Question:
The ore that contains both iron and copper is:
Correct Option: 1
Solution:
Amongst the given ores, copper pyrite $\left(\mathrm{CuFeS}_{2}\right)$, dolomite $\left(\mathrm{MgCO}_{3} \cdot \mathrm{CaCO}_{3}\right)$, malachite $\left[\mathrm{CuCO}_{3} \cdot \mathrm{Cu}(\mathrm{OH})_{2}\right]$, azurite $\left[2 \mathrm{CuCO}_{3} \cdot \mathrm{Cu}(\mathrm{OH})_{2}\right]$, copper pyrite contains both copper and iron.