Suggest separation technique (s) one would need to employ to separate the following mixtures:
- Mercury and water
- Potassium chloride and ammonium chloride
- Common salt, water and sand
- Kerosene oil, water and salt.
- Separation by using separating funnel
- Filtration to separate sand followed by evaporation/distillation
- Separation by using separating funnel to separate kerosene oil followed by evaporation or distillation.