Solid State Physics - Physical Sciences MCQ Questions for CSIR NET, GATE

In this article, we have brought to you 25 MCQ questions on Physics chapter "Solid State Physics". If you are preparing for CSIR NET Physics exam. Practice these questions in the format of a quiz.

MCQ Questions - Solid State Physics

Q1. Metallic lithium has bcc crystal structure. Each unit cell is a cube of side a. The numbers of atoms per unit volume is:

1 2 3 4

Q2. For the given unit cells of a two dimensional square lattice, which option lists are the primitive cells?

1 2 3 4

Q3. Hard discs of radius R are arranged in a twodimensional triangular lattice. What is the fractional area occupied by the discs in the closests possible packing?

1 2 3 4

Q4. The fraction of volume unoccupied in the unit cell of the body centered cubic lattice is

1 2 3 4

Q5. Diamond lattice can be considered as a combination of two fee lattices displaced along the body diagonal by one quarter of its length. There are eight atoms per unit cell. The packing fraction of the diamond structure is

1 2 3 4

Q6. The ratio of the second-neighbour distance to the nearest-neighbour distance in an fcc lattice is:

1 2 3 4

Q7. The total number of Na+ and Cl– ions per unit cell of NaCl is:

1 2 3 4

Q8. In a single layer of graphite, called graphene, the carbon atoms from a hexagonal lattice (see figure). How many carbon atoms are there in a unit cell of the lattice?

1 2 3 4

Q9. Consider the crystal structure of sodium chloride which is modeled as a set of touching spheres. Each sodium atom has a radius r1 and each chlorine atom has a radius r2. The centres of the spheres form a simple cubic lattice. The packing fraction of this system is

1 2 3 4

Q10. A narrow beam of X-rays with wavelength 1.5Å is reflected from an ionic crystal with an fcc lattice structure with a density of 3.32 g cm–3. The molecular weight is 108 AMU (1 AMU = 1.66 × 10– 24g).

(A) The lattice constant is:

1 2 3 4

Q11. Based on Q10.

The sine of the angle corresponding to (111) reflection is:

1 2 3 4

Q12. A metal with body centered cubic (bcc) structure show the first (i.e. smallest angle) diffraction peak at a Bragg angle of θ = 30°. The wavelength of X-ray used is 2.1 Å. The volume of the PRIMITIVE unit cell of the metal is

1 2 3 4

Q13. X-ray of wavelength λ = a is reflected from the (1 1 1) plane of a simple cubic lattice. If the lattice constant is a, the corresponding Bragg angle (in radian) is

1 2 3 4

Q14. Sodium chloride (NaCl) crystal is a face centred cubic lattice, with a basic consisting of Na+ and Cl– ions separated by half the body diagonal of a unit cube. Which of the planes corresponding to the miller indices given below will not give rise to Bragg reflection of X - ray?