What is the atomic number of sulphur?

From amongst the metals sodium,calcium,aluminium,copper and magnesium,name the metal:
$(i)$ which reacts with water only on boiling,and
$(ii)$ another which does not react even with steam.

What happens when a glass rod dipped in concentrated hydrochloric acid is brought near a container filled with ammonia gas?

Which of the following reactions does $NOT$ occur during the extraction of iron in a blast furnace?

During which reaction is dihydrogen gas not produced under normal conditions?

During the extraction of iron from hematite in a blast furnace,which substance is obtained as slag?