chemical bonding

Question 1

2 sigma bonds
0 lone pairs

hybridisation, angle shape

Answer 1

sp hybridised
180 degrees
linear

Question 2

3 sigma bonds
0 lone pairs

hybridisation, angle shape

Answer 2

sp2
120
trigonal planar

Question 3

2 sigma bonds
1 lone pairs

hybridisation, angle shape

Answer 3

sp2
< 120
bent/angular/v

Question 4

4 sigma bonds
0 lone pairs

hybridisation, angle shape

Answer 4

sp3
tetrahedral
109

Question 5

3 sigma bonds
1 lone pairs

hybridisation, angle shape

Answer 5

sp3
107
pyramidal

Question 6

2 sigma bonds
2 lone pairs

hybridisation, angle shape

Answer 6

sp3
104.5
bent/angular/v

Question 7

Bent’s rule

Answer 7

lone pair can acquire any position in sp2, sp3, sp3d2 hybridisation because all positions are equivalent

but for sp3d2 hybridisation, lone pair goes in orbital with more %s character

Question 8

5 sigma bonds
0 lone pairs

hybridisation, shape

Answer 8

sp3d
trigonal bipyramidal

Question 9

4 sigma bonds
1 lone pairs

hybridisation, shape

Answer 9

sp3d
see-saw

Question 10

3 sigma bonds
2 lone pairs

hybridisation, shape

Answer 10

sp3d2
t-shaped

Question 11

2 sigma bonds
3 lone pairs

hybridisation, shape

Answer 11

sp3d2
linear
l.p. at equatorial positions

Question 12

6 sigma bonds
0 lone pairs

hybridisation, shape angle

Answer 12

sp3d2
octahedral
90

Question 13

What does MOT tell us

Answer 13

BB DSP
Bond order
Bond length
Diamagnetism
Stability
Paramagnetism

Question 14

how many molecular orbitals formed

Answer 14

equal to the number of atomic orbitals combined

Question 15

what are the two types of molecular orbitals formed? which has lower energy

Answer 15

anti-bonding molecular orbitals (σ * , π * ) and bonding molecular orbitals σ, π

bonding molecules have lower energy than antibonding molecular orbitals

Question 16

sigma bond pi bond- what type of overlapping

Answer 16

sigma bond - axial bonding
pi bond- parallel overlapping

Question 17

Polarizing power

Answer 17

Ability of a cation to polarize a nearby anion

Question 18

Polarizability

Answer 18

Ability of anion to get deformed by cation

Question 19

what does fajan’s rule show

Answer 19

amount of covalent character present in ionic bond due to polarization of anions

Question 20

what should the size of cation be for more polarizing power

Answer 20

small size so there will be more covalent character in ionic bond

Question 21

pseudo noble configuration elements + what will their covalent character be

Answer 21

coinage metals- Cu, Ag, Au
Zinc family- Zn, Cd, Hg
Highest covalent character

Question 22

What is easier to polarise small or large anion

Answer 22

large

Question 23

electronegativity difference for
1. ionic
2. polar covalent
3. non-polar covalent

Answer 23

1. ionic: >1.8
2. non polar covalent: 0 to 0.3
3. polar covalent: 0.4 to 1.8