Question

Which of the following is not a mixture ?
(a) kerosene
(b) air
(c) alcohol
(d) petrol

Answer 1

Alcohol is not a mixture

Explanation:

Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. Example: Air (mixture of various gases ) , Kerosene (mixture of hydrocarbons) and Petrol (mixture of various hydrocarbons)

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: alcohol $(CH_3OH)$

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Answer 2

Alcohol is not a mixture