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Which of the following is not a property of thermoplastics?

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Which of the following is not a property of thermoplastics?

(a) Recyclable

(b) Soft and weak

(c) Easy to mold

(d) Can be used at high temperatures

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My query is from Thermoplastics in division Non Metallic Materials of Engineering Material & Metallurgy

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Correct answer is (d) Can be used at high temperatures

For explanation: Thermoplastics tend to become soft when heated due to weak secondary forces and become hard on cooling. This makes it easier to mold them into any required shape any number of times, and therefore makes them recyclable. They are, however, not suitable for use under high temperatures.

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