Y8 Chemical Reactions

What is produced in complete combustion of a fuel?

• Carbon

• Carbon monoxide

• Carbon monoxide and water

• Carbon dioxide and water

In this chemical reaction, which is the product/s?

Magnesium + Oxygen --> Magnesium oxide

• magnesium

• magnesium and oxygen

• magnesium oxide

• oxygen

Which of the following is the most reactive in water?

• Lithium
• Sodium
• Potassium

Use the following observations to select the correct reactivity series (highest to lowest).

calcium + water: slow

sodium + water: fast

calcium + dilute acid: very fast

gold + dilute acid: no reaction

aluminium + dilute acid: fast

• calcium, sodium, aluminium, gold

• sodium, calcium, aluminium, gold

• sodium, aluminium, calcium, gold

• gold, aluminium, calcium, sodium

Which of the following is MOST reactive?

• Lithium

• Lead

• Tin

• Copper

What gas is always produced when a metal reacts with water?

• Oxygen
• Carbon Dioxide
• Hydrogen
• Carbon Monoxide

What else is produced when a metal reacts with water? (HINT: Water has the formula H₂O)

• Metal Oxide
• Metal Carbonate
• Metal Hydride
• Metal Hydroxide

Metals can also react with acids. This produces a gas. What is the name of this gas?

• Hydrogen
• Carbon Dioxide
• Nitrogen
• Oxygen

As well as a gas, there is another product made when an acid reacts with a metal. What is the name for this?

• Salt
• Water
• Alkali
• Carbon

When sodium reacts with hydrochloric acid, what is the name of the salt formed?

• Sodium Hydride
• Sodium Chloride
• Sodium Hydrochloric
• Sodium Chlorine