Which of these metals are obtained by electrolysis of their molten chlorides: sodium, calcium, iron and copper?
A. iron and copper
B. sodium and calcium
C. sodium and copper
D. calcium and copper
Answer:B
Which of these metals are obtained by electrolysis of their molten chlorides: sodium, calcium, iron and copper?
A. iron and copper B. sodium and calcium C. sodium and copper D. calcium and copper