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JEE Main levelSingle correct optionDifficulty 2 of 3pb098

Red lead, $Pb X_{3} O X_{4}$ , is warmed with hot dilute nitric acid. The products are

A $Pb (NO X_{3}) X_{4}$ and $H X_{2} O$
B $Pb (NO X_{3}) X_{2}$ and $NO X_{2}$ only
C $PbO X_{2}$ and $NH X_{4} NO X_{3}$
D $Pb (NO X_{3}) X_{2}$ , $PbO X_{2}$ and $H X_{2} O$

Answer: D

Pb X_{3} O X_{4}

behaves as

2 PbO \cdot PbO X_{2}

. Only the basic

PbO

part reacts with acid:

Pb X_{3} O X_{4} + 4 HNO X_{3} 2 Pb (NO X_{3}) X_{2} + PbO X_{2} + 2 H X_{2} O

. The

PbO X_{2}

remains as a brown residue.

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