CH 4 & CH 5 IMP MCQ

Name the following compounds according to IUPAC system of nomoenclature : (I ) CH_3 CH(CH_5 ) CH_2 CH_2 CHO (ii) CH_3 CH_2 COCH (C_2H_5 ) )CH_2CH_2Cl (iii ) CH_3 CH=CHCO (iv ) CH_3 COCH_2 COCH _3 (v) CH_2 CH(CH_3)CH_2C(CH_3)_2 COCH_3 (vi ) (CH_3 )_2 C CH_2 COOH (vii ) OHC C_6 H_4 CHO -p

Place the following alcohols in decreasing order of rate of dehydration with concentration H_2SO_4 . 1. CH_3CH_2CH(OH)CH_2CH_2CH_3 2. (CH_3)_2C(OH)CH_2CH_2CH_3 3. (CH_3)_2C(OH)CH(CH_3)_2 4. CH_3CH_2CH(OH)CH(CH_3)_2 5. CH_3CH_2CH_2CH_2CH_2CH_2OH

IUPAC name of C_2H_5-CH(C_2H_5)-CH(Cl)-CH(CH_3)-CH_2-CH_2-CH_3

Name the following halides according to IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides: (i) (CH_(3))_(2)CHCH(Cl)CH_(3) , (ii) CH_(3)CH_(2)CH(CH_(3))CH(C_(2)H_(5))Cl (iii) CH_(3)CH_(2)C(CH_(3))_(2)CH_(2)I , (iv) (CH_(3))_(3)C CH_(2)CH(Br)C_(6)H_(5) (v) CH_(3)CH(CH_(3))CH(Br)CH_(3) , (vi) CH_(3)C(C_(2)H_(5))_(2)CH_(2)Br (vii) CH_(3)C(Cl)(C_(2)H_(5))CH_(2)CH_(3) , (viii) CH_(3)CH=C(Cl)CH_(2)CH(CH_(3))_(2) (ix) CH_(3)CH=CHC(Br)(CH_(3))_(2) (x) p-ClC_(6)H_(4)CH_(2)CH(CH_(3))_(2) (xi) m-ClCH_(2)C_(6)H_(4)CH_(2)C(CH_(3))_(3) , "(xii)" o-Br-C_(6)H_(4)CH(CH_(3))CH_(2)CH_(3)

IUPAC name is CH_3-CH_2-CH_2-CH(C_2H_5)-CH(CH_3)-CH_2-CH_3

The least and most stable resonating structure respectively are: (1) CH_(2)=CH-CH-CH-C-CH_(3) (2) CH_(2)=CH-CH-CH=C-CH_(3)O^(Theta) (3) CH_(2)-CH-CH=CH-C-CH_(3) (4) CH_(2)=CH-CH=CH-C-CH_(3) (А) 1,4 (В) 2,3 (С) 4,1