Solid State Chemistry and Physics
Comprehensive quiz covering crystal defects, electrical conductivity, semiconductor types, magnetic properties, and classification of solids in chemistry and physics
Questions
Irregularity in the arrangement of constituent particles in solids is called ________.
- Stoichiometric defect
- Crystal defect
- Vacancy defect
- Frenkel defect
- Impurities defect
Which of the following ionic solids shows both types of defects; Schottky and Frenkel defects?
- AgBr
- NaCl
- KCl
- CsCl
- AgI
Because of the interstitial defects, the number of atoms ___________ the number of lattice sites.
- decreases than
- becomes larger than
- equals to
- replaces
- none of these
When cation and anion both are missing from their regular sites in an ionic solid, then what are the defects called?
- Frenkel defects
- Schottky defects
- Interstitial defects
- Vacancy defects
- None of these
Which of the following statements is/are false regarding the conductivity in metals?
(a) It is because of movement of free electrons.
(b) It depends upon electrons in the valence shell.
(c) It depends upon the protons inside the nucleus.
- a and c
- a and b
- b and c
- Only c
- a, b and c
Which of the following defects in ionic compounds is caused by the replacement of ions with other ions?
- Schottky defects
- Impurities defects
- Metal excess defects
- Frenkel defects
- None of these
In insulators, the energy gap between occupied energy level and unoccupied energy level (conduction band) is _________.
- larger than semiconductors
- larger than conductors
- larger than semiconductors but less than conductors
- zero
- both 1 and 2
Which of the following statements is/are correct regarding SI unit of conductivity?
(a) SI unit is ohm meter.
(b) It is the reciprocal of unit of resistivity.
(c) It is denoted by a greek letter sigma.
(d) SI unit is Siemens meter.
- a and d
- b and c
- a and b
- b and d
- a, b and d
Which of the following statements is/are correct regarding the conductivity of electrolytes?
(a) It is because of movement of ions.
(b) They show conductivity in molten and aqueous solutions.
(c) Conductivity depends upon the presence of valence electrons.
- Only a and c
- Only c
- Only a
- Only b
- Only a and b
Which of the following is not a crystalline solid?
- Glass
- Crystal of NaCl
- Quartz
- Ice
- Iron
__________ and ________ are n-type of semiconductors.
- Boron, germanium
- Silicon, germanium
- Alluminium, gallium
- Magnesium, lithium
- Cobalt, nickel
Which of the statements is false regarding ferromagnetic substances?
- They are slightly attracted in a magnetic field.
- Their domains are grouped only in parallels.
- They lose their property on heating.
- On heating they become paramagnetic.
- None of these
Find the odd one out.
Polyurethane, Naphthalene, Teflon, Cellophane, and Fiber Glass
- Polyurethane
- Naphthalene
- Teflon
- Cellophane
- Fiber glass
Solids, which are classified as conductor have conductivity in the range of ____________.
- 104 to 107ohm-1m-1
- 10-20 to 10-10 ohm-1 m-1
- 10-6 to 10-4 ohm-1 m-1
- 108 to 1012 ohm-1 m-1
- None of these
Match the following:
| 1. ZnSO4 | a. Molecular solid |
| 2. H2O | b. Metallic solid |
| 3. Sn | c. Ionic solid |
| 4. Graphite | d. Covalent solid |
- 1 - b, 2 - c, 3 - d, 4 - a
- 1 - a, 2 - c, 3 - b, 4 - d
- 1 - c, 2 - a, 3 - b, 4 - d
- 1 - d, 2 - a. 3 - b, 4 - c
- 1 - c, 2 - b, 3 - a, 4 - d