1. ORGANIC CHEMISTRY
Daily Practice Problems
CLASS : XI DPP. NO.- 1
Q1. How many and  bonds are present in each ofthe following molecules?
(a) HC  CCH = CHCH3
(b) CH2
 C = CHCH3
Q2. What is the type ofhybridisationofeachcarbon inthe following compounds?
(a) CH3
Cl (b) (CH3
)2
CO (c) CH3
CN (d) HCONH2
(e) CH3
CH=CHCN
Q3. Expand eachofthe following condensedformulae into their completestructuralformulae
(a) HOCH2
CH2
NH2
(b) CH3
(CH2
)3
OH
(c) CH3
CH2
COCH2
CH3
(d) CH3
CH=CH(CH2
)3
CH3
Q4. For eachofthe following compounds, write a more condensedformula and also theirbond-line formula
(a)
3
2
3
CH
|
OH
CHCH
CH (b) O
C
CHCH
CH
CH
CH
CH
CH
CH
|
|
H
Br
2
2
2
2
2
2
3 
(c) HOCH2
CH2
CH2
CHCH3
CHCH3
CH3
(d) N
C
CH
C
N
|
OH




Q5. Expands eachofthe followingbond-line formulae to showallthe atomsincludingcarbonand hydrogen.
(a) (b) (c) (d)
Q6. Write the bondline formulae for : tert–Butylcyclopentane, Isopropylalcohol, Phenylneopentylether,
Benzene isocyanide,
Q7. Draw the formulae for the first members of each homologous series beginning with the following
compounds. (a) H–COOH, (b) CH3
COCH3
; (c) H–CH=CH2
Q8. Identifythe functionalgroups inthefollowing
(A) (B)
(C) (D)
Q9. Isomers arethe compounds having samemolecular formula and different structuralformula.
How manyprimaryalcohols isomers ofC5H11OH are possible?
(A) 1 (B) 3 (C) 4 (D) 8
Q10. Whichofthe following is not a neo structure?
(A) (B) (C) (D)

2. Q11. Number ofpossible alkylgroups ofisopentane are
(A) 1 (B) 4 (C) 5 (D) 6
Q12. The minimumnumberofcarbon atoms inan alkyne having one quaternarycarbonatomis
(A) 5 (B) 6 (C) 7 (D) 4
Q13. The minimumnumber ofcarbon atoms inanalkene having aquaternarycarbon is
(A) 8 (B) 4 (C) 5 (D) 6
Q14. The minimumnumber ofcarbonatoms inanalkane having four primarycarbon atomsis :
(A) 4 (B) 8 (C) 5 (D) 6
Q15. The minimumnumber ofcarbon atoms inan alkane, alkene and alkyne with one smallest side chain is
givenbythe set
(A) 3, 4, 5 (B) 4, 4, 5 (C) 4, 5, 5, (D) 4, 6, 4
Q16. The minimumnumber ofsecondarycarbonatoms required to forma ring is
(A) 6 (B) 5 (C) 3 (D) 4
Q17. Allthe following are composed ofsecondarycarbonatoms onlyexcept
(A) propane (B) Cylohexane (C)Aniline (D) Phenol
Q18. The simplest alkene containing three primarycarbonatoms is
(A) Isobutylene (B) –butylene (C) –butylene (D) Isopentane
Q19. The simplest alkyne containing at least one primary, one secondary and one tertiary carbon atom is
named
(A) Isobutyne (B) 2–methyl–1butyne (C) 3–methyl–1butyne (D) 2–methyl–3–butyne
Q20. The number ofprimary, secondary, tertiaryand quaternarycarbon atoms in iso–octane is givenbythe
set
(A) 5, 0, 2, 1 (B) 5, 1, 0, 2 (C) 5, 1, 1, 1 (D) 5, 2, 0, 1
Q21. Whichofthe following carbonskeletonsare identical
(a)
C
C
C
C
C
C
C
C
C
|
|
|
|



 (b)
C
C
C
C
C
C
C
C
C
|
|
|
|



 (c)
C
C
C
C
C
C
C
C
C








|
|
|
(d)
C
C
C
C
C
C
C
C
C






|
|
(A) a, b (B) a, d (C) b, c (D) b, d
Q22. The structure oft-butylchloride is:-
(A) CH3
–CH(Cl)–CH2
–CH3
(B)
3
2
3
|
CH
Cl
CH
CH
CH 


