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GATE 2020 MT – Question 49

Materials Science and Non-Metallic Materials · Electronic and magnetic properties · 2 marks · Multiple choice

Match elements P copper, Q iron, R mercury, S silicon to electronic behaviour 1 ferromagnetic, 2 superconducting, 3 semiconducting, 4 diamagnetic.

  1. P–3, Q–4, R–1, S–2
  2. P–1, Q–3, R–2, S–4
  3. P–4, Q–1, R–2, S–3
  4. P–4, Q–1, R–3, S–2

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Show answer and explanation

Correct answer: (C) P–4, Q–1, R–2, S–3

Explanation

Copper is diamagnetic, P–4. Iron is ferromagnetic under the usual stated-temperature convention, Q–1. Mercury is the listed superconducting element below its critical temperature, R–2. Silicon is a semiconductor, S–3. Therefore C; the classifications assume their appropriate temperature regimes rather than implying mercury superconducts at room temperature.

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