STD 6 SANSKRUT CH 4 SEM 2

Which of the following is a stronger acid in each of the following pairs ? (a) CH_2 (Cl ) COOH,CH_2 (F ) COOH " " (b ) CH_2 (Cl) CH_2 CH_2 COOH ,CH_3 COOH , CH_3CH(Cl) CH_2 COOH (c ) CH_3 COOH ,C_6 H_5 CH_2 COOH " " (d ) m-NO_2 C_6 H_4 COOH ,p -NO_2 C_6 H_4 COOH (e ) p-NO_2 C_6 H_4 COOH ,C_6 H_5 COOH " " ( f ) m- OHC_6 H_4 COOH,p- OHC _6 H_4 COOH

The number of amines having pK_(b) less than C_(6)H_(5)NH_(2) among the following is P-CH_(3) C_(6)H_(5)NH_(2), o-CH_(3)C_(6)H_(4)NH_(2), m-CH_(3)C_(6)H_(4)NH_(2), C_(6)H_(5)N (CH_(3)) _(2), C_(6)H_(5)NHCH_(3), p-NO_(2)C_(6)H_(4)NH_(2), p-CIC_(6)H_(4)NH_(2), C_(6)H_(5)CH_(2)NH_(2)

Explain the conversion of C_(6)H_(5)underset("Phenyl acetaldehyde")underset((A))(CH_(2))CHOrarr {:(" "6" "5" "4" "3" "2" "1),(C_(6)H_(5)CH_(2)-CH-CH_(2)-CH_(2)-C-CH_(3)),(" "|" "||),(" "OH" "O),(" "(B)),(" 5-Hydroxy-6-phenylhexan-2-one"):} by using Grignard reagent of BrCH_(2)CH_(2)-underset(O)underset(||)C-CH_(3)(I) and why (C=O) group is protected ?

Write IUPAC name of C_(6)H_(5) - CH_(2) - CH_(2) - CH = CH_(2)

Which of the following polymers are correctly matched ? 2. Nylon - 66 : (-NH-(CH_(2))_(6)-NH-CO-(CH_(2))_(4)-overset(O)overset(||)C-)_(n) 4. N e oprene : (-CH_(2)-overset(Cl)overset(|)C=CH-CH_(2)-)_(n)