33. Lead pencil contains A.Lead B.Ferrous sulphide C.Lead sulphide D.Graphite
Answer: Option D Solution: Lead pencils contain graphite (a form of carbon), not lead. In fact, contrary to what many people believe, lead pencils never were made with lead. The ancient Romans used a writing device called a stylus.
Answer: Option B Solution: If we burn graphite, no residue will be left.
