RCOOH ANS - Carboxylic acids Acid/ALA/P.1 90(I)1.(c) SOCl 2...

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Unformatted text preview: Carboxylic acids Acid/ALA/P.1 90(I)1.(c) SOCl 2 Cl C (CH 2 ) 4 O C Cl O N H 2 (CH 2 ) 6 NH 2 N H (CH 2 ) 6 N H C (CH 2 ) 4 O C O (ii) E nylon ( 2 ) 90(I)4.(c) (i) Molecular mass of C 6 H 5 COCl = 140.5 Molecular mass of Y ( C 6 H 7 N ) = 93 Mass of Y = 93 5 . 140 4 = 2.65 g ( 1.5 ) (ii) Molecular mass of amide ( C 13 H 11 NO ) = 197 For 4 g C 6 H 5 COCl used, mass of amide formed ( 100% ) = 197 5 . 140 4 = 5.61 g % yield = 61 . 5 4 100% = 71.3 % ( 1.5 ) 90(II)8.(a) (i) Titration of known concentration of compound against standard base. ( 2 ) (ii) Decolourization of bromine water. ( 2 ) (iii) By adding aq. AgNO 3 to A and B respectively. ( 1 ) White precipitate of AgCl will be formed for B . ( 1 ) While there is no precipitate formed for A . ( 1 ) (iv) After hydrogenation, the product is Cl CH 2 CH COOH COOH CH 3 CH 3 ( 1 ) It is not optically active, as it has no chiral centre ( 1 ) / This compound is superimposable with its mirror image. 91(I)1.(e) CH 3 CH 3 KMnO 4 /H COOH COOH HOCH 2 CH 2 OH H + C C OCH 2 CH 2 O O O + n n (1/2) (1/2) (1/2) (1/2) (1) Carboxylic acids...
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RCOOH ANS - Carboxylic acids Acid/ALA/P.1 90(I)1.(c) SOCl 2...

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