Before:

After:

Reaction Type: Synthesis

The iron changed it’s colour to a blue grey.

Reaction 2: Burn a butane lighter

Before:

After:

Reaction Type: Combustion

There was a blue flame created by the lighter.

Reaction 3: Hydrogen peroxide

Before:

After:

Reaction Type: Decomposition

The liquid became yellow and released a lot of steam.

Reaction 4: Copper and silver nitrate

Before:

After:

Reaction Type: Single replacement

The wire became dark grey and started disintegrating.

Reaction 5: Potassium iodide and lead nitrate

Before:

After:

Reaction Type: Double replacement

It formed a yellow and thick substance.

Reaction 6: Sodium hydroxide and sulphuric acid

Before:

After:

Reaction Type: Acid base

No visible change, the resultant became neutral.

Reaction 1: Burning steel wool