4.to separate salt from water in a seawater mixture,what process is used?
a.condensation
b.distillation
c.evaporation
d.filtration

5.which of the following property of mixture?
a.it has a definite composition
b.it consists of a single phase
c.it has a heterogeneus composition
d.it can be chemically separated into its components

6.which of the following is a physical appearanceof a subtance?
a.complicated
b.homogeneus
c.heterogeneus
d.non-uniform

7.which one is thebest way to detemine wether an unknown sample is a subtance or mixture?
a.knowing its density
b.tasting the given sample
c.observing its physical appearance
d.testing its melting and boiling point
8.which is NOT a technique to seperate components of mixture?
a.condensation
b.distillation
c.evaporation
d.filtration

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