The only incorrect effect on density by the given defect in solids isDensity must decrease by vacancy defectDensity must increase by the interstitial defectDensity must increase by impurity defectDensity does not change by dislocation defect

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Standard XII

Physics

Elasticity

The only inco...

Question

The only incorrect effect on density by the given defect in solids is

Density must decrease by vacancy defect

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Density must increase by the interstitial defect

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Density must increase by impurity defect

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Density does not change by dislocation defect

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Which of the following statements are not true?

(a) Vacancy defect results in a decrease in the density of the substance

(b) Interstitial defects result in an increase in the density of the substance

(d) Frenkel defect results in an increase in the density of the substance

Match the defects given in Column I with the statements in given Column II.

$\begin{matrix} C o l u m n I & C o l u m n I I A . & s i m p l e v a c a n c y d e f e c t & 1. S h o w n b y n o n - i o n i c s o l i d s a n d i n c r e a s e s d e n s i t y o f t h e s o l i d B . & S i m p l e i n t e r s t i t i a l d e f e c t & 2. S h o w n b y i o n i c s o l i d s a n d d e c r e a s e s d e n s i t y o f t h e s o l i d c . & F r e n k e l d e f e c t & 3. S h o w n b y n o n - i o n i c s o l i d s a n d d e n s i t y o f t h e s o l i d d e c r e a s e s D . & S c h o t t k y d e f e c t & 4. S h o w n b y i o n i c s o l i d s a n d d e n s i t y o f t h e s o l i d r e m a i n s t h e s a m e \end{matrix}$

Which of the following defects decrase the density ?

(a) Interstitial defect (b) Vacancy defect

Q. Match the defects given in column I with statements given in column II and mark the appropriate choice.

	Column I		Column II
(A)	Simple vacancy defect	(i)	Shown by non-ionic solids and increases the density of the solid.
(B)	Simple interstitial defect	(ii)	Shown by ionic solution and decreases the density of the solid
(C)	Frenkel defect	(iii)	Shown by non-ionic solids and decreases the density of the solid
(D)	Schottky defect	(iv)	Shown by ionic solids and density of the solid remains the same

Q. Vacancy defects and interstitial defect are shown by ionic solids

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