Metals

46. What is the main use of copper?
a) Electrical wiring
b) Construction
c) Manufacturing of automobiles
d) Making jewelry

47. Which of the following metals is a good conductor of electricity?
a) Iron
b) Aluminium
c) Lead
d) Gold

48. Which of the following metals is used to make coins?
a) Iron
b) Silver
c) Aluminium
d) Zinc

49. What is the most commonly used metal in the production of steel?
a) Iron
b) Aluminium
c) Copper
d) Nickel

50. Which of the following metals is a noble metal?
a) Iron
b) Copper
c) Platinum
d) Aluminium