MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp-Block (group 13 and 14)Previous Year Questions

Darkening of surface painted with white lead is due to (CPMT 2009)

A.H2S✓ Correct

B.CO2

C.Cu

D.O2

Explanation

Darkening of surface with white lead is mainly due to the reaction of hydrogen sulphide in presence of air to produce a black coloured lead sulphide. Hence, the correct option is (a).

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