Chemistry chapter 1 Solid State

 

Test on Solid State

20 Marks Time: 45 min

Q.no.1) Multiple choice question                        of  3M

i) In body centered cubic structure the space occupied is about         a) 68%    b) 53%    c) 38%    d) 32%

ii) Close packing is maximum in the crystal lattice of     a) Simple cubic    b) Face centered     c) body centered    d) none 

iii) The major binding force in diamond is     a) Covalent bond    b) ionic bond    c) metallic bond     d) co-ordinate covalent bond

Section B

Q.No.2) Solve any Two                     4M

i) Differentiate between tetrahedral and octahedral voids.

ii) A compound is formed by two elements M and N. The elements N formed ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound?

iii) Explain Schottky defect with example.

Section C

Q.No.3) Solve any Three                  9M

i) Explain defects in crystal structure.

ii) Differentiate between Crystalline and Amorphous solids

iii) Differntiate p and n types of conductors.

iv) The edge length of the unit cell of Ta, is 330.6 pm; the unit cell is body-centered cubic. Tantalum has a density of 16.69 g/cm³.

(a) calculate the mass of a tantalum atom.
(b) Calculate the atomic weight of tantalum in g/mol.

Section D

Q.No. 4) Solve any One                 4M

i) Derive expression for Density of Simple cubic and Body centered cell.

ii) Give seven systems of crystal lattice with their edge length and angle specifications.