Common Entrance Chemistry – 30 Multiple choice questions

1. Name a chemical that decomposes to form oxygen when it is heated
2. What process would be used to obtain the solvent from a solution?
3. Word equations for 4 different reactions are shown.
Which of them is an example of a combustion reaction?
4. Fill in the missing word from the equation shown below:
Acid + metal    →  salt   +   …………
5. If Magnesium hydroxide (indigestion powder) were added to vinegar which of the answers would best describe what would happen?
6. When a substance was burnt it was found to form carbon dioxide and water as products of combustion.
What was being burnt?
7. An acid would have what pH number?
8. Ca is the symbol for which chemical element
9. The best way to separate sand from iron filings is
10. Name a substance with a pH value more than pH7
11. Which of the below is a fossil fuel?
12. What is the test for hydrogen gas?
13. This diagram shows the water cycle
water cycle3Where does the energy come from that drives the water cycle?
14. A liquid with a pH of 6 would be described as …..
15. Which of the description of particles in a substance below represents a GAS?
16. When a gas changes to a liquid the process is called
17. What type of acid is found in your stomach?
18. Which of the gases below does not burn?
19. Which of the properties of water listed below is NOT correct
20. What colour would Universal Indcator turn when added to a neutral liquid?
21. What is the test for carbon dioxide gas?
22. Name a substance with a pH value equal to pH7
23. What will chocolate do when heated gently in an open dish
24. What colour is copper carbonate?
25. What is the chemical symbol for magnesium?
26. What is the chemical symbol for iron?
27. bunsen1bThis diagram shows a Bunsen burner.
The flame is yellow and smoky.

Is the air hole open or closed?
28. Pick a chemical that decomposes when heated
29. What colour will universal turn when mixed with indigestion mixture?
30. Why are pan handles often covered in plastic (or wood)?