Question

Which of the following is not a compound ?

• A. Sulphur dioxide
• B. Chalk
• C. Lead
• D. Sulphuric acid

Answer 1

Answer: (C)

Lead

$S{O}_2$ is a compound consisting of sulphur and oxygen atoms.
Chalk ($CaC{O}_3$) is again a compound comprising of calcium, carbon and oxygen atoms.
$H_{2}S{O}_4$ is also a compound consisting of hydrogen, oxygen and sulphur atoms.
On the other hand ,lead $\left(Pb\right)$ is an element.