Which of the following property is generally not shown by metals?
(a) Electrical conduction
(b) Sonorous in nature
(c) Dullness
(d) Ductility
Ans. (c)
Properties of metals:
1. High melting point
2. Good conductors of electricity
3. Good conductors of heat
4. High density
5. Malleable
6. Ductile
7. Sonorous nature
8. Shiny (lustrous) in nature only when it is fresh. Metals lose their shine on keeping in air for a long time due to the formation of a thin layer of oxide, carbonate or sulphide on their surface.
Therefore option (C) is correct