Paper 1

Question 1

Saturated?

Answer 1

No more solute can dissolve in solvent

Question 2

Solvent?

Answer 2

Liquid which solute dissolves in

Question 3

Element?

Answer 3

Only 1 type atom that cannot be split

Question 4

Mixture?

Answer 4

2 or more elements not chemically combined

Question 5

Solution?

Answer 5

Mixture of solvent and solute

Question 6

Ductile?

Answer 6

Can be drawn into a wire``

Question 7

Why are ionic compounds brittle?

Answer 7

When force applied, ions with same charge end up near each other.

Like charges repel.

Structure falls apart

Question 8

Only ____ ionic substances conduct due to their delocalised electrons

Answer 8

molten/liquid

Question 9

Reactivity from most to least

Answer 9

Cl, Br, I

so Cl2 + 2KBr –> 2KCl + Br2
most reactive replaces least reactive

Question 10

Covalent bonds?

Answer 10

Shared pair of electrons between non-metals

Question 11

Ionic bonds?

Answer 11

Intermolecular force of attraction with metals and non-metals between the opposite-charged ions when elements transfer electrons

Question 12

Metallic bonds?

Answer 12

strong electrostatic force of attraction between metal ions and delocalised electrons

Question 13

Why are metals malleable?

Answer 13

They have layers of metal ions which slide when force applied.
Metallic bonding allows it to change shape without shattering.

Question 14

Diamond?

Answer 14

Giant covalent structure
High melting point
Giant tetrahedral structure
1 carbon: 4 others
Strong covalent bonds
No delocalised e-
Not a lubricant

Question 15

Graphite?

Answer 15

Giant covalent structure
High melting point
Giant tetrahedral structure
1 carbon: 3 others
Strong covalent bonds
Delocalised e- (hence 3 not 4)
Layers can slide

Question 16

CO2 and CH4 atoms held by

Answer 16

Weak intermolecular forces

but the C is covalently bonded to the O2 or H4

Question 17

Tensile strength?

Answer 17

maximum force provided before breaking point

Question 18

Fullerenes

Answer 18

Drug delivery and lubricants
High conductivity
High tensile strength
Hexagonal Carbon rings

Question 19

Graphene

Answer 19

1 atom tick
High conductivity
Lubricant for Door locks, Furnaces, brake linings
Conductor for batteries, and powder in microphones