Calgon, chemically identified as Sodium hexametaphosphate, formula (NaPO3)6, is a water softener. It operates by chelating calcium and magnesium ions, which cause hard water. This process prevents the formation of insoluble salts, thereby softening the water. It is the accurate selection for this purpose.
Arrange the following alkenes in the decreasing order of stability:
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The reactions which cannot be applied to prepare an alkene by elimination, are
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