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A scarlet compound (A) is treated with conc. HNO3 to give a chocolate brown precipitate (B) and a colourless solution of C. On adding KI to this solution, a yellow ppt. (D) is obtained. The precipitate (B) on warming with conc. HNO3 in the presence of Mn(NO3)2 produces a pink coloured solution due to the formation of (E). What is (E) ? (A) PbCrO4 (B) PbI2 (C) MnO2 (D) kMnO4

A scarlet compound (A) is treated with conc. HNO3
to give a chocolate brown precipitate (B) and a
colourless solution of C. On adding KI to this
solution, a yellow ppt. (D) is obtained. The
precipitate (B) on warming with conc. HNO3 in the
presence of Mn(NO3)2 produces a pink coloured
solution due to the formation of (E). What is (E) ?
(A) PbCrO4 (B) PbI2 (C) MnO2 (D) kMnO4

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
878 Points
13 years ago

Dear student

A is Pb3O4

B is PbO2

C is PbI2

D is Pb(MnO4)2

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