5.8.1.1 pure substances

Question 1

What is a pure substance

Answer 1

A single element or compound, not mixed with any other substance

Question 2

Pure elements and compounds melt and boil at the same/different temperatures?

Answer 2

Different

Question 3

To distinguish pure substances from mixtures which data is used

Answer 3

Melting and boiling point data

Question 4

A pure substance is in its natural state, unadulterated, name some examples of pure substances

Answer 4

Pure milk, baking soda, table salt and pure sugar

Question 5

Name some examples of pure substances which class as metals/ores

Answer 5

gold, copper, chlorine, diamond,

Question 6

Name some impure substances

Answer 6

air, soil , saline , tincture of iodine, sugar solution, fruit salad, sand/salt mixed in water, rocks.