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Doctors Medicines MCQs Q&A

Chlorine is liberated when we heat
(a) KMnO4 + NaCl 

(b) K2Cr2O7 + MnO2

(c) Pb(NO3)2 + MnO2 

(d) K2Cr2O7 + HCl

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2 Answers

 (d) K2Cr2O7 + conc.HCl →Cl2

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(D) K2 Cr2O7 + HCl

K2 Cr2O7 + 14HCl → 2KCl + 2 CrCl3 + 7H2O + 3Cl2 .

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