Topic: Solid State, Test No.: 07, Total MCQs: 10
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Question 1 |
To get n-type
doped semiconductor, the impurity to be added to silicon should have the
following number of valence electrons?
1 | |
2 | |
3 | |
5 |
Question 2 |
Density of a crystal remains
unchanged as a result of
Vacancy defect | |
Interstitial defect | |
Frankel defect | |
Schottky defect |
Question 3 |
What is the coordination number of body centred cube?
4 | |
6 | |
8 | |
12 |
Question 4 |
What is the
co-ordination number of sodium in Na2O?
8 | |
6 | |
4 | |
2 |
Question 5 |
Which is not the
correct statement for ionic solids in which positive and negative ions are held
by strong electrostatic attractive forces?
The radius ratio increases as coordination number increases | |
As the difference in size of ions increases coordination number increases | |
When coordination number is eight, the radius ratio lies between 0.225 to 0.414 | |
In ionic solid of the
type AX (ZnS, Wurtzite) the coordination number of Zn2+ and S2–
respectively are 4 and 4 |
Question 6 |
Which
of the following statements about amorphous solids is incorrect?
They melt over a range of temperature. | |
They are rigid and incompressible. | |
There is no orderly arrangement of particles. | |
They are anisotropic. |
Question 7 |
Which one of the
following compound exhibits both Schottky and Frenkel defects?
NaCl | |
AgCl | |
AgBr | |
AgI |
Question 8 |
Which
one of the following defects in the crystals lowers its density?
F-centres | |
Schottky defect | |
Frenkel defect | |
Interstitial defect |
Question 9 |
Which one of the following
is a covalent crystal?
Dry ice | |
Rock salt | |
Ice | |
Quartz |
Question 10 |
The ability of a
given substance to assume two or more crystalline structure is called
polymorphism | |
isomorphism | |
amorphous | |
isomerism |
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