Respuesta :

Explanation:

3)

Equation -

3F₂ (g) + 2AlBr₃ (s) → 3Br₂ (l) + 2AlF₃ ↓

4)

When sulphur dioxide gas reacts with oxygen then it forms sulphur trioxide gas.

Equation -

2SO₂ (g) + O₂ (g) → 2SO₃ (g)