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Mixture

Which of the ...

Question

Which of the following is a mixture ?

Salt, Air, Water, Alum, Sugar

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Solution

Answer: Air

Two matters do not combine with chemically called mixture.

Air is the mixture of gases like N2, O2, H2.

Alum is an addition compound (pure) (K2SO4. Al2(SO4)3.24H2O).
Salt is a compound, (pure). Chemical formula of common salt is NaCl.
Water is compound (pure) with chemical formula H2O.

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