Topic: Solid State, Test No.: 04, Total MCQs: 10
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Question 1 |
If the distance between Na+ and Cl–
ions in sodium chloride crystal is X pm, the length of the edge of the unit
cell is
4 X pm | |
2 X pm | |
X/2 pm | |
X/4 pm |
Question 2 |
If Z is the number
of atoms in the unit cell that represents the closest packing sequence ABC ABC
_____, the number of tetrahedral voids in the unit cell is equal to
Z | |
2Z | |
Z/2 | |
Z/4 |
Question 3 |
In a face centred
cubic (fcc) arrangement, the number of atoms per unit cell is
8 | |
4 | |
2 | |
1 |
Question 4 |
In a face centred cubic lattice, atom A occupies the corner
positions and atom B occupies the face centre positions. If one atom of B is
missing from one of the face centred points, the formula of the compound is
A2B5 | |
A2B | |
AB2 | |
A2B3 |
Question 5 |
In a triclinic
crystal:
a = b = c, a = b = g ≠ 90° | |
a ≠ b = c, a = b = g = 90° | |
a ≠ b ≠
c, a ≠ b ≠ g
≠ 90° | |
a ≠ b ≠
c, a = g = 90° ≠ b |
Question 6 |
In AgBr, there can
occur
only Schottky defect | |
only Frenkel defect | |
Both (a) and (b) | |
Neither (a) nor (b) |
Question 7 |
In an antifluorite structure, cations occupy
tetrahedral voids | |
centre of cube | |
octahedral voids | |
corners of cube |
Question 8 |
In Na2O
having antifluorite structure
Oxide ions have a
cubic close packed arrangement and Na+ occupy all the eight tetrahedral
voids. | |
Oxide ions have a
cubic close packed arrangement and Na+ occupy all the octahedral
voids | |
Na+ ions
have a cubic close arrangement and O2- occupy all the octahedral voids | |
Na+ ions
have a cubic close arrangement and O-2 occupy all the tetrahedral voids. |
Question 9 |
In NaCl crystal each Cl– ion is surrounded by
4Na+ ions | |
6Na+ ions | |
1Na+ ions | |
2Na+ ions |
Question 10 |
Match Column A with B and select the correct option.
Column A | Column B | ||
A. | Ionic solid | I. | NaCl |
B. | Metallic solid | II. | Fe |
C. | Covalent solid | III. | C (graphite) |
D. | Molecular solid | IV. | Dry ice |
A - II, B - I, C - IV, D - III | |
A - I, B - II, C - III, D - IV | |
A - III, B - II, C - I, D - IV | |
A - II, B - IV, C - I, D - III |
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