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Q.

Which of the following is used in the preparation of chlorine ?

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a

Only MnO2

b

Only KMnO4

c

Both MnO2 and KMnO4

d

Either MnO2 or KMnO4

answer is D.

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Detailed Solution

4HCl+MnO2→MnCl2+2H2O+Cl2 4NaCl+MnO2 +4H2SO4→MnCl2 +4NaHSO4+2H2O+Cl2 16HCl+2KMnO4→2KCl+2MnCl2+8H2O+5Cl2    Bulk isolation of chlorine in commercial scale also involves the oxidation of chloride. In Weldon’s process, pyrolusite mineral (MnO2) is heated with concentrated hydrochloric acid, to obtain chlorine.
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