SOLID-STATE-QUIZ-2

Solid State Quiz-2

Dear Readers,

The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry..

Q1. With which one of the following element silicon should be doped so as to give p-type

semiconductor?

•  As
•  Se
•  B
•  Ge

Solution
Ge and Si are doped with gp 13(boron) element to give p-type conductor.

Q2.Percentage of free space in a body-centred cubic unit cell is :

•  32%
•  34%
•  28%
•  30%

Solution
Packing fraction in bcc is 68% and thus, empty space is 32%.

Q3.  Crystals can be classified into ……. Basic crystal habits.

•  7
•  4
•  14
•  3

Solution
The seven basic crystal lattice are cubic, tetragonal, orthorhombic, monoclinic, hexagonal, rhombohedral and triclinic.

Q4. A compound CuCl has face centred cubic structure. Its density is 3.4 g cm−3. The length of unit cell is :

•  5.783Å
•  6.783Å
•  7.783Å
•  8.783Å

Solution
Molecular mass of CuCl=99

n=4 for face centred cubic cell 

Q5.Among the following types of voids, which one is the largest void?

•  Triangular
•  Cubic
•  Tetrahedral
•  Octahedral

Solution
 The vacant spaces between the spheres in closed packed structures is called void. The voids are of two types, tetrahedral voids and octahedral voids. Also, radius of tetrahedral voids and octahedral voids are

and  respectively. Thus, octahedral void is larger than tetragonal void. 

Q6. A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. The

diameter of the metal atom is :

•  144 pm
•  204 pm
• 288 pm
•  408 pm

Solution

Q7.The oxide that possesses electrical conductivity :

• 
• 
•  NiO
•  MnO

Solution
 is metallic conductor , NiO and MnO are insulators. 

Q8.The three states of matter are solid, liquid and gas, which of the following statements are correct

about them?

•  Gases and liquids have viscosity as a common property
•  The molecules in all the three states possess random translational motion
•  Gases cannot be converted into solids without passing through the liquid phase
•  Solids and liquids have vapour pressure as a common property

Solution
The facts reported in b, c, d are wrong.

Q9.Which one of the following is a covalent crystal?

•  Rock salt
•  Ice
•  Quartz
•  Dry ice

Solution
Quartzis a covalent crystal.

Q10. 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

•  8
•  6
•  4
• 9

Solution
There are four body diagonals. Atoms on the body diagonals are not shared by any other unit cell. Contribution by atoms on corners=8×1/8=1 and 

Contribution by atoms on body diagonal=2×4=8

 Hence, total number of atoms = 9