Chemistryeasy · Past Paper
Which form of carbon is used to make the core of pencils?
ACharcoal
BCoke
CGraphite
DLampblack
✓ Correct Answer: C — Graphite
Pencil 'lead' is actually a mixture of graphite and clay; graphite leaves a black mark due to its layered structure.
Share this question
More from Chemistry
- Identify the type of reaction: $AgNO_3(aq) + NaCl(aq) \rightarrow AgCl(s) + NaNO_3(aq)$.
- What is the reason Aluminum does not corrode easily despite being a reactive metal?
- Which metal is used as a 'getter' in vacuum tubes to remove traces of oxygen?
- Which metal foil is used to decorate sweets in Nepal and India?
- Which of these is the purest form of Iron?