question_answer

  (a) Arrange the following polymers in the increasing order of tensile strength : .                                                                                                                                               1 (b) (i) Give one example of a synthetic rubber and mention its main advantage.                                                1 (ii) Write the structure of monomers of Dacron.                                                                                                                1

Answer:

                (a)                                                                                                                              1 (b) (i)  Buna-N is synthetic rubber. It is resistant to the action of petrol, lubricating oil and organic solvents.     1                                                                 (ii)                                                         1