Exam questions Group: Name

Exam questions
Group: __________ Name: ______________________________

1. 
   Tick each answer in the table that Sofia has correct.
   

List of materials	Sofia’s answer	Correct?
Silver	Metal
Oxygen	Non-metal
Helium	Non-metal
Carbon	Metal
Copper	Metal
Nitrogen	Non-metal
Sulfur	Metal
Iron	Metal

2. 
   How many metals does Sofia think there are? _________________
   
3. 
   What is the correct number of metals? _______________________
   
4. 
   How many non-metals does Sofia think there are? _____________
   
5. 
   What is the correct number of non-metals? ___________________
   
6. 
   Write “true” or “false” next to each of these statements
   

1. 
   All metals are magnetic ________
   
2. 
   Solid non-metals are brittle ________
   
3. 
   All metals are solids ________
   
4. 
   Metals conduct heat energy _______
   
5. 
   Non-metals are good conductors of electricity ________
   

7. 
   Describe equipment that you need to separate the mixture.
   

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8. 
   The words have a correction with either acids or alkalis. Write each word or group of words in the correct column in the table.
   

Remember, some of the words might belong in both columns.
Citric acid, cola, corrosive, lemon juice, harmful, nitric acid, sharp, sour, sodium hydroxide, soap, vinegar, washing powder, washing soda

Acid	Alkali

9. 
   This table lists some safety points to think about when you use chemicals. Complete the table by explaining the reason for each safety point.
   

Safety point	Reason
Wearing safety glasses
Standing up to work
Placing bottle stoppers upside down on the bench
Replacing the bottle stopper as soon as you have finished using the bottle
Working in an orderly way

10. 
    Explain why universal indicator is more useful than litmus.
    

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