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Reactivity with Halogens and Hydrogen (Group 2)

Question

Chlorine is found in combined state in :
blue vitriol
gypsum
potassium nitrate
calcium chloride

A

potassium nitrate

B

blue vitriol

C

gypsum

D

calcium chloride

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Solution

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Gypsum is a soft sulphate mineral composed of calcium sulphate dihydrate, with the chemical formula $C a S O_{4}$ .

Potassium nitrate is a chemical compound with the chemical formula $K N O_{3}$ . It is an ionic salt of potassium ions $K^{+}$ and nitrate ions ${N O_{3}}^{-}$ .

Blue vitriol is copper(II) sulfate pentahydrate, $C u S O_{4} .5 H_{2} O$ .

Calcium chloride is inorganic compounds with the chemical formula $C a C l_{2}$ .

Thus Option D is correct.

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