question_answer

Substance having ester linkage is:

A)  bakelite              

B)  polythene

C)  PVC                                      

D)  terylene

Correct Answer: D

Solution :

                 Bakelite: It is resin of formaldehyde\[(HCHO)\] and phenol. Polyethene: It is addition polymer of ethylene\[(C{{H}_{2}}=C{{H}_{2}})\]. It has\[C{{H}_{2}}C{{H}_{2}}\]linkages. PVC: It is polymer of vinyl chloride\[(C{{H}_{2}}=CHCl)\]. Terylene: It is condensation polymer of terephthalic acid and ethylene glycol. It has ester linkages. These linkages are formed between acid and alcohol.