21. Which metal is used to make magnets?
a) Copper
b) Iron
c) Aluminum
d) Nickel
Answer: b) Iron
22. Which metal is used to make surgical implants?
a) Titanium
b) Iron
c) Copper
d) Aluminum
Answer: a) Titanium
23. What is the most abundant metal in the Earth’s crust?
A) Iron
B) Aluminium
C) Copper
D) Zinc
Answer: B) Aluminium
Related Topics
24. Which metal is used to galvanize iron?
A) Copper
B) Zinc
C) Gold
D) Silver
Answer: B) Zinc
25. What is the symbol for the element gold?
A) Au
B) Ag
C) Fe
D) Cu
Answer: A) Au
