[CPMT 1972, 74, 94; MNR 1985; DPMT 1982, 2002; Bihar CEE 1995; MP PET 1995]
A) $ Pb_3O_4 $
B) $ PbO $
C) $ PbO_2 $
D) $ Pb_4O_3 $
Correct Answer: A
$ Pb_3O_4\Rightarrow $ Red lead (Sindhur)
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