Question 1 :
An ionic compound is expected to have tetrahedral structure if <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead48a9381c2135355c6d14"> lies in the range of

Question 2 :
In a face centred cubic lattice the number of nearest neighbours for a given lattice point are :

Question 3 :
The percentage of {tex} \mathrm { Fe } ^ { + 3 } {/tex} ion present in {tex} \mathrm { Fe } _ { 0.93 } \mathrm { O } _ { 1.00 } {/tex} is

Question 4 :
Which of the following does not represent a type of crystal system?<br>

Question 6 :
How many unit cells are present in {tex} 39 \mathrm { g } {/tex} of potassium that crystallises in body centred cubic structure? [At. wt. of {tex} \mathrm { K } = 39 {/tex} ]

Question 7 :
The edge length of a face centred cubic cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anions is

Question 8 :
A metal crystallises into a lattice containing a sequence of layers as AB AB AB _______. What percentage of voids are left in the lattice?

Question 11 :
If we mix a pentavalent impurity in a crystal lattice of germanium, what type of semiconductor formation will occur?

Question 13 :
The unit cell of a binary compound of $A$ and $B$ metals has a ccp structure with $A$ atoms occupying the corners and $B$ atoms occupying the centers of each face of the cubic unit cell. If during the crystallization of this alloy, in the unit cell two $A$ atoms are missed, the overall composition per unit cell is:

Question 15 :
In a crystal some ions are missing from normal sites. This is an example of :