______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?

Related Mcqs:

In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ?

A. Bakelite (phenol formaldehyde) B. Polyester C. Polythene D. Nylon-6...

Maximum consumption of polymers is in___________________?

A. Electrical insulation B. Toys making C. Coating and films D. Packaging...

Which of the following is not present in bagasse fiber?

A. Cellulose B. Lignin C. Pentogens D. None of these...

Synthetic rubber___________________?

A. Deforms, if stretched to double of its original dimension B. Is brittle at low temperature C. Is softer at higher temperature D. Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases...

Gutta percha rubber is_________________?

A. Soft & tacky at room temperature B. An isomer of natural rubber C. A thermosetting resin D. Recovered by coagulation of rubber latex...