G9 Science Exam Term 3

Name: Class:

If an iron nail is exposed to oxygen it rusts. Why?

If an iron nail was placed in a beaker of copper sulfate solution, does it rust or corrode?

• rust
• corrode

When substance X was placed in a beaker of zinc sulfate solution, the zinc was displaced from the solution. Next, substance X was placed in calcium nitrate solution and there was no reaction. From this information most likely what metal was substance X?

From the first reaction in question 4 above, write the word equation.

What type of reaction is taking place in question 4?

• Combustion
• Oxidisation
• Displacement

Name the top three most reactive metals in order (the most reactive first).

Write down the word equation for this chemical reaction: Sodium hydroxide solution and dilute nitric acid (remember: akali + acid -> ____ + ____)

In the above mix of an alkali and an acid, what is produced? i. water ii. a neutralised solution iii. salt + water

• i
• i and ii
• ii and iii

Sodium reacts with dilute sulfuric acid. Write the word equation for this reaction.