Question

can anyone check these answers
qno.1) name one metal and one non metal obtained in large quantities from the sea
2) name the process used for concentration of the sulphide ore
3). for the reduction of metal oxide to metal, suggested reducing agent cheaper than aluminium
the answers are attached in the image

Answer 1

yes it is right .....

Answer 2

Yeah all your answers are correct but I think the second one is froth flotation.