Topic: Solid State, Test No.: 03, Total MCQs: 10
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Question 1 |
A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm–3. The molar mass of the metal is
(NA Avogadro's constant = 6.02 × 1023 mol–1) [NEET 2013]
40 g mol–1 | |
30 g mol–1 | |
27 g mol–1 | |
20 g mol–1 |
Question 2 |
A compound formed
by elements A and B crystallizes in the cubic structure where A atoms are at
the corners of the cube and B atoms are at the face centres. The formula of the
compound is
AB3 | |
AB | |
A3B | |
A2B2 |
Question 3 |
A metallic crystal
having bcc type staking pattern, what percentage of volume of this lattice is
empty space?
68% | |
32% | |
26% | |
74% |
Question 4 |
A p-type material
is electrically
positive | |
negative | |
neutral | |
depends upon the concentration of p-impurities |
Question 5 |
A solid compound
contains X, Y and Z atoms in a cubic lattice with X atoms occupying the
corners, Y atoms in the body centred position and Z atoms at the centres of
faces of the unit cell. What is the empirical formula of the compound?
XY2Z3 | |
XYZ3 | |
X2Y2Z3 | |
X8YZ6 |
Question 6 |
A substance AxBy
crystallizes in a face centred cubic (fcc) lattice in which atoms 'a' occupy
each corner of the cube and atoms ‘B’ occupy the centres of each face of the
cube. Identify the correct composition of the substance AxBy:
AB3 | |
A4B3 | |
A3B | |
Composition cannot be specified |
Question 7 |
A unit cell of
sodium chloride has four formula units. The edge length of the unit cell is
0.564 nm. What is the density of sodium chloride?
1.2 g/cm3 | |
2.16 g/cm3 | |
3.64 g/cm3 | |
4.56 g/cm3 |
Question 8 |
AB is an ionic solid. If the ratio of ionic radii of A+
and B– is 0.52. What is the coordination number of B–?
6 | |
3 | |
2 | |
8 |
Question 9 |
For a crystal, the angle of diffraction (2θ) is 90° and the
second order line has a d value of 2.28Å. The wavelength (in Å) of X-rays used
for Bragg's diffraction is
2.28 | |
2.00 | |
1.613 | |
4.00 |
Question 10 |
If AgI
crystallizes in zinc blende structure with I- ions at lattice points, what
fraction of tetrahedral voids is occupied by Ag+ ions?
25% | |
50% | |
100% | |
75% |
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