5070/12

Chemistry 5070/12October/November 2010

Cambridge O-Level · Multiple Choice · answer key with instant marking and worked solutions

40
questions
40
marks
60
minutes

Topics Organic Chemistry · Chemical Reactions · Metals · Chemistry of the Environment · Atoms, Elements and Compounds · Acids, Bases and Salts · +6 more

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Q11MStates of MatterFree sample

The boiling points of various gases found in the air are shown below.

C^\circ\text{C}
argon–186
carbon dioxide–78
nitrogen–198
oxygen–183

If the air is cooled, the first substance to condense is water.

If the temperature is lowered further, what is the next substance to condense?

Options

A   argon
B   carbon dioxide
C   nitrogen
D   oxygen

The rest of this paper

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