Calamine ore can be used to extract one of the following metals. This metal is:

72 Which of the following alloys contains mercury as one of the constituents? 73 Which of the following is an ore of mercury metal?

Options||A. rock salt

B. cinnabar

C. calamine

D. haematite

75 Which of the following pair of metals exists in their native state in nature? 76 Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?