The perentageofC, H, Nin a disubtitutedaromaticcompound (A) is 71.11 , 6.67 and 10.37 respectively . Its moleculecontainsa singleatom of nitrogen . Compound(A) gives NH_(3)whenheatedwith NaOH to from a salt (B) form whichan acid (C) is obtained on acidifcations. Twoisomersare generatedwhen (C) undergoeselectrophilicaromatic substitution. (C) on treatementwithPCl_(5)generates (D) whichon reactionwith (B)generates(E) . Identify(A) to (E).

The perentageofC, H, Nin a disubtitutedaromaticcompound (A) is 71.11 ,

1.	The perentageofC, H, Nin a disubtitutedaromaticcompound (A) is 71.11 , 6.67 and 10.37 respectively . Its moleculecontainsa singleatom of nitrogen . Compound(A) gives NH_(3)whenheatedwith NaOH to from a salt (B) form whichan acid (C) is obtained on acidifcations. Twoisomersare generatedwhen (C) undergoeselectrophilicaromatic substitution. (C) on treatementwithPCl_(5)generates (D) whichon reactionwith (B)generates(E) . Identify(A) to (E).
Answer» Solution :Firstly, we shouldcalculatedth empirical FORMULA of the compound. `{:("Element","Perecentage","At wt",5"by atom", "Simplest ratio"),(C,71.11,12,5.926,8),(H,6.67,1,6.67,9),(N,10.37,14,0.74,1),(O,11.85,16,0.74,1):}` Empirical formula of (A)is `C_(6)H_(0)NO` whichis similar molecular FORMUAL as THEMOLECULE containsonly oneN. Since(A) givesoff `NH_(3)`with `NaOH`is it clear thatit has` - CONH_(2)`group. So, thepossiblestrcuctureare . Since (C) givesonly twoisomericProductson electrophilicaromatic substitution (C)is .