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:
- (a) For a metal, conductivity decreases with increase in temperature.
Also, metal has high melting point.
