ORGANIC CHEMISTRY
Daily Practice Problems
Q11. Give theIUPAC names ofthe following :
(a) 2-methyl-1,3-butandiol (b) 2, 3-dimethylbutanal (c) 1, 2-diethoxyethane
(d) Ethyl-2-methylbutanoate (e) 3, 4-dimethylpentanal (f) 2, 3-dicholoro
(g) 2-phenylethanol (h) 2,4 dimethylpentanol
(i) 2-ethoxy-4-methoxy2-pentanone (j) 2-methylpropan-2ol
(k) 2, 3-dibromo-2methyl
CLASS : XI ANSWERS DPP. NO.- 3
CLASS : XI ANSWERS DPP. NO.- 4
Q.1 Write IUPAC nameofthe following compound.
(1) propane-1, 2, 3 triol (2) 1–chloropentane
(3) octa-1, 11-dienoic acid
(4) Ethyl-5-bromo-3-methylhexanoate
(5) 7-hydroxy-3methoxyhex-5-enal-5-methyl
(6) 2-Bromo-5-(2-hydroxyethyl)-7-ethoxyoctanamide
(7) N-ethyl-Nmethyl-3-hexanamine
(8) ethyl-3-hydroxybutanoate (9) 3-methoxypentanoylchloride
(10) 5–butyl-hept-6-ene-2-one
(11) 1-bromo-5-hydroxyhept-6-yn-3one (12) N-methyl-N-phenylmethanamide
(13) hepta-1,6-dien-3yne (14) methyl-3-bromo-3 hydroxy-2-methylbutanoate
(15) N, 3-dimethyl-4-bromo-2-hydroxyhept-4en-6-ynamide
(16) 5-oxopentanoic acid
(17) 2-(2-chloroethyl)pent-2-ene
(18) 2-(1-Methylethyl)-3-(3, 3-dimethylbutyl)penta-1, 4-diene
(20) 3-cyanopropanoic acid
(21) 5-butyl-2, 8-dimethyl-7-propyl-decane
CLASS : XI ANSWERS DPP. NO.- 6
Q.1 :
Q.2 Five isomers of C5H12 are (A) CH2 = CH–CH2–CH2–CH3
(B) CH3CH=CH–CH2–CH3
(C)
3
3
3
CH
|
CH
CH
C
CH 


(D)
3
2
2
3
CH
|
CH
C
CH
·
CH 

(E)
3
2
3
CH
|
CH
CH
CH
CH 


C5H11Clin eachcase are as follows:
A: 2 B:2 C: 2 D : 2 E : 2

Total for allA, B, C, D, & E are 6
Q.3 chain isomer of but-1-ene is
3
3
2
CH
|
CH
C
CH 

Q.4 Chain isomers :(ii) &(v); (iii) &(vi); (i) &(vii)
Q.5 ; ;
Q.6 (a)positional (b) chain (c) chain
Q.7 (a) i &ii & vi (b) iii& iv (c) v & vii
Q.8 (i) (ii) (iii) (iv)
Q.9 (i) CH3–CH2–CH2–CH2–Br (ii)
3
2
3
CH
|
Br
CH
CH
CH 


(iii)
Br
|
CH
CH
CH
CH 3
2
3 

 (iv)
3
3
3
CH
|
Br
C
CH
|
CH


Primaryhalide:(i) &(ii) secondary: (iii) &Tertiaryis (iv)