Day 1  Day 2  Day 3  Day 4  Day 5  Day 6

Day 1

Question 1

A​​ white solid​​ dissolves in water to form a​​ colourless solution.

• When​​ dilute hydrochloric acid​​ is added,​​ no gas​​ is produced.

• Flame test​​ gives a​​ yellow flame.

• Silver nitrate​​ solution forms a​​ white precipitate​​ that​​ does not dissolve in ammonia.
  Identify the compound.

Day 2

Question 1

A​​ colourless solution​​ gives a​​ blue precipitate​​ with​​ sodium hydroxide​​ that is​​ insoluble in excess.
Adding​​ dilute nitric acid​​ and​​ barium chloride​​ gives​​ no precipitate.
Identify the compound.

Day 3

Question 1

A​​ white powder​​ reacts with​​ dilute hydrochloric acid​​ to produce a​​ gas that turns limewater milky.
Flame test​​ shows a​​ red flame.
Identify the compound.

Day 4

Question 1

A​​ white solid​​ dissolves in water to form a​​ colourless solution.

• Flame test​​ gives a​​ lilac flame.

• Add silver nitrate​​ →​​ cream precipitate​​ forms,​​ partially dissolves in ammonia.
  Identify the compound.

Day 5

Question 1

A​​ colourless solution​​ forms a​​ light blue precipitate​​ with sodium hydroxide that is​​ insoluble in excess.
When​​ silver nitrate​​ solution is added, a​​ white precipitate​​ forms.
Identify the compound.

Day 6

Question 1

A​​ white solid (compound X)​​ dissolves in water to form a​​ colourless solution.
The following observations are made during tests on this solution:

• When​​ sodium hydroxide​​ solution is added, a​​ white precipitate​​ forms that is​​ insoluble in excess.

• When​​ dilute hydrochloric acid​​ is added to a small amount of the solid,​​ effervescence​​ occurs and a​​ colourless gas​​ is produced that​​ turns acidified potassium dichromate paper from orange to green.

• When​​ barium chloride​​ solution is added to the solution of X, a​​ white precipitate​​ forms.