MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistryp-Block (group 13 and 14)Previous Year Questions
Percentage of lead in lead pencil is (AIPMT 1999)
A.80
B.20
C.zero✓ Correct
D.70
Explanation
Lead pencil contains graphite and clay. It does not contain lead.
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