A) Urea formaldehyde resin
B) Phenol formaldehyde resin
C) Alkyl resin
D) Melamine formaldehyde resin
Correct Answer: A
Solution :
\[N{{H}_{2}}-\overset{\begin{smallmatrix} O \\ \,|| \end{smallmatrix}}{\mathop{C}}\,-N{{H}_{2}}+HCHO\to \,polymer\]
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