Which of the following statements is correct?

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(D) $1$. In a rock salt $(NaCl)$ structure,the edge length $a = 2(r^+ + r^-)$,so $r^+ + r^- = 0.5 \, a$. This statement is correct.$2$. In a $CsCl$ st

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All are correct

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(D) $1$. In a rock salt $(NaCl)$ structure,the edge length $a = 2(r^+ + r^-)$,so $r^+ + r^- = 0.5 \, a$. This statement is correct.$2$. In a $CsCl$ structure,the cation is at the body center and anions are at the corners. The body diagonal is $\sqrt{3} \, a = 2(r^+ + r^-)$,so $r^+ + r^- = \frac{\sqrt{3}}{2} \, a$. This statement is correct.$3$. In a zinc blende $(ZnS)$ structure,$Zn^{2+}$ ions occupy half of the tetrahedral voids,and $S^{2-}$ ions form an $fcc$ lattice. Both have a coordination number of $4$. Thus,the ratio is $4:4 = 1:1$. This statement is correct.$4$. Since all statements are correct,the correct option is $D$.

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

Similar Questions

Match the following:
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

Silver has an atomic radius of $144 \ pm$ and the density of silver is $10.6 \ g \ cm^{-3}$. Based on this information, identify the correct statement.

Which of the following is incorrectly matched?

Calculate the number of atoms present in $1.58 \ g$ of a metal that forms a $bcc$ structure,given that $\varrho \times a^3 = 1.58 \times 10^{-22} \ g$.

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