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The Solid State
True Or False
191.
AgBr can show both Schottky and Frenkel defect. State True or False
162 Views
192.
In the crystal structures of sodium chloride, the arrangement of CI
–
ions is bcc.
A.
False
187 Views
193.
In hcp and ccp structures, only 68% of the total space is filled by atoms.
A.
False
230 Views
194.
Dimagnetic substances are strongly attracted by magnetic field.
A.
False
257 Views
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195.
The size of an octahedral hole is less than that of tetrahedral hole.
A.
False
210 Views
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196.
When electrons are trapped in the crystal in the anionic vacancy, the defect is known as F-centres.
A.
True
303 Views
197.
On doping Ge metal with a little of In (Indium) we get p-type semi-conductor.
A.
True
287 Views
198.
In the CaF
2
structure, the coordination number of cations and anions are respectively 4 and 8.
A.
True
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Multiple Choice Questions
199.
The number of atoms in a face-centred cubic unit cell is:
4
6
1
2
349 Views
200.
Schottky defect generally appears in
NaCl
KCl
CsCl
all the above
420 Views
19
20
21
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