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How will you distinguish between: a. M...

How will you distinguish between:
a. Magnesium and strontium b. `K_(2)SO_(4) and BaSO_(4)`

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(a). When heated in the Bunshen flame, magnesium does not impart any colour, but stromntium gives crimson red colour to the flame.
(b). `K_(2)SO_(4)` is soluble in water, but `BaSO_(4)` is insoluble.
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