Common Entrance Chemistry – 30 Multiple choice questions

1. What process would be used to obtain the solute from a solution?
 
 
 
 
2. Substances can be obtained from the ground in a variety of ways.

Which reactive low density metal is extracted  from its ore using electricity?
 
 
 
 
3. A liquid with a pH of 6 would be described as …..
 
 
 
 
4. When copper foil is heated with a roaring bunsen flame and it quickly turns black.
What is the name of the black chemical formed?
 
 
 
 
5. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.

They have the following properties:
AA yellow, crumbly solid that burns to form a single, colourless gas which turns universal indicator red.
BA grey, malleable solid that burns to form a single, white, alkaline oxide.
CA colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen.
DA green solid that decomposes when heated to form a colourless gas and leave a black powder.
Which of the substances is likely to be a compound ?
 
 
 
 
6. Pick a liquid that is a weak acid
 
 
 
 
7. Which of the properties of metals listed below is not correct?
 
 
 
 
8. A liquid with a pH of 9 would be described as …..
 
 
 
 
9. What gas is produced when zinc is added to dilute sulphuric acid?
 
 
 
 
10. Pick a chemical that will not change in mass when heated
 
 
 
 
11. 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 lid was raised a bright glow was seen to spread through the mixture

When the reaction is over the crucible + contents + lid are all re-weighed.
A white ash remains in the crucible.

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 evidence is there that a chemical change is taking place?
(read all options before answering) 
 
 
 
 
12. Name a non-metallic element that conducts electricity
 
 
 
 
13. Some salt is dissolved in warm water.
What do we call the liquid remaining in the beaker?
 
 
 
 
14. What process would be used to obtain the solvent from a solution?
 
 
 
 
15. Complete the word equation:
Hydrochloric acid + sodium hydroxide      ?
 
 
 
 
16. Peter has three coloured felt pens which he labelled A, B and C.
He used the apparatus below to separate the dyes used to make colours from each of the pens.

Which pen has an ink made from 4 dyes mixed together?Chromatography_tank2
 
 
 
17. What solid is formed when limestone is heated?
 
 
 
 
18. How can alcohol be obtained from wine?
 
 
 
 
19. The word equation below shows the reaction between iron and copper sulphate solution

Iron + copper sulphate  →  ******** + iron sulphate What is the missing chemical from the equation?
 
 
 
 
20. What colour is sulphur?
 
 
 
 
21. Name a substance with a pH value more than pH7
 
 
 
 
22. What type of acid is often put in car batteries?
 
 
 
23. Name a substance with a pH value equal to pH7
 
 
 
 
24. Is Mercury metal a solid, liquid or gas?
(at normal room temperature)
 
 
 
25. What colour would Universal Indcator turn when added to a strong alkali?
 
 
 
 
26. Crude oil can be separated into different substances using what method of separation?
 
 
 
 
27. Powdered wood charcoal (carbon) is mixed with copper oxide and heated strongly.
A red glow is seen to spread though the mixture. When the mixture has cooled a pink residue is seen.

Name the two products of this reaction.
 
 
 
 
28. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.

They have the following properties:
AA yellow, crumbly solid that burns to form a single, colourless gas which turns universal indicator red.
BA grey, malleable solid that burns to form a single, white, alkaline oxide.
CA colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen.
DA green solid that decomposes when heated to form a colourless gas and leave a black powder.
Which of the substances is likely to be a metallic element ?
 
 
 
 
29. Name a chemical that decomposes to form oxygen when it is heated
 
 
 
 
30. Look at the graph below which shows the solubility of 3 substances, A, B and C in 100g of water at different temperatures
graph2For which substance does the temperature of the water have the least effect on the solubility?