Which metal is stored in kerosene?

Which metal oxide dissolves in water to form an alkali?

During the electrolytic refining of zinc,it gets :

What is German silver?

How many carats is pure gold?

Write chemical equations for the reactions taking place when:
$(i)$ iron is strongly heated in air.
$(ii)$ lead carbonate is calcined.
$(iii)$ chromium oxide $(Cr_{2}O_{3})$ is heated with aluminium powder.