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Which type of defect has the presence of...

Which type of defect has the presence of cations in the interstitial sites ?

A

Frenkel defect

B

Metal deficiency defect

C

Schottky defect

D

Vacancy defect

Text Solution

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The correct Answer is:
A
Properties of ionic solid
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Which type of 'defect' has the pressence of cations in the interstitial sites?

Assertion (A) : Non-stoichiometric compounds are called Bertholide compounds. NaCl and KCl crystal, when heated in an atmosphere of Na and K varpours, respectively, they impart violet and yellow colours to NaCl and KCl , respectively. Reason (R ) : Metal excess defect is due to the presence of extra cations atg the interstitial sites. The excess metal ions move to the interstitial sites and the electrons to the neighbouring sites. The colour results byt the excitation of these electrons by absorbing suitable energy from visible light. When the excited electroon comes back to the ground state, there is emission of radiation in the visible region and gives complimentary colour.

Cations are present in the interstitial sites in …………… .

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Impurity Defect Questions|Non-Stoichiometric Defect|Questions|Metal Excess Defect Due To The Presence Of Extra Cations At Interstitial Sites|Summary

Impurity Defect Questions|Summary|Non-Stoichiometric Defect|Metal Excess Defect Due To The Presence Of Extra Cations At Interstitial Sites|Questions

In crystalline solids, few of the cations moved from their positions into the interstitial position . The defect is called as