Identify the set in which all the three materials are good conductors of electricity (a) Cu, Hg and NaCl (b) Cu, Ge and Hg (c) Cu, Ag and Au (d) Cu, Si and diamond

Answer: (c). NaCl (solid) is an ionic insulator; Ge and Si are semiconductors; diamond is an insulator. Cu, Ag and Au are all metals with many free electrons. So the answer is (c) Cu, Ag and Au.

Identify the set in which all the three materials are good conductors… | NEET 1994 (AIPMT)

Q79NEET 1994 · AIPMTEasy

Ohm's Law, Resistivity & Temperature

Identify the set in which all the three materials are good conductors of electricity

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Answer: (c)

NaCl (solid) is an ionic insulator; Ge and Si are semiconductors; diamond is an insulator.
Cu, Ag and Au are all metals with many free electrons.
So the answer is (c) Cu, Ag and Au.

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