(C) CH3
–CH2
–CH(Cl)–CH3
(D) (CH3
)3
C-Cl
Q23. The totalnumberofcarbonatoms and the number ofsp3
hybridisedcarbon atoms inthesimplest alkyne
containing a tertiarycarbon atomis givenbythe set:-
(A) 3, 4 (B) 5, 3 (C) 3, 2 (D) 4, 2

3. ORGANIC CHEMISTRY
Daily Practice Problems
CLASS : XI DPP. NO.- 2
Q1. Give theIUPAC names ofthe following :
(a) (b) (c)
(d) (e) (f)
(g) (h) (i)
(j) (k) (l)
(m) (n)
(o)
(p) (q)

4. (r)
1
2
2
3
4
5
6
CH
CH
·
CH
CH
·
C
CH 

 (s) (t)
Q2. Structures andIUPAC names ofsomehydrocarbons are givenbelow. Explainwhythe nemsgiveninthe
parenthesis are incorrect.
(a)
(b)
(c)
Q3. Which ofthe following represents thecorrect IUPAC name for the compounds concerned:
(a) 2, 2–Dimethylpentane or 2–Dimethylpentane
(b) 2, 3–Dimethylpentaneor 3, 4–dimethylpentane
(c) 2, 4, 7–Trimethyloctane or 2, 5, 7–Trimethyloctane
(d) 2–Chloro–4–methylpentane or 4–chloro–2–methylpentane
Q4. Writethestructuralformulaeofthefollowing:
(a)3–Ethyl–3–methylpentane (b) 3–Ethyl–2, 2–dimethylpentane
(c) 3–Ethyl–2, 2, 3–trimethylhexane (d) 2, 2, 4, 4–Tetramethylpentane
(e) 4–(1, 1–dimethylethyl)–3–ethyl–4, 7–dimethyldecane

5. ORGANIC CHEMISTRY
Daily Practice Problems
Q1. IUPAC name ofthe following compound is:
(A) 2–Cyclohexylbutane (B) 2–Phenylbutane
(C) 3–Cyclohexylbutane (D) 1–Methylpropylcyclohexane
Q2. The correct name for the compound CHO
CH
CH
CH
CH
CH
|
|
Br
OH
2
2
3 



 is
(A) 2–bromo–5–hydroxy–1–hexanal (B) 1–bromo–4–hydroxypentanal
(C) 2–hydroxy–5–bromo–6–hexanal (D) none of the above
Q3. Whichofthe following compound haswrong IUPAC name
(A) CH3–CH2–CH2–COO–CH2CH3 ethylbutanoate
(B) 3–methylbutanal
(C) 2–methyl-3-butanol
(D) 2–methyl–3-pentanone
Q4. IUPAC name of
(A) 2–Cyano–3–methylhexane (B) 2,4, 4–Trimethylpentanenitrile
(C) 2,2–Dimethyl–4–cyanopentane (D) 2–Cyano–3–methylhexane
Q5. The IUPAC name of the compound is
(A) 4–methylcyclopent–1–en–2–ol (B) 5–methylcyclopent–2–en–1–ol
(C) 2–methylcyclopent–4–en–1–ol (D) 3–methylcyclopent–1–en–2–ol
CLASS : XI DPP. NO.- 3

6. Q6. The IUPAC name ofthe compound, is
(A) 2-cyano-2-methyl-4-oxopentane (B) 4-cyano-4-methyl-2-pentanone
(C) 4-cyano-4-methyl-2-oxopentane (D) 2, 2–dimethyl–4–oxopentanenitrile
Q7. The IUPAC name ofOHCCH= is
(A) 5–vinyloct–3–en–1–al (B) 4–butyl–2, 5–hexadien–1–al
(C) 5–vinyloct–5–en–8–al (B) 3–butyl–1, 4–hexadien–8–al
Q8. The structuralformulaofcyclohexylalcoholis
(A) (B) (C) (D) noneofthese
Q9. The IUPAC name for the compound is
(A) 2–amino–3–hydroxypropanoic acid (B) 1–hydroxy–2–aminopropan–3–oic–acid
(C) 1–amino–2–hydroxypropanoic acid (D) 3–hydroxy–2–aminopropanoic acid
Q10. The IUPAC name ofcitric acid is
(A) 1, 2, 3 –Tricarboxy–2–propanol (B) 3–Carboxy–3–hydroxy–1, 5–pentanedioic acid
(C) 2–Hydroxypropane–1, 2, 3–tricarboxylic acid
(D) 3–Hydroxy–1, 2, 3–tricarbocypropane
Q11. Give theIUPAC names ofthe following :
(a) (b) (c) CH3O–CH2–CH2–OCH3
(d) (e) (f)
(g) (h)
(i) (j) (CH3)3COH (k)

