11. Which of the two separation techniques can be used to separate small pebbles from sand?
A
B
Read this statement to answer questions 12-15.
Joseph wants to compare the chemical properties of two substances. In
doing it, he prepared two flasks containing the substances and labelled
them Liquid A and Liquid B. He monitored the boiling points of the liquids
and found that the boiling points were 100°C for substance A and 110°C -
112°C for liquid B.