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Question
Which among the following is a cross-linked polymer?
Which among the following is a cross-linked polymer?
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Solution
The correct option is B melamine-formaldehyde
Melamine-formaldehyde polymer formed by the condensation polymerisation of melamine and formaldehyde is a cross-linked polymer or the mono-setting polymer which on heating undergo extensive cross linking in moulds and again become infusible. These cannot be reused. Some common examples are bakelite, urea-formaldelyde resins, etc.
It is used in the manufacture of unbreakable crockery.
The correct option is (c).
Melamine-formaldehyde polymer formed by the condensation polymerisation of melamine and formaldehyde is a cross-linked polymer or the mono-setting polymer which on heating undergo extensive cross linking in moulds and again become infusible. These cannot be reused. Some common examples are bakelite, urea-formaldelyde resins, etc.
It is used in the manufacture of unbreakable crockery.
The correct option is (c).
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