1.

{:(,"List - I", "List- II"),(,"(P)" HCHO + NH_(3) , (1) "Polymer"),(,"(Q)" "Urea + Formaldehyde" , (2) "Hypnotic"),(,"(R)" "Urea + Malonicester" , (3) "Insectiside"),(,"(S)" CHCl_(3) + conc. HNO_(3) , (4) "Urinaryantiseptic"):}

Answer»

<P>`{:(,"P","Q","R","S"),((A),2,3,4,1):}`
`{:(,"P","Q","R","S"),((B),1,4,2,3):}`
`{:(,"P","Q","R","S"),((C),4,1,3,2):}`
`{:(,"P","Q","R","S"),((D),4,1,2,3):}`

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