Question # 1

Substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

Polymers are the chemical combination of carbon with:

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Nitrogen

Oxygen

Hydrogen

All of these

None of these

The word amorphous means:

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Without any structure

With definite structure

Regular arrangement of molecules

Both (B) and (C)

None of these

When a large number of atoms are brought close to one another to form a solid, each energy level of an isolated atom splits into sub-levels, called

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energy bands

energy shells

states

all of them

Which of the following can become a good temporarily magnet

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iron

steel

both of them

none of them

The crystalline structure of NaCI is

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rectangular

hexagonal

tetrahedral

cubical

The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structure are

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5

7

9

14

The solids are classified as:

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Metals

Crystalline

Amorphous

Polymeric

All except (A)

Every crystalline solid has

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definite melting point

different melting points

may or may not be definite

none of them

The pattern of crystalline solid is:

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One dimesional

Two dimensional

Three dimensional

Either (A) or (B)

None of these

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

completely filled and play active part in conduction process

not completely filled and play no part in conduction process

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

The first super conductor was discovered in

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1811

1890

1901

1911

The force which maintain the strict long-range order between atoms of a crystalline solid is the:

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Nuclear force

Cohesive force

Adhesive force

Coulomb force

None of these

The size of the domain is such that they can contain

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10²to 10⁴atoms

10⁴ to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

A structure of polymeric solid is:

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An ordered structure

A disordered structure

Intermediate between order and disorder

Any of these

None of these

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Physics ECAT Pre Engineering Chapter 17 Physics of Solid Online Test MCQs With Answers

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