13.
Crystals having low melting points are in
Answer : C. metallic bond
14.
Which of the following is not a property of crystalline solid?
Answer : B. Isotropy
15.
What is the maximum proportion of volume available in FCC arrangement of spheres?
Answer : C. 26%
16.
Which of the following compounds has hexagonal structure?
Answer : A. Graphite
17.
Which of the following compounds is an example of network solid?
Answer : A. Carborundum
18.
When a cation leaves its normal position in the crystal and moves to some interstitial space, the defect in the crystal is known as
Answer : D. Frenkel defect
