A) adipic acid and hexamethylene diamine
B) phenol and formaldehyde
C) terephthalic acid and ethylene glycol
D) sebacic acid and hexamethylene
Correct Answer: A
Solution :
Nylon-66 is obtained by condensation copolymerisation of adipic acid and hexamethylene, diamine. \[\underset{\text{Hexamethylenen}\,\,\text{diamine}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{Adipic}\,\text{acid}}{\mathop{n{{H}_{2}}N-{{(C{{H}_{2}})}_{3}}-N{{H}_{2}}+nHO-\overset{O}{\mathop{\overset{\mathbf{|}\,\,\mathbf{|}}{\mathop{C}}\,}}\,-{{(C{{H}_{2}})}_{4}}-\overset{O}{\mathop{\overset{\mathbf{|}\,\,\mathbf{|}}{\mathop{C}}\,}}\,-OH}}\,\]\[\xrightarrow[-{{H}_{2}}O]{\Delta }\underset{{}}{\mathop{-\left[ \underset{Nylon-66}{\mathop{NH{{(C{{H}_{2}})}_{6}}NHCO{{(C{{H}_{2}})}_{4}}CO}}\, \right]-}}\,\]
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