science
Grade-5
Easy
Question
Which of the following is the advantage of plastics?
- Many of them are durable.
- They are cheaper than metals.
- Both A and B
- Both A and B.
Hint:
Plastics are a better alternative for many applications to metals due to its properties.
The correct answer is: Both A and B
- Plastics are durable due to the strong carbon bonds.
- They also take very less energy to make that is why they are very cheap unlike metals.
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(i). Figure (a) shows the structure of a monomer, while figure (b) shows the structure of a polymer.
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(i). Figure (a) shows the structure of a monomer, while figure (b) shows the structure of a polymer.
(ii). Figure (a) shows the structure of a linear polymer, while (b) shows the structure of a cross-linked polymer.
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Polyvinyl chloride is soft, ______, and lightweight plastic.
Polyvinyl chloride is soft, ______, and lightweight plastic.
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All plastics have ______ type of arrangement of units.
All plastics have ______ type of arrangement of units.
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Identify the P, Q, and R from the following:
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Identify the P, Q, and R from the following:
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Which of the following is/are not a property of plastics?
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III. Plastics are insoluble in water.
IV. Plastics are a poor conductor of heat
Which of the following is/are not a property of plastics?
I. Plastics are non-combustible.
II. Plastics do not react with air and acids.
III. Plastics are insoluble in water.
IV. Plastics are a poor conductor of heat
I. Plastics are non-combustible.
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III. Plastics are insoluble in water.
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Statement 2: Polyethylene is a natural fiber
Read the given statements and mark the appropriate answer.
Statement 1: Polyethylene is synthesized from polymers by linking a large number of ethene units.
Statement 2: Polyethylene is a natural fiber
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Statement 2: Polyethylene is a natural fiber
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The polyvinyl chloride plastics are generally _______ in water.
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