Loss of electrons from an element 'X' is represented by : X - 3e^- ⟶ X³⁺ [X ⟶ X³⁺ + 3e^-)

1. X is a …………… [metal/non-metal] and will form …………… [electrovalent/covalent] compounds only.

2. X³⁺ formed is a …………… [cation/anion] and element 'X' has a valency of …………… [+2/+3/-3].

3. If X³⁺ combines with oxygen the formula of the product is …………… [X₂O₃ / XO / X₃O₂]

4. If the above product in the …………… [solid/molten] state is electrolysed the ion X³⁺ will get discharged at the …………… (anode/cathode).

5. The ion X³⁺ …………… [accepts/loses] electrons and gets …………… [oxidized/reduced] to neutral …………… [ions/atoms/molecules].

The oxide of the metal which reacts with both acids and alkalis to give salt & water.

1. MgO
2. CuO
3. Al₂O₃
4. K₂O

The chemical name of the main ore of aluminium.

1. Aluminium fluoride
2. Aluminium oxide
3. Sodium aluminium fluoride
4. Hydrated aluminium oxide

The process of dressing of the ore which involves separation of ore & gangue due to preferential wetting.

1. Magnetic separation
2. Hydrolytic method
3. Froth flotation method
4. Chemical method