Question 3
Carbon and its CompoundsWhen calcium oxide is heated with carbon, the oxide will
- A.be converted to the carbide
- B.be converted to the trioxocarbonate(IV) salt
- C.decompose to the metal
- D.melt, producing carbon(IV) oxide.
Show the answer and explanation
Answer: A (be converted to the carbide)
Explanation
In an electric furnace CaO + 3C → CaC2 + CO; calcium carbide is formed (it is later used to make ethyne).