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. How is carbon dioxide made in the laboratory?

2. Which single piece of apparatus would be the best to use if you wished to find the volume of glass in a glass stopper

3. A liquid with a pH of 6 would be described as .....

4. What is the test for oxygen gas?

5. C is the symbol for which chemical element

6. Which of the below is a fossil fuel?

7. What is the pH value of pure water?

8. Pick a chemical that reacts with water

9. Which chemical will gain in mass when heated?

10. 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?