Separation Techniques and Chemical Reactions

Which physical property would you test to determine if a substance is a metal?

• Luster

• Boiling point

• Hardness

• Conductivity

How would you separate two liquids with different boiling points?

• Filtration

• Centrifugation

• Evaporation

• Distillation

Which method would you use to separate a mixture of sand and water?

• Distillation

• Filtration

• Magnetism

• Chromatography

What is the correct order of operations to separate salt, sand, and iron filings?

• Magnetism, dissolution, filtration

• Filtration, magnetism, dissolution

• Filtration, dissolution, magnetism

• Magnetism, filtration, evaporation

How can you separate sugar from a sugar-water solution?

• Distillation

• Evaporation

• Centrifugation

• Chromatography

Which of these is composed of a single element?

• Water

• Sodium chloride

• Copper

• Sugar

How are particles arranged in a liquid?

• Loosely packed and able to move

• Tightly packed and vibrate

• Spread far apart

• Rigidly fixed in place

What happens to sugar when you dissolve it in tea?

• It settles at the bottom

• It becomes visible as crystals

• It dissolves completely

• It forms layers

How can you identify if a sample is a mixture?

• By its melting point

• By observing different particles

• By uniform composition

• By chemical formula

Why is a compound different from a mixture?

• It contains only one kind of atom

• Its elements are chemically bonded

• It can be physically separated

• It has a variable composition