Question

Which one of the following is not an example of a pure substances
1) Oxygen
2) copper
3) air
4) carbondioxide​

Answer 1

$\huge\underline\bold\red{AnswEr}$

$\huge \bold \red{AIR}$

• air is a mixture of many gases so air is not example of pure substance.

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Answer 2

$\huge\underline\bold\red{AnswEr} </p><p>$

$\huge \bold \red{AIR}$

air is a mixture of many gases so air is not example of pure substance.

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