Reacting metals

Question 0

How do calcium, magnesium, aluminium, zinc, iron and tin react with dilute acids

Answer 0

All react with dilute hydrochloride and sulphuric acids to form hydrogen and the metal chloride or sulphate

Question 1

What two metals have an explosive reaction with dilute acids

Answer 1

Potassium and sodium

Question 2

What colour is the oxide formed when heated in air with: potassium sodium calcium magnesium aluminium and zinc

Answer 2

White

Question 3

What is the colour of the oxide formed when iron, silver, tin, copper and lead are reacted when heated in air

Answer 3

Iron: brown (or black)
Silver: brown 
Tin: black
Copper: black
Lead: yellow

Question 4

What is tarnishing

Answer 4

A slow reaction on cold air which forms a layer of the metal oxide

Question 5

Which metal doesn’t text with cold air or when heated in air

Answer 5

Gold

Question 6

What happens with lead, copper, silver and gold

Answer 6

They do not react with hydrochloride or sulphuric axis but may be oxidised by nitric acid