Most Important Solids Quiz Test Online

Solids Quiz Test Online

Solids Test. 1

1 / 20

1) Ionic solids are characterized by:

Good conductivity in solid state

Low melting point

Solubility in polar solvent

High vapor pressure

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2) Transition temperature is shown by which of the following pairs:

All of these

Isomorph and polymorph

Isomorph and allotrope

Allotrope and polymorph

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3) Which ionic solid has highest lattice energy

CsCl

NaCl

KCl

LiCl

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4) Which one has the highest melting point and boiling point

Ionic crystal

Metallic crystal

Covalent crystal

Molecular crystal

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5) Cubic crystal system has the following unit cell dimensions (!= represents not equal )

a=b!=c and 𝛼=𝛽=90∘, 𝛾=120∘

a=b!=c and 𝛼=𝛽=𝛾=90∘

a!=b!=c and 𝛼=𝛽=𝛾=90∘

a=b=c and 𝛼=𝛽=𝛾=90∘

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6) A solid may be made up of

Atoms

all of these

Ions

Molecues

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7) Total unit cell dimensions are

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8) When an element exist in more than one crystalline forms, it is known as

Isomorphism

Anisotropy

Allotropy

Polymorphism

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9) In crystal structure of NaCl, the arrangement of Cl- ions is

Simple Cubic

Hexagonal

Face centered cubic

Body centered cubic

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10) Which of the following is isotropic property

Cleavage

Refractive index

Coefficient of thermal expansion

Metallic conduction

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11) In a crystal lattice the correct sequence of bond angles is

All are possible

bc=α, ca=β, ab=γ

bc=β, ca=α, ab=γ

bc=γ, ca=β, ab=α

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12) In a crystal, the atoms are located at the position of

Zero P.E.

Minimum P.E.

Infinite P.E.

Maximum P.E.

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13) Lattice energy decreases with the increase in size of ion because oppositely charged ions

Have strong electrostatic forces

Have low empty spaces

Have close packing

Becomes less tight

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14) Which of the following is not amorphous solid

Rubber

Glass

Glue

Table salt

15 / 20

15) Which solids are called true solids?

Amorphous

Crystalline

Metallic

Vitreous

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16) Crystalline parts of otherwise amorphous solids are known as

Allotrope

Crystallites

Isomorph

Polymorph

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17) Coinage metals are Cu, Ag and Au and they have _______ crystal system.

Hexgonal

Cubic

Trigon

Tetragonal

18 / 20

18) Which of the following is anisotropic

Quartz

Water

Rubber

Hydrogen

19 / 20

19) Which of the following intermolecular forces are present in solid iodine

Debye forces

London dispersion forces

Hydrogen bonding

Dipole - Dipole forces

20 / 20

20) Transition temperature of Sulphur is

32.02

95.5 C

128 C

13.2 C

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Solids Test. 2

1 / 18

1) Which of the following substances has a sharp melting point? (ETEA 2019)

Glass

Gemstone

Coal tar

Diamond

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2) Which of the following is an example of polar molecular solid

Dry ice

Naphthalene

Iodine

Sugar

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3) The number of Cl⁻ ions per unit cell of a simple cubic lattice at the corners is:

4 / 18

4) In the structure of NaCl, each sodium ion is surrounded by how many chloride ions?

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5) Dry ice (solid CO₂) is an example of:

Molecular crystal

Ionic crystal

Covalent crystal

Metallic crystal

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6) Which of the following has the highest lattice energy?

KBr

NaCl

KCl

LiCl

7 / 18

7) The crystals formed due to London dispersion forces are:

Metallic

Molecular

Covalent

Ionic

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8) The coordination number of Na⁺ in NaCl crystal is:

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9) Independent molecule of NaCl may exist in

Liquid phase

Vapour phase

Solid phase

All of the above

10 / 18

10) Graphite is one of the allotropic forms of carbon. It is:

A good conductor of electricity

Isotropic

Anisotropic

Both Anisotropic and A good conductor of electricity

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11) The crystalline form of white tin is:

Hexagonal

All of these

Tetragonal

Cubic

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12) The best conductors of electricity are:

Covalent solids

Metallic solids

Molecular solids

Ionic solids

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13) Lattice energy is also called:

Bond energy

Crystal energy

Potential energy

Energy of affinity

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14) In diamond, each of the four outer electrons on every carbon atom is involved in covalent bonding. This means that there are no free electrons available. Which property does this explain? (SET 2019)

Diamond has a high refractive index

Diamond does not conduct heat and electricity

Diamond is very hard

Diamond cuts diamond

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15) Molecular crystals are generally:

Very hard

Hard

Always polar

Soft

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16)

The electrical conductivity of graphite is greater in one direction than in another due to: (MDCAT 2016)

Symmetry

Cleavage plane

Isomorphism

Anisotropy

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17) Which of the following is incorrect about the structure of iodine (I₂)?

I-I(g)>I-I(s)

Face-centered cubic

I-I(g)<I-I(s) bond length

Metallic appearance

18 / 18

18) The coordination number of each ion in NaCl is:

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Most Important Solids Quiz Test Online

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