Properties and Reactions of Substances

Which of the following is a physical property?

• Reaction with acids

• Oxidation

• Melting point

• Neutralization

Which property involves a reaction with water?

• Boiling point

• Appearance

• Density

• Chemical property

What is NOT a physical property?

• Color

• State (solid/liquid/gas)

• Reaction with metals

• Density

What happens during a physical change?

• New substances are formed

• A chemical reaction occurs

• Heat is always released

• No new substances are produced

Which of the following is a chemical change?

• Melting ice

• Dissolving salt in water

• Burning paper

• Breaking a glass

Which reaction creates new substances?

• Boiling water

• Freezing water

• Burning wood

• Breaking a rock

What does burning involve?

• Only heat production

• Reaction with oxygen

• Formation of hydrogen gas

• Neutralization reaction

Which of the following is an example of burning?

• 2 Mg + O2 → MgO + heat

• 2 Na + 2 H2O → 2 NaOH + H2

• HCl + NaOH → NaCl + H2O

• Mg + 2 HCl → MgCl2 + H2

What is the product of burning carbon?

• Carbon monoxide

• Carbon dioxide

• Magnesium oxide

• Sodium hydroxide

Which metal reacts violently with water?

• Magnesium

• Iron

• Potassium

• Copper