Explanation:

- Nitro Glycerol:

- Used in dynamite. It's a heavy, oily, explosive liquid.

- When absorbed in a stabilizing medium, it powers dynamite.

- Methyl alcohol:

- Commonly known as methanol or wood alcohol.

- Used as a solvent, antifreeze, or fuel, but not in dynamite.

- Iron oxide:

- Known as rust in one of its forms.

- Used in pigments and as a catalyst, but not directly related to explosives.

- Copper sulphate:

- A blue crystalline chemical used for agriculture and as a fungicide.

- It doesn't play a role in making dynamite.