10 chemistry questions

Common Entrance Chemistry – 10 Multiple choice questions
Answer all 10 questions and then press ‘Submit’
Your score and any corrections will then be shown
(Different questions each time the quiz is run)

1. Wax is a compound of hydrogen and carbon (known as hydrocarbon).

How many products would be formed when wax burns?

2. Which of the following is true about air?

3. What is the chemical symbol for magnesium?

4. Which of the gases below is sometimes put in balloons to make them float?

5. What is the chemical symbol for gold?

6. Is water an element compound or mixture?

7. Name a neutral liquid

8. air

Look at the diagram above.

100 cm3 of air is put in one of the syringes. When the copper is heated it reacts with the oxygen in the air inside the syringe.

The syringe plungers are moved in and out so that all of the air is passed over the hot copper. When there is no further change the apparatus is allowed to cool (to allow the heated air to contract.Some copper remains unreacted because there is no oxygen left in the syringe.The gas remaining in the syringe is mostly nitrogen.ResultsVolume of air in syringe at start = 100cm3
Volume of air in syringe after heating = 79 cm3
 What volume of air was used up by the copper?

9. What chemical change will happen to copper foil when it is heated?

10. The filament of an electric light bulb is often made of