Metals

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56. Which of the following metals is used as a coating for iron and steel to prevent rusting?
a) Zinc
b) Copper
c) Aluminium
d) Silver

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57. Which of the following metals is used in dental fillings?
a) Copper
b) Aluminium
c) Mercury
d) Silver

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58. Which of the following metals is used as a superconductor at very low temperatures?
a) Iron
b) Copper
c) Aluminium
d) Mercury

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59. What is the main use of magnesium?
a) Manufacturing of steel
b) Making batteries
c) Construction
d) Producing fireworks

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60. Which of the following metals is used in the production of semiconductors?
a) Gold
b) Silver
c) Copper
d) Silicon

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