Explaining Shapes

Question 1

Steps

Answer 1

State number of bonding and lone pairs
Stars electrons pairs repel and try get as far as possible
No lone pairs (electron pairs repel equally )
Lone pairs repel more than bonding pairs
State actual shape and angle

Question 2

2

Answer 2

Lone pairs repel more than bonding pairs and reduce bond angle

Question 3

How does an intermolecular force arises

Answer 3

Uneven distribution of elextrons in one molecule induces dipole in neighbouring molecule
Symmetrical cances out dipole