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2000
Water and Aqueous Systems
1


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Questionario a risposta multipla
1- Oxygen dissolved in water is
an element
a compound
a mixture
an alloy
2- The pressure of the vapour of a liquid at the boiling point is the same as...
the critical pressure
the atmospheric pressure
the critical temperature
the pressure at the triple point
3- Suspensions, colloids and solutions are types of
mixtures
compounds
elements
pure substances
4- In testing water for ions a reference solution is used to
show what happens when the ion is present in the test
show what happens when the ion is not present in the test
make sure the unknown sample contains the ion that is being tested
check to unknown samples for purity
check to see if the control has ions in it
5- What does one obtain when mixing two substances such as water and flour?
A solution
A suspension
An emulsion



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