Polymers Practice Questions
Thanaweya Amma (Egypt) · Thanaweya Chemistry · 147 free MCQs with instant results and detailed explanations.
147
Total
44
Easy
75
Medium
28
Hard
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Sample Questions from Polymers
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary type of bond that holds the monomers together in a polymer chain?
A.
Ionic bond
B.
Covalent bond
C.
Metallic bond
D.
Hydrogen bond
Show Answer & Explanation
Correct Answer: B
Covalent bonds are the primary bonds that link monomers in a polymer chain, providing strong connections necessary for stability.
Q2
Easy
Which of the following is NOT a characteristic of polymers?
A.
High molecular weight
B.
Crystalline structure
C.
High melting point
D.
Flexible structure
Show Answer & Explanation
Correct Answer: C
While some polymers can have high melting points, many have relatively low melting points and are flexible, unlike typical crystalline materials.
Q3
Easy
Which polymer is commonly used in the production of plastic bottles?
A.
Polystyrene
B.
Polyethylene terephthalate (PET)
C.
Polyvinyl chloride (PVC)
D.
Polypropylene
Show Answer & Explanation
Correct Answer: B
Polyethylene terephthalate (PET) is widely used for making plastic bottles due to its strength, lightweight, and resistance to impact.
Q4
Medium
Which of the following polymers is formed through addition polymerization?
A.
Polyethylene
B.
Polyvinyl acetate
C.
Polystyrene
D.
All of the above
Show Answer & Explanation
Correct Answer: D
Addition polymerization involves the joining of unsaturated monomers without the loss of any small molecule. Polyethylene, polyvinyl acetate, and polystyrene are all formed via this process, thus the correct answer is 'All of the above'.
Q5
Medium
What is the main characteristic of thermoplastic polymers?
A.
They can be reshaped upon heating.
B.
They undergo cross-linking.
C.
They are biodegradable.
D.
They have a fixed shape and cannot be remolded.
Show Answer & Explanation
Correct Answer: A
Thermoplastic polymers can be heated and reshaped multiple times without undergoing any chemical change, distinguishing them from thermosetting polymers which cannot be reshaped after curing.
Q6
Medium
Determine the molecular weight of a polymer if the degree of polymerization is 200 and the molecular weight of the monomer is 100 g/mol.
A.
20000 g/mol
B.
10000 g/mol
C.
200 g/mol
D.
100 g/mol
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Correct Answer: A
The molecular weight of the polymer can be calculated using the formula: Molecular Weight = Degree of Polymerization x Molecular Weight of Monomer. Thus, 200 x 100 g/mol = 20000 g/mol.
Q7
Medium
Which property of polymers is primarily affected by the degree of crystallinity?
A.
Thermal stability
B.
Electrical conductivity
C.
Ductility
D.
Color
Show Answer & Explanation
Correct Answer: A
The degree of crystallinity in polymers impacts their thermal stability; higher crystallinity typically results in better thermal stability due to improved molecular packing.
Q8
Hard
Which of the following polymers is formed through the process of addition polymerization?
A.
Polystyrene
B.
Polyethylene terephthalate
C.
Nylon 6,6
D.
Polyvinyl acetate
Show Answer & Explanation
Correct Answer: A
Polystyrene is formed through addition polymerization, where monomers like styrene link together without the loss of any small molecule. In contrast, Nylon 6,6 is formed through condensation polymerization.
Q9
Hard
Which of the following types of polymerization involves repeated condensation reactions to form polymers?
A.
Addition polymerization
B.
Condensation polymerization
C.
Chain growth polymerization
D.
Step growth polymerization
Show Answer & Explanation
Correct Answer: B
Condensation polymerization occurs when monomers with two or more functional groups react, releasing small molecules like water as byproducts. This differentiates it from addition polymerization, where no byproducts are formed.
Q10
Hard
If a linear polymer has a degree of polymerization of 250, and each monomer contributes 50 g/mol to the total molecular weight, what would be the approximate molecular weight of the polymer?
A.
12500 g/mol
B.
1250 g/mol
C.
2500 g/mol
D.
5000 g/mol
Show Answer & Explanation
Correct Answer: A
The molecular weight of the polymer is calculated by multiplying the degree of polymerization (250) by the molecular weight of each monomer (50 g/mol), resulting in 250 * 50 = 12500 g/mol.
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Polymers — Thanaweya Amma (Egypt) Thanaweya Chemistry Practice Questions Online
This page contains 147 practice MCQs for the chapter Polymers in Thanaweya Amma (Egypt) Thanaweya Chemistry. The questions are organized by difficulty — 44 easy, 75 medium, 28 hard — so you can choose the right level for your preparation.
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