Question 2 :
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 3 :
Number of atoms in the unit cell of Na(bcc type crystal) and Mg(fcc type crystal ) are respectively
Question 5 :
An element {tex}\mathrm X{/tex} crystallises in {tex}\mathrm {BCC}{/tex} lattice. The edge length of unit cell is {tex}5\mathrm A{/tex}. If molar mass of {tex}\mathrm X{/tex} is {tex} 125 \mathrm { g } \mathrm { mol } ^ { - 1 } {/tex}, then calculte density of crystal.
Question 6 :
The phenomenon in which crystals on subjecting to a pressure or mechanical stress produce electricity is called :
Question 10 :
The percentage of {tex} \mathrm { Fe } ^ { + 3 } {/tex} ion present in {tex} \mathrm { Fe } _ { 0.93 } \mathrm { O } _ { 1.00 } {/tex} is
Question 11 :
In a crystal some ions are missing from normal sites. This is an example of :
Question 12 :
In the laboratory, sodium chloride is made by burning sodium in the atmosphere of chlorine. The salt obtained is yellow in colour. The cause of yellow colour is:
Question 13 : The number of atoms <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead480286ab836963762e0f"> contained within a cubic cell is :
Question 14 :
Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be :
Question 15 :
If we mix a pentavalent impurity in a crystal lattice of germanium, what type of semiconductor formation will occur?
Question 17 : Consider the following fcc unit cells choose the correct option<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ef6e381f5ca3c63ed733afa"><br>
Question 18 :
Crystals which are good conductor of electricity and heat are known as :
Question 19 :
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 20 : The unit cell with the structure below refers tocrystal system.<br> <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead483c381c2135355c6cba">
Question 24 :
Which is the wrong statement regarding a crystal containing Schottky defect?
Question 26 :
The number of hexagonal faces that are present in a truncated octahedron is
Question 28 :
The phenomenon in which polar crystals on heating produce electricity is called :
Question 29 :
In a face centred cubic lattice the number of nearest neighbours for a given lattice point are :
Question 31 :
Among the following types of voids, which one is the largest void?
Question 33 : The number of atoms <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead480286ab836963762e0f"> contained within a body centred cubic cell is:
Question 35 : A metallic element crystallises into lattice containing a sequence of layers of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead484e86ab836963762e5a"> . Any packing of spheres leaves out void in the lattice. The empty space in percentage by volume in this lattice is :
Question 36 :
The oxide which shows transition from metal to insulation, <i>i.e</i>., semiconductors are :
Question 38 :
In a cubic close packing of spheres in three dimensions, the co-ordination number of each sphere is :
Question 41 :
The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disappears. The behavior is a characteristic of substance forming :
Question 42 :
How many number of atoms are there in a cube based unit cell having one atom on each corner and two atoms on each body diagonal of cube
Question 44 :
In a cubic close packing of spheres in three dimensions, the co-ordination number of each sphere is :
Question 48 :
The three states of matter are solid, liquid and gas, which of the following statements are correct about them?
Question 49 : 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 50 : In crystal structure of rock salt <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead48a9381c2135355c6d15"> , the arrangement of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead483041e6ca4117817d30"> ion is :
