Answer of Q.55
Q.55. Which of these provide compounds necessary to prepare nylon ?
(i) Coal                      (ii) Air                     (iii) Water
(A) Only (i)
(B) Only (i) and (ii)
(C) Only(i) and (iii)
(D) (i), (ii) and (iii)

Dear Student ,
The successful production of a useful fibre by chemical synthesis from compounds readily available from airwater, and coal 
so option (d) is correct 

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Option d
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