Q1.
Which of the following is the first fully synthetic fibre?
(A) Rayon
(B) Nylon
(C) Polyester
(D) Acrylic
Q2.
Rayon is also known as:
(A) Artificial wool
(B) Artificial silk
(C) Artificial cotton
(D) Artificial jute
Q3.
Which synthetic fibre is known as artificial wool?
(A) Nylon
(B) Polyester
(C) Acrylic
(D) Rayon
Q4.
The repeating units in synthetic fibres are called:
(A) Monomers
(B) Polymers
(C) Molecules
(D) Atoms
Q5.
Which plastic is used for making non-stick coating on cookware?
(A) PVC
(B) Polythene
(C) Teflon
(D) Bakelite
Q6.
Thermoplastics can be:
(A) Heated and reshaped many times
(B) Heated only once
(C) Never heated
(D) Only melted but not reshaped
Q7.
Which of the following is a thermosetting plastic?
(A) Polythene
(B) PVC
(C) Bakelite
(D) Polystyrene
Q8.
PET is used for making:
(A) Bottles and jars
(B) Electrical switches
(C) Car tyres
(D) Non-stick pans
Q9.
Which property makes nylon suitable for making parachutes and ropes?
(A) Light weight
(B) High strength
(C) Water resistance
(D) All of the above
Q10.
Synthetic fibres are:
(A) More expensive than natural fibres
(B) Less durable than natural fibres
(C) Quick drying
(D) Good absorbers of water
Q11.
Which plastic is biodegradable?
(A) Polythene
(B) PVC
(C) None of these
(D) Teflon
Q12.
The main raw material for manufacturing synthetic fibres is:
(A) Cotton
(B) Petrochemicals
(C) Wood
(D) Animals
Q13.
Which fibre is made from wood pulp?
(A) Nylon
(B) Polyester
(C) Rayon
(D) Acrylic
Q14.
Melamine is used for making:
(A) Floor tiles
(B) Unbreakable dinnerware
(C) Kitchenware
(D) All of the above
Q15.
Which of the following is NOT a characteristic of synthetic fibres?
(A) Wrinkle resistant
(B) Easy to wash
(C) High water absorption
(D) Durable
Q16.
The full form of PVC is:
(A) Polyvinyl Chloride
(B) Polyethylene Chloride
(C) Polypropylene Chloride
(D) Polyvinyl Carbonate
Q17.
Cotton is preferred over synthetic fibres for clothing in summer because:
(A) It is cheaper
(B) It absorbs sweat better
(C) It is more durable
(D) It is wrinkle resistant
Q18.
Which synthetic fibre catches fire easily?
(A) Polyester
(B) Nylon
(C) Acrylic
(D) All of the above
Q19.
The 4R principle for plastic waste management includes:
(A) Reduce, Reuse, Recycle, Recover
(B) Reduce, Reuse, Recycle, Remove
(C) Reduce, Reuse, Recover, Replace
(D) Reuse, Recycle, Remove, Replace
Q20.
Polyester is often mixed with cotton to make fabric that is:
(A) Wrinkle resistant
(B) Easy to wash
(C) Quick drying
(D) All of the above
Q21.
Which material is used in making bulletproof vests?
(A) Cotton
(B) Polyester
(C) Kevlar
(D) Rayon
Q22.
The process of making fibres into yarn is called:
(A) Spinning
(B) Weaving
(C) Knitting
(D) Ginning
Q23.
Disposal of plastic waste is a problem because:
(A) It is non-biodegradable
(B) It releases toxic gases when burnt
(C) It clogs drainage systems
(D) All of the above
Q24.
Which plastic is used for making toys?
(A) Polystyrene
(B) Melamine
(C) Bakelite
(D) Teflon
Q25.
The advantage of synthetic fibres over natural fibres is that they are:
(A) More comfortable to wear
(B) Better air circulation
(C) More resistant to insects and microbes
(D) Better sweat absorption
Q1.
Nylon was the first fully synthetic fibre invented in 1935. Made entirely from petrochemicals without any natural raw material. Used for parachutes, ropes, and clothing.
Q2.
Rayon is called artificial silk because it has similar appearance and feel to natural silk. Made from wood pulp through chemical treatment. Semi-synthetic fibre.
Q3.
Acrylic fibres resemble wool in texture and warmth. Used for making sweaters, blankets, and winter clothing. Light weight and wrinkle resistant.
Q4.
Polymers are large molecules made of many repeating units called monomers. Synthetic fibres are polymers formed by joining small molecules (monomers) together.
Q5.
Teflon has non-stick properties and is used for coating cookware. It doesn't react with food and prevents sticking. Chemically inert and heat resistant.
Q6.
Thermoplastics can be heated and reshaped multiple times without losing properties. Examples: polythene, PVC, polystyrene. Useful for recycling.
Q7.
Bakelite is thermosetting plastic that becomes hard and cannot be reshaped once set. Used for electrical switches, handles of utensils. Heat resistant.
Q8.
PET (Polyethylene Terephthalate) is used for making bottles, jars, and containers. Clear, lightweight, and recyclable. Common in soft drink bottles.
Q9.
Nylon has all three properties: lightweight, high tensile strength, and water resistance. These combined properties make it ideal for parachutes and climbing ropes.
Q10.
Synthetic fibres dry quickly due to low water absorption. They are wrinkle resistant, easy to maintain, and durable compared to natural fibres.
Q11.
Most conventional plastics (polythene, PVC, teflon) are non-biodegradable. They persist in environment for hundreds of years causing pollution. Some bio-plastics are being developed.
Q12.
Petrochemicals derived from petroleum and natural gas are main raw materials for synthetic fibres. These provide the chemical building blocks (monomers) for polymerization.
Q13.
Rayon is made from wood pulp (cellulose) through chemical processing. It's semi-synthetic - natural raw material but synthetic process. Resembles natural silk.
Q14.
Melamine is versatile thermosetting plastic used for floor tiles, unbreakable dinnerware, and kitchenware. Fire resistant and doesn't break easily.
Q15.
Synthetic fibres have low water absorption, unlike natural fibres. They are wrinkle resistant, easy to wash, durable, but don't absorb sweat well.
Q16.
PVC stands for Polyvinyl Chloride. Used for pipes, flooring, wire insulation, and packaging materials. Durable and chemical resistant thermoplastic.
Q17.
Cotton absorbs sweat better than synthetic fibres, keeping body cool and comfortable in summer. Natural fibres allow better air circulation and moisture absorption.
Q18.
All synthetic fibres (polyester, nylon, acrylic) catch fire easily and melt, causing severe burns. Natural fibres are safer as they burn without melting.
Q19.
4R principle: Reduce (use less plastic), Reuse (use again), Recycle (make new products), Recover (energy from waste). Sustainable waste management approach.
Q20.
Polyester-cotton blend combines advantages: wrinkle resistance and durability from polyester, comfort and absorption from cotton. Easy to wash and quick drying.
Q21.
Kevlar is ultra-strong synthetic fibre used in bulletproof vests. Five times stronger than steel by weight. Also used in protective gear and aerospace.
Q22.
Spinning is the process of converting fibres into continuous yarn or thread. Done by twisting fibres together using spinning wheel or machines.
Q23.
Plastic waste problems: non-biodegradable (persists for centuries), releases toxic gases when burnt, clogs drains causing floods, harms marine life and environment.
Q24.
Polystyrene is lightweight, colorful, and safe thermoplastic used for making toys. Easy to mold into different shapes and relatively inexpensive.
Q25.
Synthetic fibres resist insects, moths, and microbes better than natural fibres. They don't rot or decay easily, making them more durable and longer-lasting.