10 QA on solids and crystals

10 QA on solids and crystals | Learn Physics

10 Question-answer on solids and crystals

1. Which of the following is a crystalline solid

(a) Graphite

(b) Calcite

(d) Oxygen

Ans: (b)

2. According to Bravis, the number of possible space lattice is

(a) 18

(b) 16

(d) 10

Ans: (c)

3. Which of the following is not the property of a crystalline solid?

(a) Sharp melting point

(b) Flat faces

(d) Long range order

Ans: (c)

4. The space lattice of diamond is:

(a) Fcc

(b) Bcc with two atoms per unit cell

(d) Simple cubic

Ans: ( a)

5. Which one of the following is the weakest kind of bonding in solids

(a) Ionic

(b) Metallic

(d) Covalent

Ans: (c)

6. If there are 4 atoms per unit cell in a solid, the crystal is:

(a) Simple cubic

(b) Body centred cubic

(d) End centred cubic

Ans: ( c)

7. Which of the following has minimum portion of available volume, filled by hard spheres arranged in various structures?

(a) Simple cubic

(b) Face centred cubic

(d) Diamond

Ans: (b,d)

8. The coordination number is the number of the

(a) Closest neighboring atoms in a crystal structure

(b) Atoms per unit volume

(d) Atoms per lattice

Ans: (a)

9. If the physical properties of solids do not depend on the direction, then solid is known as

(a) Anisotropic

(b) Isotropic

(d) Allotropic

Ans: ( b)

10. If the physical properties of solids depend upon the direction, the property of the crystal is called

(a) Anisotropic

(b) Isotropic

(d) Allotropic

Ans: ( a)

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