1 What apparatus do we need to carry out the following steps in an experiment?
a) Measure 200 ml of water and boil the water.
b) Take out 10 drops of liquid A from bottle Q and 10 drops of liquid B from bottle P.
Then mix A and B.
c) Measure 5 g of salt and 100 ml of water. Dissolve the salt in water by mixing and
stirring them.
2 What apparatus do we need in order to carry out the following steps in an experiment?
a) (i) Measure 7ml of water and boil the water.
(ii) Measure the temperature of the boiling water.
b) (i) Measure 20g of salt and 100ml of water.
(ii) Add the salt to the water in a beaker and stir it. Measure the time taken for all
the salt to dissolve in water.
3 The melting point of a substance Z melts over a range of temperatures from 117°C to
121°C. What can be said about the melting point of a pure sample of substance Z?
A. The melting point would be between 117°C and 121°C.
B. It would melt at temperatures lower than 117°C.
C. It would melt at temperatures higher than 121°C.
D. Its melting point cannot be determined.
4 Two hikers, A and B are boiling water simultaneously. Hiker A is at the base of the
mountain while Hiker B is at the top of the mountain. Hiker B’s water starts boiling
much earlier than Hiker A’s. Why is this the case?
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