7. Q12. Give IUPACnames for the following substituted alkanes:
(a) (b) (c)
(d) (e) (f)
(g) (h) (i)
(j) (k) (l)

8. ORGANIC CHEMISTRY
Daily Practice Problems
Q.1 Write IUPAC nameofthe following compound.
(1)
2
2
2 CH
CH
CH
|
|
|
OH
OH
OH


(2) OHCH2CCCH2OH
(3) CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOH
(4) 5
2
2
2
3
3
H
COOC
CH
CH
CH
CH
CH
|
|
CH
Br





(5) CHO
CH
CH
CH
C
CH
CH
CH
|
|
|
OCH
CH
OH
2
2
3
3
3







(6)
2
2
2
2
3
2
2
5
2
CONH
CH
CH
CH
CH
CH
CH
CH
|
|
|
Br
OH
CH
CH
H
OC







(7)
5
2
3
3
2
2
2
3
H
C
CH
/
N
|
CH
CH
CH
CH
CH
CH 




(8) 3
2
2
3 CH
OCH
C
CH
CH
CH
|
|
|
O
OH




 (9) Cl
C
CH
CH
CH
CH
|
|
|
O
OCH
2
2
3
3





(10)
2
3
2
2
2
2
2
3
CH
CH
|
CH
CH
CH
CH
CH
CH
CH
C
CH
|
|
O









(11)
O
OH
|
|
|
Br
CH
CH
C
CH
CH
C
CH 2
2
2 





 (12)
5
6
3
H
C
O
|
|
|
CH
N
C
H 


(13) CH2=CHCCCH2–CH=CH2 (14)
OH
Br
|
|
COOCH
C
CH
CH
|
CH
3
3
3



(15)
OH
Br
|
|
CONHCH
CH
CH
C
CH
C
CH
|
CH
3
3





 (16) CHO–CH2–CH2–CH2–COOH
CLASS : XI DPP. NO.- 4

9. (17)
2
2
2
2
2
3
CH
CH
Cl
|
CH
C
CH
CH
CH





 (18)
2
2
2
3
3
3
2
2
CH
|
|
CH
CH
CH
C
CH
)
CH
(
|
)
CH
(
C
CH
CH





(19)
3
5
2
2
CH
|
H
OC
C
C
CH
|
|
O


 Q.20 HOOC–CH2–CH2CN
(21)
3
3
3
3
3
2
2
2
2
2
3
3
2
2
CH
|
CH
CHCHCH
CH
|
|
CH
CH
CH
CH
CH
CH
CH
CH
CH
CH
|
CH
CH
CH









Q.2 Give theIUPAC name ofthe following :
(1) (2) (3)
(4) (5) (6)
(7) (8) (9)
(10) (11) (12) (13)
Q.3 Write structure formulafor the givencompound
(1) 3-Bromo-4,4-dimethylcyclohexanol
(2) 5-Methyl-2,3,5,6-diepoxyoctane
(3) 2-Butyl-4-chloro-5-methylhexa-2,4-dienoylchloride
(4) 1,2-Epoxycyclo hexane
(5) Tetra methoxymethane
(6) 1,4-Diisopropoxybutane
(7) 4-Bromo-N, N-dimethylpentan-2-amine
(8) N-Phenyl prop-2-ene amide

