Introduction to Material Science » Exercise – 1
11. Aluminium is :
(a) Silvery white in colour
(b) Yellow in colour
(c) Reddish in colour
(d) Pale yellow in colour
12. The main constituents of glass is :
(a) SiO2
(b) B2O3
(c) Al2O3
(d) Cr2O3
13. Micanite is a form of :
(a) Built up mica
(b) Hydrated potassium aluminium silicate
(c) Magnesium mica
(d) Calcium mica
14. Which of the following material has the highest melting point :
(a) Copper
(b) Aluminium
(c) Tungsten
(d) Gold
15. Insulators have :
(a) A full valence band
(b) An empty conduction band
(c) A large energy gap
(d) All the above
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