a)

Constructive Interference

b)

Destructive Interference

c)

Non matching symmetry

d)

Both 1 & 2

5.

Which orbital has nodal plane????

a)

BMO

b)

ABMO

c)

NBMO

d)

All of these

6.

Which is pie bond combination????

a)

2s-2s

b)

2s-2px

c)

2px-2px

d)

None of these

7.

If 3 AOS take part in bonding, they results in

a)

1 BMO , 2 ABM0

b)

3 NBMO

c)

1 BMO, 1 ABMO

d)

1 BMO, 1 ABMO, 1 NBMO

8.

For which of the follwoing hybridisation the bond angle is maximum?

a)

Sp2

b)

Sp

c)

Sp3

d)

dSp2

9.

Which among the following is diamagnetic?

a)

N2

b)

O2

c)

N22-

d)

O2-

10.

Which of the following statement is not correct from the view point of molecular orbital theory?

a)

Be2 is not a stable molecule

b)

He2 is not a stable molecule

c)

Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period.

d)

The order of energies of molecular orbitals in N2 molecule is

σ2s < σ* 2s < σ2pz < (π2pX = π2pY) < (π*2pX = π*2pY) < σ*2pz

11.

Which of the following pair is expected to have the same bond order?

a)

O2 , N2

b)

O2+, N2–

c)

O2 – , N2+

d)

O2–, N2–

12.

In which of the following molecules, σ2pz molecular orbital is filled before π2px and π2py molecular orbitals?

a)

O2

b)

C2

c)

N2

d)

B2

13.

Is a

a)

Aromatic

b)

Anti Aromatic

c)

Non Aromatic

d)

non of the above

14.

Which is not correct about BMO

a)

Wave function of AO are added

b)

AO overlap each other in a phase

c)

AO overlap each other in different phase

d)

electron density high near the nucleous

15.

Bond order of O2- is

a)

1

b)

1.5

c)

2

d)

2.5

16.

Bond order of NO is

a)

1

b)

1.5

c)

2

d)

2.5

17.

Every electron in the anti bonding molecular orbital makes its contribution to the ---------- of two combining atoms.

a)

Repulsion

b)

Attraction

c)

Stability

d)

Same sign

18.

σ 1s﹤ σ*1s﹤σ2s﹤σ*2s﹤[π2px=π2py]﹤σ2pz﹤[π*2px=π*2py]﹤ σ*2pz

a)

Applicable From H2 to N2

b)

Applicable From O2 to Ne2

19.

How many anti bonding electrons are in O2 molecule

a)

6

b)

4

c)

8

d)

2

20.

As the bond order increases ,

a)

Bond strengths increases

b)

Dissociationenergy increases

c)

Bond length decreases

d)

All

21.

-Ve or zero value of bond order means

a)

Molecule is unstable and exist

b)

Molecule is unstable and does not exist

c)

Molecule is stable and exist

d)

Molecule is stable and does not exist

22.

4n+2 rule is apply for

a)

MOT

b)

CFT

c)

Aromatic

d)

Nono Aromatic

23.

Which of the following complexes has maximum CFSE?

a)

K3[Fe(CN)6]

b)

K3[Co(Ox)3]

c)

K3[CoF6]

d)

K3[Co(CN)6]

24.

Which orbital is very important in CFT?

a)

orbital p

b)

orbital s

c)

orbital d

25.

When the ligands move along the x, y and z axes of d orbital in metal ion (octahedral geometry), they approach directly toward or between the lobes. Name the d orbitals that feel less repulsion?

a)

dz2 and dx2- y2

b)

dxy, dxz and dyz

c)

dz2

d)

dxy and dxz

26.

When the ligands move along the x, y and z axes of d orbital in metal ion (octahedral geometry), they approach directly toward or between the lobes. Name the d orbitals that feel strong repulsion?

a)

dz2 and dx2- y2

b)

dxy, dxz and dyz

c)

dz2

d)

dxy and dxz

27.

Strong field ligand is which give small splitting energy

a)

true

b)

false

28.

Magnitude of Crystal Field Splitting depends upon which factor?

a)

Nature of the ligands

b)

Oxidation of metal ion

c)

Type of d-electrons

d)

Geometry of the complex

e)

All of the above

29.

What is the oxidation state of Ni ion in coordination compound [Ni(NH3)6]^2+ ?

a)

+1

b)

+2

c)

+3

d)

+4

30.

The relation between Δt  and Δo is 

a)

Δo = 49\frac{\text{4}}{\text{9}}  Δt  

b)

Δt = Δo

c)

Δt =  49\frac{4}{9}  Δo 

d)

Δo = Δt 

31.

  1. Tetrahedral complexes are

a)

low spin always

b)

high spin always

c)

sometimes low spin

d)

sometimes high spin

32.

5.Write the configuration of d5 in strong field in octahedral complex.

a)

t2g5 eg0

b)

t2g3 eg2

c)

t2g4 eg1

d)

eg3 t2g2

33.

  1. 1 delta is similar to _____ Dq.

a)

7

b)

8

c)

9

d)

10

34.

When ___ electrons are present in d orbitals of weak field Oh complex, the CFSE will zero.

a)

two

b)

six

c)

three

d)

five

35.

From the following, complex with highest splitting energy is ___________ .

a)

K4[Fe(CN)6]

b)

K4[FeCl6]

c)

K4[Fe(SCN)6]

d)

K4[Fe(NCS)6]

36.

Unit of magnetic moment is _____ .

a)

Bohr Magneton

b)

gauss

c)

erg

d)

newton

37.

The CFSE value for octahedral complex is -6Dq. If metal is surrounded by week ligands the magnetic moment can be.

a)

4.9 BM

b)

3.87 BM

c)

5.90 BM

d)

0

38.

In CFT interaction is....

a)

Covalent

b)

ionic

c)

metallic

d)

electrostatics

39.

Calculate CFSE of the following complex: [Fe(CN)6]4−

a)

−0.4Δt

b)

−2.4Δo

c)

0.4Δo

d)

0.6Δo

40.

In presence of strong field ligands ----------complexes could result .

a)

High spin complexes

b)

low spin complexes

c)

Inner orbital complexes

d)

Both 2 and 3 options

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