WorksheetsWT 7 Chemistry (VIII)
Total questions: 15
Worksheet time: 8mins
The fibres that are made by human beings are called ...
Man-made or synthetic fibres
Natural fibres
Artificial fibres
Plastic
Plastics that can be moulded once and cannot be softened by heating are
thermoplastics
thermosetting plastic
thermopet plastics
thermoplant plastics
Which of the following resists fire?
PVC
Polythene
Bakelite
Melamine
Non-stick coating on cookware is
Teflon
Bakelite
Melamine
PVC
Uniforms of firemen have coating of ______ to make them flame resistant.
melamine
teflon
bakelite
none of these
Full form of PVC is
Polyvinyl chlorine
Polyvariety of chlorine
Polyvinyl chloride
Polyethene chloride
Choose the odd one.
Nylon
Cotton
Acrylic
Polyester
Example of polythene is
ropes
parachutes
plastics
none of these
Which fibre is also known as regenerated fibre?
Acrylic
Nylon
Teflon
Rayon
Cellulose is a polymer of
fructose
glucose
sucrose
glucose and fructose
Bakelite is used for making electrical appliances because
it is heat resistant
it is poor conductor of electricity
it is good conductor of electricity
it is good conductor of heat
Arrangement of monomers in plastics is
linear
cross-linked
linear and cross-linked
none of these
Choose the correct statement about bakelite.
Bakelite is a good conductor of heat.
Bakelite is used for making handles of utensils.
Bakelite ia thermoplastic.
It is used for manufacturing toys.
Synthetic fibres are synthesized from raw materials called
wood pulp
plastics
plants
petrochemicals
Plastics react with
air
water
chemicals
none of these