10. ORGANIC CHEMISTRY
Daily Practice Problems
Q1. Molecular formula C6H14O willshow:
(A)Functionalisomerism (B) Chainisomerism (C) Metamerism (D)Allofthese
Q2. Molecular formula C5H12O willshow:
(A)Positionisomerism (B) Chainisomerism (C) Functionalisomerism (D)Allofthese
Q3. Chainisomerismis possible in:
(A)Alkanes (B)Alkenes (C) Carbonylcompounds (D)Allofthese
Q4. Whichamongthe following willnot show chainisomerism:
(A)C3H8 (B) C4H10 (C) C5H12O (D) C5H10O
Q5. 2–Pentene contains
(A) 15  & one  bonds (B) 14  & one  bonds
(C) 14  & one  bonds (B) 14  & no  bonds
Q6. The number ofprimaryamines offormula C4
H11
Nis
(A) 1 (B) 2 (C) 3 (D) 4
Q7. An isomer ofpropanalis
(A)Acetone (B) Propane (C)Ethanol (D) Propanol
Q8. The number ofpossible alkynes withmolecular formula C5
H8
is
(A) 2 (B) 3 (C) 4 (D) 5
Q9. Isomers ofpropionic acid are
(A) HCOOC2
H5
& CH3
COOCH3
(B) HCOOC2
H2
& C3
H7
COOH
(C) CH3
COOC2
H5
& C3
H7
OH (D) C3
H7
OH & CH3
COOCH3
Q10. Considerthefollowing statements:
(1) Chainand positionisomerismis not possible together betweentwo isomers.
(2) Tautomerism is a chemicalphenomenone whichis catalysed byacid as wellas base.
(3)Tautomersare always metamers
(4)Tautomers arealways functionalisomers
Select thecorrect answer using the codes givenbelow:
Codes:
(A) Only3 is correct (B) 3 & 4 are correct
(C) 1, 2 & 4 are correct (D) 1, 2 & 3 are correct
Q11. Whichamongthe following compounds willshowtautomerism:
(A) 2,2–dimethylpropanal (B) 2,2–dimethyl–1–nitropropane
(C) 2, 4 pentanedione (D)Benzophenone
Q12. Tautomerismisshownby:
(A) 3
2
3 CH
C
CH
C
CH
||
||
O
O



 (B) 5
2
2
3
||
H
COOC
CH
C
CH
O



CLASS : XI DPP. NO.- 5

11. (C) (D)Allofthese
Q13. Whichone ofthe following compounds willnot show tautomerism?
(A)
3
3
5
6
3
CH
|
CH
C
C
H
C
|
||
CH
O


 (B) 5
2
2
2
3
||
H
COOC
CH
C
CH
CH
O




(C) 3
3
||
CH
C
CH
O

 (D) CH3–CH2–C  N
Q14. Whichstatement iscorrect for keto-enoltautomerism?
(A)Tautomers are present inequilibriumstate (B) Generallyketo formis more stable then enolform
(C)Tautomerismisa reversible phenomenoninbothgas &solution
(D)Allare correct
Q15. Whichstatement iscorrect for tautomerism:
(1) It isa chemicalphenomenon (2) This phenomenontakes place onlyin gases state
(3) This phenomenon takes place insolid state (4)Tautomersare functionalisomers
(5) Number of &lone pair present in both tautomer is same.
Ofthese correct statements are:
(A) 1, 2 and 3 (B) 1, 4, 5 (C) 3, 4, 5 (D) 1, 2, 3 & 4
Q16. Tautomerismis exhibited by
(1) C6
H5
–CH=CH–OH (2)
(3) (4)
(A)Allfour (B) II, III & IV (C) I, III & IV (D) noneofthese

12. ORGANIC CHEMISTRY
Daily Practice Problems
Q.1 Write chainisomer of CH3CH2CH2CH2OH
Q.2 C5H12 has three isomers. Theyare converted into C5H11Cl.How manytypes ofC5H11Clare obtained
in each case?
Q.3 What is chainisomer of1–butene?
Q.4 Select the pairisomers fromthe following:
(i) (ii) (iii) (iv)
(v) (vi) (vii)
Q.5 Make chainisomer ofcyclopentane.
Q.6 Considerthe following
(i) CH3CH2CH2CH2Cl (ii)
Cl
|
CH
CHCH
CH 3
2
3 (iii)
3
2
3
CH
|
Cl
CHCH
CH (iv)
l
C
|
CH
C
CH
|
CH
3
3
3


