Chapter 6 Material changes

Which is the name of this Acid HCl

• Sulfuric acid

• Hydrochloric acid

• Nitric acid

• Citric acid

Name of this compound MgO

• Magnesium Dioxide

• Magnesium sulfate

• Magnesium chloride

• Magnesium oxide

Which is the name of the gas that is release in a reaction of a metal with acid?

• Oxygen

• Hydrogen

• Argon

• Helium

Which is the correct reaction for a Metal + acid

• Metal hydroxide + hydrogen

• Metal oxide+ hydrogen

• Metal salt+ oxygen

• Metal salt+ hydrogen

This represent a

• Compound

• Element

• Mixture

This molecule symbol is

• HO

• OH

• H2O

• HO2

Which of this metals it the least reacting ?

• Calcium

• Silver

• copper

• Iron

This separating technic is called

• Evaporation

• distilation

• Filtration

This compound is called

• Sulfur oxide

• Sodium dioxide

• sulfur dioxide

• Sodium oxide

Which of this examples is a exothermic reaction

• Melting

• Freezing

• Combustion

• Evaporation