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The Solid State

Description: All about solid state
Number of Questions: 15
Created by:
Tags: Solid state Imperfections in Solids Solid State Properties of Solids Types of Solids The Solid State
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Irregularity in the arrangement of constituent particles in solids is called ________.

  1. Stoichiometric defect

  2. Crystal defect

  3. Vacancy defect

  4. Frenkel defect

  5. Impurities defect

Show answer
Correct Option: B
Explanation:

Yes, the irregularity in the arrangement of constituent particles in solids is called crystal defect or imperfection in solids. There are two types of crystal defects; point defects and line defects.

Which of the following ionic solids shows both types of defects; Schottky and Frenkel defects?

  1. AgBr

  2. NaCl

  3. KCl

  4. CsCl

  5. AgI

Show answer
Correct Option: A
Explanation:

Yes, it is correct. AgBr shows both types of defects, i.e. Schottky and Frenkel defects.

Because of the interstitial defects, the number of atoms ___________ the number of lattice sites.

  1. decreases than

  2. becomes larger than

  3. equals to

  4. replaces

  5. none of these

Show answer
Correct Option: B
Explanation:

Yes, it is correct. In interstitial defect, some atoms occupy sites at which generally there is no atom in the crystal structure. Because of the interstitial defects, the number of atoms becomes larger than the number of lattice sites.

When cation and anion both are missing from their regular sites in an ionic solid, then what are the defects called?

  1. Frenkel defects

  2. Schottky defects

  3. Interstitial defects

  4. Vacancy defects

  5. None of these

Show answer
Correct Option: B
Explanation:

Yes, it is correct. When cations and anions both are missing from regular sites, the defect is called Schottky defect. In Schottky defects, the number of missing cations is equal to the number of missing anions in order to maintain the electrical neutrality of the ionic compound.

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.

  1. a and c

  2. a and b

  3. b and c

  4. Only c

  5. a, b and c

Show answer
Correct Option: D
Explanation:

Yes, Only this statement is false. Because It does not depends upon the protons inside the nucleus.

Which of the following defects in ionic compounds is caused by the replacement of ions with other ions?

  1. Schottky defects

  2. Impurities defects

  3. Metal excess defects

  4. Frenkel defects

  5. None of these

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. Defects in ionic compounds because of replacement of ions by the ions of other compound is called impurities defects.

In insulators, the energy gap between occupied energy level and unoccupied energy level (conduction band) is _________.

  1. larger than semiconductors

  2. larger than conductors

  3. larger than semiconductors but less than conductors

  4. zero

  5. both 1 and 2

Show answer
Correct Option: E
Explanation:

Yes, it is correct. Both the options 1 and 2 are correct. The energy gap is largest in insulators. In insulators, the difference in energy between occupied energy level and unoccupied energy level (conduction band) is higher because of which electrons do not flow from occupied energy band to the next higher unoccupied energy band resulting insulators do not conduct electricity as electrons do not flow.

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.

  1. a and d

  2. b and c

  3. a and b

  4. b and d

  5. a, b and d

Show answer
Correct Option: B
Explanation:

Yes, it is correct as both b and c are correct.

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.

  1. Only a and c

  2. Only c

  3. Only a

  4. Only b

  5. Only a and b

Show answer
Correct Option: E
Explanation:

Yes, it is correct. Both the sentences are true regarding the conductivity of electrolytes.

Which of the following is not a crystalline solid?

  1. Glass

  2. Crystal of NaCl

  3. Quartz

  4. Ice

  5. Iron

Show answer
Correct Option: A
Explanation:

Yes, it is correct. Glass is an amorphous soild. Solids having irregular shapes of particles are known as amorphous solids.

__________ and ________ are n-type of semiconductors.

  1. Boron, germanium

  2. Silicon, germanium

  3. Alluminium, gallium

  4. Magnesium, lithium

  5. Cobalt, nickel

Show answer
Correct Option: B
Explanation:

 it is correct. Silicon and/or germanium are doped with electron rich impurities to increase their electrical conductivity. Semiconductors so formed are called n-type semiconductors.

Which of the statements is false regarding ferromagnetic substances?

  1. They are slightly attracted in a magnetic field.

  2. Their domains are grouped only in parallels.

  3. They lose their property on heating.

  4. On heating they become paramagnetic.

  5. None of these

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. This statement is false. Their domains are grouped in parallel and anti-parallel directions but in unequal number.

Find the odd one out.

Polyurethane, Naphthalene, Teflon, Cellophane, and Fiber Glass

  1. Polyurethane

  2. Naphthalene

  3. Teflon

  4. Cellophane

  5. Fiber glass

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer.

All are amorphous except 'Naphthalene', which is crystalline.

Solids, which are classified as conductor have conductivity in the range of ____________.

  1. 104 to 107ohm-1m-1

  2. 10-20 to 10-10 ohm-1 m-1

  3. 10-6 to 10-4 ohm-1 m-1

  4. 108 to 1012 ohm-1 m-1

  5. None of these

Show answer
Correct Option: A
Explanation:

Solids having magnitude of range of conductivities from 104 to 107 ohm-1m-1 are classified as conductors.

Match the following:

1. ZnSO4 a. Molecular solid
2. H2O b. Metallic solid
3. Sn c. Ionic solid
4. Graphite d. Covalent solid

  1. 1 - b, 2 - c, 3 - d, 4 - a

  2. 1 - a, 2 - c, 3 - b, 4 - d

  3. 1 - c, 2 - a, 3 - b, 4 - d

  4. 1 - d, 2 - a. 3 - b, 4 - c

  5. 1 - c, 2 - b, 3 - a, 4 - d

Show answer
Correct Option: C
Explanation:

Yes, it is the correct. Based on the nature of the intermolecular forces operating in them, ZnSO4 is an ionic solid, H2O is a molecular solid, Sn is  metallic and Graphite is a covalent solid.

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