Prepare for NEET Chemistry The Solid State with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert insights into crystal lattice and packing.
Which crystal system has the highest symmetry?
Tetragonal
Orthorhombic
Hexagonal
Cubic
Which of the following defects in a crystal lattice would significantly increase its density?
Interstitial defect
Schottky defect
Frenkel defect
Vacancy defect
Ferromagnetic substances show a sharp decrease in magnetic susceptibility above a certain temperature known as:
Curie temperature
Néel temperature
Critical temperature
Transition temperature
In a body-centered cubic (BCC) arrangement of identical spheres, the number of nearest neighbors (coordination number) and the packing efficiency are:
6, 74%
8, 68%
12, 74%
4, 52%
Which one of the following statements is INCORRECT about hexagonal close packing (HCP)?
The coordination number is 12.
It has an ABAB... layer arrangement.
The packing efficiency is 68%.
It contains 6 atoms per unit cell.
The ratio of the number of tetrahedral voids to octahedral voids in a close-packed structure is:
1:1
1:2
2:1
4:1
In an ABAB... type of packing, a sphere in the third layer lies exactly above the sphere of the first layer. This type of arrangement is called:
Hexagonal close packing
Cubic close packing
Body-centered cubic packing
Simple cubic packing
Which of the following is NOT a characteristic of a Schottky defect?
Decreased density
Maintenance of stoichiometry
Vacancy of both cation and anion
Presence of interstitial atoms
Which of the following statements is INCORRECT regarding amorphous solids?
They lack long-range order.
They soften over a range of temperatures.
They are isotropic.
They have a sharp melting point.
A solid has a definite shape and volume. It is slightly compressible and is isotropic. Which type of solid is it most likely to be?
Ionic solid
Metallic solid
Covalent network solid
Amorphous solid
