Metals and Acids KS3

Which observation is NOT a sign of a chemical reaction?

• fizzing

• temperature change

• dissolving

• colour change

What is made when a metal reacts with an acid?

• salt + water

• salt + hydrogen

• salt + carbon dioxide

• salt + oxygen

Which 2 types of reaction occur when a metal is heated in a Bunsen flame?

• oxidation

• neutralisation

• combustion

• displacement

Which of these is the correct definition for a displacement reaction?

• When a less reactive element swaps places with a more reactive element that is already in a compound

• When a more reactive element that is already part of a compound swaps places with a less reactive element

• When a more reactive element swaps places with a less reactive element that is already in a compound

• When a more reactive element that is already part of a compound swaps places with an element in another compound

Sodium is less reactive than potassium. Which is the correct equation for the displacement reaction between potassium chloride and sodium?

• Potassium chloride + Sodium → Potassium chloride + sodium

• Potassium chloride + Sodium→Potassium + sodium + chlorine

• Potassium chloride + Sodium→Potassium + Sodium chloride

• Potassium chloride + Sodium→ Sodium chloride + potassium

Which of these is a displacement reaction?

• Magnesium + oxygen → Magnesium oxide

• Hydrochloric acid + Sodium hydroxide → sodium chloride + water

• Calcium + Iron oxide → Calcium oxide + Iron

• Sodium + chlorine → Sodium chloride

Which salt will be made if zinc is reacted with sulfuric acid?

• zinc chloride

• zinc carbonate

• zinc nitrate

• zinc sulfate

When a metal is placed in a stronger acid, the reaction occurs __________________

• more vigorously

• at the same rate

• less vigorously

• Doesn't react

Complete the equation: Metal + Acid →

• Metal Salt + Water

• Metal Oxide

• Metal Salt + Hydrogen

• Metal Salt + Carbon dioxide

An acid is

• a substance with a pH of 7

• a substance with a pH higher than 7

• a substance with a pH lower than 7