Among the following,the incorrect statement i | vedclass

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(D) The correct answer is $D$. In metals,electrical conductivity decreases with an increase in temperature due to the increased vibrations of metal io

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Electrical conductivity of semiconductors and metals increases with increase in temperature.

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(D) The correct answer is $D$. In metals,electrical conductivity decreases with an increase in temperature due to the increased vibrations of metal ions,which scatter electrons. In semiconductors,conductivity increases with temperature due to the excitation of more electrons from the valence band to the conduction band. Therefore,the statement that conductivity of both metals and semiconductors increases with temperature is incorrect.

List-$I$	List-$II$
$A$. $ABCABC...$ layers	$I$. $F$-centres
$B$. Thermodynamics defects	$II$. $X$-ray diffraction
$C$. $Farbenzenter$	$III$. Vacancy defects
$D$. $Debye-Scherrer$ method	$IV$. Semiconductors
	$V$. Silver

Among the following,the incorrect statement is:

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Match the following:
List-$I$ List-$II$
$A$. $ABCABC...$ layers $I$. $F$-centres
$B$. Thermodynamics defects $II$. $X$-ray diffraction
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$D$. $Debye-Scherrer$ method $IV$. Semiconductors
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$A$ mixture of $KCl$ and $KF$ is added to sodium chloride.

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