In which state does the element phosphorus exist at room temperature?

Define an alloy. How is an alloy prepared?

Which substance is used for the chemical reduction of metal oxides like chromium and manganese to obtain the metal?

Which of the following methods is $NOT$ a method for the refining of metals?

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.

Which metal is available in the highest proportion on the earth's crust?