Which of the following is not a metalloid?

Write the chemical equations for the reactions of zinc granules with:
$(i)$ Sulphuric acid
$(ii)$ Hydrochloric acid
$(iii)$ Aluminium chloride
$(iv)$ Sodium hydroxide
$(v)$ Nitric acid

State whether the following statement is true or false:
Copper does not burn in air, but the hot metal is coated with a black-coloured layer of copper $(II)$ oxide.

Which of the following non-metals exists in a solid state at room temperature?

State reasons for the following:
$(i)$ Metals are good conductors of heat.
$(ii)$ Addition of some silver to pure gold for making ornaments.
$(iii)$ Inability of non-metals to displace hydrogen from dilute sulphuric acid.

What is the basic raw material used in the Contact Process for the production of sulfuric acid?