An example of amorphous material is

In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?

A

Tin

B

Lead

C

Zinc

D

Glass

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the

A

Low impact strength

B

High flexibility

C

Better finish and surface appearance

D

High plastic deformation

Amorphous material is one

A

In which atoms align themselves in a geometric pattern upon solidification

B

In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid

C

Which is not attacked by phosphorous

D

Which emits fumes on melting

Which of the following is an amorphous material?

A

Mica

B

Silver

C

Lead

D

Glass

Which is an amorphous material?

A

Glass

B

Mica

C

Brass

D

Cast iron

Nimbus clouds generally have ----and are amorphous in appearance.

A

an uniform dark color

B

a uniformly dark color

C

uniformly the dark color

D

uniform dark color

With increase in temperature, the thermal conductivity of non-metallic amorphous solids

A

Decreases

B

Increases

C

Remains constant

D

First decreases upto certain temperature and then increases

Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.

A

Nylon

B

Polyacrylonitrile

C

Polypropylene

D

Polyester

Thermal conductivity of non-metallic amorphous solids with decrease in temperature

A

Increases

B

Decreases

C

Remain constant

D

May increase or decrease depending on temperature

An orthotropic material is a special class of anisotropic material, which is described by their properties in three perpendicular directions. An example of orthotropic material is

A

Stainless steel

B

Cast iron

C

Wood

D

Teflon

An example of amorphous material is

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