One characteristic of thermosets is that ___________.
(a) they become soft on cooling
(b) they become hard after heating
(c) they can be repeatedly remoulded into desired shapes
(d) they become soft again and again on reheating

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Solution

(b) they become hard after heating

Thermosetting plastics become soft only the first time; when they are reheated, they become hard (take firm shape).

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One characteristic of thermosets is that ___________. (a) they become soft on cooling (b) they become hard after heating (c) they can be repeatedly remoulded into desired shapes (d) they become soft again and again on reheating

(b) they become hard after heating Thermosetting plastics become soft only the first time; when they are reheated, they become hard (take firm shape).

One characteristic of thermosets is that ___________.
(a) they become soft on cooling
(b) they become hard after heating
(c) they can be repeatedly remoulded into desired shapes
(d) they become soft again and again on reheating

(b) they become hard after heating

Thermosetting plastics become soft only the first time; when they are reheated, they become hard (take firm shape).