41. Which metal is used in the manufacture of dental fillings?
A) Gold
B) Silver
C) Mercury
D) Copper
Answer: A) Gold
42. Which metal is used in the manufacture of musical instruments like trumpets and trombones?
A) Copper
B) Aluminium
C) Nickel
D) Zinc
Answer: A) Copper
43. What is the symbol for the element lead?
A) Pb
B) Ag
C) Cu
D) Fe
Answer: A) Pb
44. Which metal is used in thermometers due to its low melting point?
a) Iron
b) Mercury
c) Copper
d) Zinc
Answer: b) Mercury
45. Which of the following metals is not magnetic?
a) Iron
b) Nickel
c) Cobalt
d) Copper
Answer: d) Copper
