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The Solid State

Question 53
CBSEENCH12005401
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What are lattice defects imperfection?

Solution
lattice defect can be define as combination of Line defects and plane defects together are called lattice defects.
Question 54
CBSEENCH12005402
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what is Frenkel defect.Why is Frenkel defect found in AgCl ?

Solution
Frenkel Defect: This defect is shown by ionic solids. The smaller ion (usually cation) is dislocated from its normal site to an interstitial site . It creates a vacancy defect at its original site and an interstitial defect at its new location.
 Frenkel defect is shown by ionic substance in which there is a large difference in the size of ions so it is due to difference in size of Ag+ and CI–, Ag+ occupies voids.
Question 55
CBSEENCH12005403
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What  type of void are developed in hexagonal close packing?

Solution
In hexagonal close packing octahedral void as well as tetrahedral void are produced.
Question 56
CBSEENCH12005404
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What is the co-ordination number of an octahedral void?

Solution
The co-ordination number of an octahedral void  is  6 : 6.

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