Unit 2 Test Revision

Question 1

Filtration

Answer 1

Separating the insoluble from the soluble substances

Question 2

Simple disilation

Answer 2

Used to purify water

Question 3

Distillation (FRACTIONAL)

Answer 3

Used to separate two liquids with different boiling points (e.g getting the alcohol out of wine).

Question 4

Crystallisation

Answer 4

Used to separate a soluble solid from a solvent (e.g salt from water)

Question 5

Paper Chroatography

Answer 5

Used to separate and identify substances from mixtures in a solution

Question 6

Ionic bonding

Answer 6

Ionic bonding occurs between positive and negative ions, which attract each other and bind together to form ionic compounds.

Question 7

Covalent bonding

Answer 7

A covalent bond is formed between non metal atoms, which combine together by sharing electrons.

Question 8

Metallic bonding

Answer 8

Metallic bonds are strong and a lot of energy is needed to break them. This is why metals have high melting points and boiling points.