Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 21

21. Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?[2010]

(a) metallic bonding

(b) van der Waal’s bonding

(c) ionic bonding

(d) covalent bonding

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Answer:

Correct Answer: 21. (a)

Solution:

  1. (a) For a metal, conductivity decreases with increase in temperature.

Also, metal has high melting point.



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