Following are the properties of four materials P,Q,R, and S. Identify them and select the correct option regarding them.

P: It is a plastic which cannot be deformed and reshaped on heating.
Q: It is used in making sportswear due to its low moisture absorption property.
R: It is a thermoplastic with high resistance to wrinkles and used for making shawls.
S: It is important for making firemen uniform.

The material Q can be used for wiping the wet floor.

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The material S is thermoplastic which consists of linear monomer units.

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The material R closely resembles to silk.

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The material P is a thermosetting plastic which consists of cross linked monomer units.

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Solution

The correct option is D The material P is a thermosetting plastic which consists of cross linked monomer units.
Thermosetting plastics have a crosslinked arrangement of monomer units. On heating, thermosetting plastics cannot be easily deformed.
Polyester is used in making sportswear due to its low moisture absorption property.
Melamine is used in making firemen uniform.
Thermoplastics have linear arrangement of monomer units. On heating, thermoplastics gets easily deformed and can be reshaped.

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Similar questions

Identify the materials W, X and Z as per the characteristics given below:

W: Biodegradable material that burns completely leaving no residue

X: Synthetic fibre that is wrinkle resistant and used to make sportswear

Y: Thermosetting plastic used for making handles of cookware

Z: Thermoplastic used for making carry bags and adhesive tapes

On the basis of the following features, identify the correct material.
I. It is a natural polymer with elastic properties.
II. It is a polymer formed by the combination of monomer molecules, isoprene.
III. It is widely used for making goods like raincoats, gumboots, footwear, etc.

Q. Read the following statements carefully and select the option which correctly identifies the true (T) and false (F) statements.

P: Materials that have a shiny appearance are said to have 'lustre’.
Q: Coins are made up of silver, copper and gold are non-lustrous.
R: Wood is used in making decorative pieces due to its lustrous property.

Q. Give scientific reasons for the following:
(a) Plastic containers used for microwave cooking can be made of thermosetting plastic.
(b) Thermoplastics are not used for making saucepan handles.
(c) Bakelite is used to make plugs and sockets.

Which property of linen makes it useful as a fabric for making napkins and handkerchiefs ?

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