Which of the following is an alloy?

Which of the following elements is a semiconductor?

What is formed when boiling sulfur reacts with dihydrogen gas?

Why is sodium chloride soluble in water but not soluble in kerosene?

Galvanisation is a method of protecting:

During the extraction of metals,electrolytic refining is used to obtain pure metals.
$(a)$ Which material will be used as the anode and cathode for the refining of silver metal by this process?
$(b)$ Suggest a suitable electrolyte as well.
$(c)$ In this electrolytic cell,where do we get pure silver after passing an electric current?