Separation techniques

What is a solution formed by?

• A mixture of two or more substances in the same phase
• Two gases only
• A solid and a liquid
• A single substance

How can salt be separated from water in a solution?

• By evaporation
• By distillation
• By filtration
• By freezing

Which component evaporates first when separating ethanol and water by distillation?

• Ethanol
• Salt
• Iron
• Water

In a mixture of sulfur and iron filings, how can you separate the components?

• Using a magnet
• By dissolving
• By heating
• By crushing

What is the term for the substance that remains on filter paper after filtration?

• Residue
• Solvent
• Solution
• Filtrate

What technique is used to separate immiscible liquids like oil and water?

• Separatory funnel
• Magnetism
• Filtration
• Evaporation

When separating sand from salt water, what process is used after filtration to obtain salt?

• Evaporation
• Sedimentation
• Condensation
• Distillation

What type of mixture is formed when ethanol and water are mixed?

• Homogeneous mixture
• Colloid
• Suspension
• Heterogeneous mixture

What is the main difference between homogeneous and heterogeneous mixtures?

• Homogeneous mixtures have a uniform composition, whereas heterogeneous mixtures do not
• Homogeneous mixtures can be separated easily
• Heterogeneous mixtures contain only solids
• Heterogeneous mixtures are always liquid

In the context of separating mixtures, what does the term 'filtrate' refer to?

• The liquid that passes through the filter
• The solid left on the filter
• The original mixture
• The apparatus used for filtration