Tag: the solid state
Questions Related to the solid state
Which kind of defect is shown by the given crystal?
${ K }^{ + }$ ${ Cl }^{ - }$ ${ K }^{ + }$ ${ Cl }^{ - }$ ${ K }^{ + }$ ${ Cl }^{ - }$
${ Cl }^{ - }$ $\Box $ ${ Cl }^{ - }$ ${ K }^{ + }$ $\Box $ ${ K }^{ + }$
${ K }^{ + }$ ${ Cl }^{ - }$ $\Box $ ${ Cl }^{ - }$ ${ K }^{ + }$ ${ Cl }^{ - }$
${ Cl }^{ - }$ ${ K }^{ + }$ ${ Cl }^{ - }$ ${ K }^{ + }$ $\Box $ ${ K }^{ + }$
The appearance of colour in solid alkali metal halides is generally due to:
How many defects exists in the arrangement of constituent particles of $7.45\ g$ $KCl$?
$[k=39,Cl=35.5gm/mole]$
Select the incorrect statement :
Which of the following defect is seen in $FeO$?
In a crystal, at $827^{\circ}C$, one out of $10^{10}$ lattice site is found to be vacant, while in the same solid, one out of $2 \times 10^9$ lattice site is found to be vacant at $927^{\circ}C$. What is the enthalpy of vacancy formation in kJ/mol unit?
Calcium crystallizes in a face centred cubic unit cell with a $=0.556$ nm. Calculate the density if it contains:
(ii) $0.1\%$ Schottky defect
Statement 1: KCl is more likely to show schottky defect while Lil is more likely to show Frenkel defect.
Statement 2: Schottky defect is more likely in ionic solids in which cations and anions are of comparable size while Frenkel defect is more likely is which cations and anions have large differences in their ionic sizes.
Statement-I: Solids having more $F-$centres possess intense colours.
Statement-II: Excess of $Na^{+}$ in $NaCl$ solid having F-centres makes it appear to pink.
Which of the following statements are correct?