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Question 1:

Which of the following properties is a characteristic of polymers?

A) High electrical conductivity
B) Low melting point
C) High strength-to-weight ratio
D) Low chemical resistance

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Explanation: The correct answer is C) High strength-to-weight ratio. Polymers exhibit a high strength-to-weight ratio, which means they can provide significant strength and durability while being lightweight. This property makes them suitable for various applications such as aerospace, automotive, and sports equipment.

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Question 2:

Which of the following polymers is commonly used in electrical insulation?

A) Polyethylene
B) Polypropylene
C) Polyvinyl chloride (PVC)
D) Polystyrene

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Explanation: The correct answer is C) Polyvinyl chloride (PVC). PVC is commonly used in electrical insulation due to its excellent electrical insulating properties. It is resistant to moisture, chemicals, and high voltage, making it suitable for applications in wiring, cables, and electrical components.

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Question 3:

Which type of polymer is used to make transparent bottles and food containers?

A) Polyethylene
B) Polypropylene
C) Polycarbonate
D) Polyethylene terephthalate (PET)

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Explanation: The correct answer is D) Polyethylene terephthalate (PET). PET is commonly used to make transparent bottles and food containers. It has excellent clarity, good barrier properties, and is resistant to impact and moisture, making it suitable for packaging applications.

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Question 4:

Which type of polymer is used to make synthetic fibers such as polyester and nylon?

A) Polyethylene
B) Polypropylene
C) Polycarbonate
D) Polyamide

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Explanation: The correct answer is D) Polyamide. Polyamide polymers, commonly known as nylon, are used to make synthetic fibers. Nylon fibers are strong, elastic, and resistant to abrasion, making them suitable for various textile applications, including clothing, carpets, and industrial fabrics.

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Question 5:

Which type of polymer is commonly used in dental fillings and protective coatings?

A) Polyethylene
B) Polypropylene
C) Polyurethane
D) Polymethyl methacrylate (PMMA)

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Explanation: The correct answer is D) Polymethyl methacrylate (PMMA). PMMA is commonly used in dental fillings and protective coatings due to its biocompatibility, transparency, and good mechanical properties. It is also known by the trade name "acrylic" and is used in various applications, including optical lenses and signage.