Mixtures & Separation

What is the process of separating a mixture by passing it through a sieve?

• Evaporation

• Filtration

• Distillation

• Decantation

Which separation technique involves using a magnet to separate magnetic substances from a mixture?

• Magnetic extraction

• Magnetic fusion

• Magnetic filtration

• Magnetic separation

What is the method of separating different components of a mixture by hand called?

• Handpicking

• Finger selection

• Hand sorting

• Manual sorting

When would you use sieving as a separation technique?

• When combining different substances

• When isolating dissolved substances from a solution

• When separating solid particles of different sizes

• When separating liquids from solids

Why is handpicking not suitable for separating very small particles in a mixture?

• Handpicking damages the particles.

• Handpicking is too expensive for small particles.

• Handpicking is too fast for small particles.

• Handpicking is inefficient and impractical for very small particles.

In which type of mixture would you use magnets for separation?

• Mixture containing liquids

• Mixture containing non-magnetic materials

• Mixture containing magnetic materials

• Mixture containing gases

What happens to the non-magnetic substances when using a magnet for separation?

• Non-magnetic substances change their properties when near the magnet.

• Non-magnetic substances get repelled by the magnet.

• Non-magnetic substances stick to the magnet.

• Non-magnetic substances do not get attracted to the magnet.

How does sieving help in separating components of a mixture based on size?

• Sieving helps in separating components of a mixture based on shape

• Sieving helps in separating components of a mixture based on size by retaining larger particles on top of the sieve and allowing smaller particles to pass through.

• Sieving helps in separating components of a mixture based on taste

• Sieving helps in separating components of a mixture based on color

Can you name a common example where handpicking is used for separation?

• Grapes or berries

• Pencils or pens

• Apples or oranges

• Books or magazines

What are the advantages of using different separation techniques for mixtures?

• The advantages include isolating specific components, purifying substances, and increasing efficiency in analysis or processing.

• Causing chemical reactions between components

• Decreasing the overall yield of the mixture

• Introducing impurities into the substances