Q11Multiple choice
Which of the following is not characteristic of ionic solids?
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Correct option: A
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Option (i) is the answer.
NCERT Exemplar · Class 12 · Chemistry
Chapter 1: Solid State
Practice each question, then open the answer or worked solution.
Questions
37 questionsQ12Written answer
Graphite is a good conductor of electricity due to the presence of __________.
(i) lone pair of electrons
(ii) free valence electrons
(iii) cations
(iv) anions
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Worked solution
Option (ii) is the answer.
Q13Multiple choice
Which of the following oxides behaves as a conductor or insulator depending
upon temperature?
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Correct option: C
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Option (iii) is the answer.
Q14Multiple choice
Which of the following oxides shows electrical properties like metals?
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Correct option: D
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Option (iv) is the answer.
Q15Written answer
The lattice site in a pure crystal cannot be occupied by _________.
(i) molecule
(ii) ion
(iii) electron
(iv) atom
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Option (iii) is the answer.
Q16Written answer
Graphite cannot be classified as __________.
(i) conducting solid
(ii) network solid
(iii) covalent solid
(iv) ionic solid
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Option (iv) is the answer.
Q17Written answer
Cations are present in the interstitial sites in __________.
(i) Frenkel defect
(ii) Schottky defect
(iii) Vacancy defect
(iv) Metal deficiency defect
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Option (i) is the answer.
Q18Written answer
Schottky defect is observed in crystals when __________.
(i) some cations move from their lattice site to interstitial sites.
(ii) the equal number of cations and anions are missing from the lattice.
(iii) some lattice sites are occupied by electrons.
(iv) some impurity is present in the lattice.
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Option (ii) is the answer.
Q19Multiple choice
Which of the following is true about the charge acquired by p-type
semiconductors?
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Correct option: B
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Option (ii) is the answer
Q20Written answer
To get a n-type semiconductor from silicon, it should be doped with a
substance with valence__________.
(i) 2
(ii) 1
(iii) 3
(iv) 5
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Worked solution
Option (iv) is the answer.