Science Y7 Revision Term 2

1. When iron reacts with sulfur through heating, what is the product formed?

• iron sulfide
• carbon dioxide
• iron oxides
• iron sulfate
• iron chloride

2. The product of a reaction is magnesium oxide; what were the reactants?

• magnesium
• oxygen
• carbon dioxide
• magnesium hydroxide
• magnesium oxide

3. Which two elements are found in water?

• hydrogen
• oxygen
• potassium
• magnesium
• zinc

4. When magnesium reacts with hydrochloric acid, what are the products formed?

• magnesium chloride
• hydrogen
• carbon dioxide
• magnesium
• magnesium nitrate

5. A simple chemical reaction happens when iron rusts. This happens when iron reacts with the oxygen in the air. What is the chemical name for rust?

• iron oxide
• iron chloride
• iron sulfate
• iron nitrate
• carbon dioxide

6. When carbon reacts with oxygen when it burns, which gas is formed?

• carbon dioxide
• neon
• oxygen
• helium
• nitrogen

7. When zinc reacts with hydrochloric acid, what are the products formed?

• hydrogen
• zinc chloride
• carbon dioxide
• zinc hydroxide
• zinc sulfide

8. What are produced in the neutralisation reaction between sodium hydroxide and hydrochloric acid?

• sodium chloride
• water
• carbon dioxide
• hydrogen
• sodium chlorate

9. What is neutralisation?

• Neutralisation is a reaction between a salt and water where a solution of pH7 is produced.
• Neutralisation is a reaction between an acid and an alkali where a solution of pH1 is produced.
• Neutralisation is a reaction between an acid and an alkali where a solution of pH7 is produced.
• Neutralisation is a reaction between an acid and an alkali where a solution of pH14 is produced.
• Neutralisation is a reaction between a salt and water where a solution of pH9 is produced.

10. What are the safety measures should be taken in handling concentrated sodium hydroxide solution? Choose best two of the following.

• wear safety glasses
• wear gloves
• use tongs
• use beakers
• use Bunsen burner