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Silicones

Silly putty :

Question

Silly putty :

A

is a silicone polymer.

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B

has a composition intermediate between silicone oils and silicon rubbers.

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C

is an asbestos.

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D

is not related to any chemical.

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Solution

The correct options are
A is a silicone polymer.
C has a composition intermediate between silicone oils and silicon rubbers.
Silly Putty is a toy based on silicone polymers which display unusual physical properties. It bounces, but breaks when given a sharp blow and can also flow like a liquid.

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Similar questions

Q. Silicones are synthetic polymers containing repeated

R_{2} S i O

units. Since the empirical formula is that of a ketone

(R_{2} C O),

the name silicone has been given to these materials. Silicones can be made into oils, rubbery elastomers and resins. They find a variety of appilications because of their chemical inertness, water repelling nature, heat resistance and good electrical insulating property.

The name 'silica' covers an entiregroup of minerals which have general formula

S i O_{2}

, the most common of which is quartz.
Quartz is a framework silicate with

S i O_{4}

tetrahedra arranged in spirals.

List-I contains questions related to silicates given above and List-II contains their answers.

Which of the following options has the correct combination considering Lists-I and List-II?

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(b) Silicon carbide can be used as a lubricant.
(c) Silicon dioxide is the raw material for the manufacture of cement as well as glass.
(d) Hardness of

S i O_{2}

S i C

is due to their regular tetrahedral structure.

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