31. What is the chemical symbol for iron?
A) Au
B) Ag
C) Fe
D) Cu
Answer: C) Fe
32. Which metal is used to make steel?
A) Copper
B) Zinc
C) Iron
D) Aluminium
Answer: C) Iron
33. Which metal is used in the manufacture of batteries?
A) Nickel
B) Silver
C) Gold
D) Copper
Answer: A) Nickel
34. What is the symbol for the element silver?
A) Ag
B) Au
C) Cu
D) Fe
Answer: A) Ag
35. Which metal is used in the manufacture of electrical wires?
A) Copper
B) Aluminium
C) Zinc
D) Iron
Answer: A) Copper
