NCERT Chemistry Class 12 The Solid State - Chapter 1 Quiz 1

1. Which of the following is a crystalline solid?

Rubber

Glass

Salt

Plastic

2. Which type of unit cell has atoms at the corners and at the center of the cell?

Primitive cubic

Body-centered cubic

Face-centered cubic

Tetragonal

3. The coordination number in a hexagonal close-packed (hcp) structure is

6

8

12

4

4. Tetrahedral voids are formed when how many spheres surround a void?

2

3

4

6

5. Which type of solid is held together by a 'sea of electrons'?

Covalent solid

Ionic solid

Molecular solid

Metallic solid

6. A point defect where an atom is missing from its regular position is called a

Interstitial defect

Vacancy defect

Non-stoichiometric defect

Dislocation defect

7. Which type of solid does diamond represent?

Ionic solid

Molecular solid

Metallic solid

Covalent solid

8. The packing efficiency of a face-centered cubic (fcc) structure is closest to

52%

68%

74%

80%

9. Which of the following is an example of a paramagnetic material?

Fe

Cu

Na

Mg

10. In which type of defect are cations missing from the lattice, creating a non-stoichiometric composition?

Metal excess defect

Interstitial defect

Metal deficiency defect

Vacancy defect

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