Question # 1

Every crystalline solid has

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definite melting point

different melting points

may or may not be definite

none of them

Lead, copper and wrought iron are examples of

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brittle substances

ductile substances

plastic substances

elastic substances

The units of modulus of elasticity are

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Nm^-2

Nm

ms^-1

Pascal

Examples of crystalline solids are:

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Cooper

NaCl

Zirconia

Both (A) and (B)

All of these

Polymers are the chemical combination of carbon with:

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Nitrogen

Oxygen

Hydrogen

All of these

None of these

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

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plastic line

breaking point

proportional limit

none of them

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

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

The charged nucleus of an atom itself spins its magnetic field

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equal to the field produced by orbital electrons

greater than the field produced by orbital electrons

much weaker than the field produced by orbital electrons

none of these

The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

Zirconia is classified as:

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Ceramic solid

Ionic compound

Metal

Either (A) or (B)

Either (B) or (C)

In metallic crystals which of the following thing remains constant

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amplitude of oscillations

temperature of solid

average atomic positions

all of them

The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

The domains are of macroscopic size of the order of

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centimeters

meters

millimeters

nanomneters

The electrons in the outermost shell of an atom are called

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core electrons

valence electrons

high energy electrons

none of them

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ECAT Physics Chapter 17 Physics of Solids Online Test MCQs With Answers

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