Common Entrance Chemistry – 30 Multiple choice questions

1. After filtering a mixture what do we call the liquid that drips through the filter paper?
 
 
 
2. Which of the gases below burns well and can be used as a fuel?
 
 
 
 
3. What colour is copper carbonate?
 
 
 
 
4. What colour is sulphur?
 
 
 
 
5. About 20cm of magnesium ribbon is chopped up into 1cm lengths and placed in a crucible which is then weighed along with its lid.

The crucible is heated strongly and the lid gently raised avery few seconds.

When the reaction is over the crucible + contents + lid are all re-weighed

These are his results:
  • Mass of empty crucible + lid  = 51.2g
  • Mass of crucible + lid + magnesium (before heating) = 54.3g
  • Mass of crucible + lid + contents (after heating) = 54.7g
 

What is the magnesium reacting with?
 
 
 
 
 
6. Which of the following is true about air?
 
 
 
 
7. Which is the best way to get the salt back from some salty water
 
 
 
 
8. What colour is sulphur?
 
 
 
 
9. Name a chemical that decomposes to form oxygen when it is heated
 
 
 
 
10. Limestone and chalk are made of which chemical compound?
 
 
 
 
11. Exactly enough sodium hydroxide solution is added to hydrochloric acid to make a neutral solution.
How can salt (sodium chloride crystals) be obtained from the resulting solution?
 
 
 
 
12. A liquid with a pH of 7 would be described as …..
 
 
 
 
13. This diagram shows the water cycle
water cycle3Where does the energy come from that drives the water cycle?
 
 
 
 
14. What colour is copper sulphate?
 
 
 
 
15. A liquid with a pH of 9 would be described as …..
 
 
 
 
16. Pick a chemical that will not change in mass when heated
 
 
 
 
17. Four different substances are added to dilute sulphuric acid
Which of the substances would produce no reaction?
 
 
 
 
18. What will iodine do when heated in an open test tube?
 
 
 
 
19. What is the name of the chemical which has the formula CH4 ?
 
 
 
 
20. What colour would Universal Indcator turn when added to a strong acid?
 
 
 
 
21. Is carbon dioxide a solid, liquid or gas?
(at normal room temperature)
 
 
 
22. What colour will universal turn when mixed with indigestion mixture?
 
 
 
 
23. When a gas changes to a liquid the process is called
 
 
 
 
24. What is the test for hydrogen gas?
 
 
 
 
25. Pick a liquid that is a mild alkali
 
 
 
 
26. A substance has a melting point of -39C and a boiling point of 357C. At normal room temperature would it be a
 
 
 
27. The term ‘ CERAMICS’ refers to what group of substances?
 
 
 
 
28. What colour will universal turn when mixed with hydrochloric acid?
 
 
 
 
29. Fom the list of properties below pick the one which describes a non-metallic element:
 
 
 
 
30. About 20cm of magnesium ribbon is chopped up into 1cm lengths and placed in a crucible which is then weighed along with its lid.
The crucible is heated strongly and the lid gently raised avery few seconds.

When the reaction is over the crucible + contents + lid are all re-weighed

These are his results:
  • Mass of empty crucible + lid  = 51.2g
  • Mass of crucible + lid + magnesium (before heating) = 54.3g
  • Mass of crucible + lid + contents (after heating) = 54.7g
 

What mass of oxygen did the magnesium react with?