What is the type ofisomerismshown by
(a) (i) and (ii) ........... (b)(ii) and (iv) ......... (c) (i) and (iii) ...............
Q.7 Select identicalpairs out of
(i) (ii) (iii) (iv) (v)
(vi) (vii)
(a) ........... ........... (b) ........... ........... (c) ........... ...........
Q.8 Write positionisomers of
(i) ............... (ii) ................ (iii) ................ (iv) .................
CLASS : XI DPP. NO.- 6

13. Q.9 There arefour alkylbromides withthe formula C4H9Br. Writetheir structuralformulae andclassifyeach
as to whether it is a primary, secondaryor tertiaryalkylbromide.
Q.10 Writestructuralformulae foreachofthe following:
(a) threeprimaryalcohols and onetertiaryalcoholwith the formula C4H8O
(b)Asecondaryalcoholwith the formula C3H6O
(c)Acyclic ester with the formula C4H6O4
Q.11(a) Cyclic compounds ofthe generaltype shown here are called lactones. What functionalgroup does a
lectonecontain?
(b) Write anythree structuralisomers ofC6H10O.
Q.12 C5H12O represents alcohols and ethers. Write structure of
(a) a primaryalcohol.................
(b) a secondaryalcohol ...........
(c) a tertiaryalcohol............
(d) a tertiaryether ...........
(e) a secondary ether .............
(f) a primaryether .............
Q.13
Write
(a) metamer of(A) ..........
(b) functionalisomer of(A) ...........
(c) positionisomer of(A) .............
Q.14 What istype ofisomerismshownbyfollowing pairs?
(a) CH3CH2NHCH2CH3 and
(b) and
(c) CH3CH2CH = CHCH2CH3 and CH3CH=CHCH2CH2CH3
Q.15 Write metamers of
Q.16 Write allthe isomers ofthe formula C5H10O2 and the select pair ofone type ofisomers.
Q.17 C8H10O has two isomers I and II
(i) (ii)
Identifythe products in each case when theyreact with PCl5 and thenwith aq. KOH.

14. ORGANIC CHEMISTRY
Daily Practice Problems
Q1. Whichstatement iscorrect for inductive effect:
(A) It is a permanent effect (B) It is the propertyofsigma bond
(C) It causes permanent polarisation inthe molecule (D*)Allare correct
Q2. Which oneofthe following ismost acidic:
(A) 2–propanol (B) 2–methyl–2–propanol (C)Ethanol (D*) Methanol
Q3. Whichone ofthe following isstrongest acid
(A*) 2–chloropentanoic acid (B) 3–chloropentanoic acid
(C) 5–chloropentanoic acid (D) 4–chlorpentanoic acid
Q4. Decreasing –I power ofgiven groups is
(1) –CN (2) –NO2
(3) –NH2
(4) –F
(A*) 2 > 1 > 4 > 3 (B) 2 > 3 > 4 > 1 (C) 3 > 2 > 4 > 1 (D) 3 > 2 > 1 > 4
Q5. The correct decreasing order ofelectronegativityoforabitals is:
(A*) s > sp > sp2
> p (B) s > sp2
> sp > p (C) s > p > sp > sp2
(D) s > p > sp2
> sp
Q6. Arrange electronegativityofgivenorbitals indecreasing order:
(1) s (2) sp (3) sp3
d2
(4) sp3
(A*) 1 > 2 > 4 > 3 (B) 1 > 2 > 3 > 4 (C) 2 > 1 > 4 > 3 (D) 2 > 1 > 3 > 4
Q7. For whichcarboxylic acid, the pKa value is the lowest:
(A) CH3–CH2–COOH (B*) CH  C–COOH
(C) CH3–CH2–CH2COOH (D) CH2=CH–COOH
Q8. Which one ofthe following carbocations is most stable?
(A) CH3–CH2–

2
CH (B) CH3–CH2–CH2–

2
CH
(C) CH3–

CH –CH3 (D*) CH3–CH2–

CH –CH3
Q9. Basic strength of CH  C
, CH2
= CH

(II), CH3
– C H

2 (III) will be in order :
(A*) I < II < III (B) II < III < I (C) III < II < I (D) III < I < II
Q10. Acidic nature of CH3
OH(I), CH3
SH(II) and CH3
NH2
(III) is in order:
(A) III < II < I (B*) III < I < II (C) I < II < III (D) II < I < III
Q11. The correct arrangement of acid strength in decreasing order is –
(A) (CH3
)3
CCOOH > CH3
COOH > CCl3
COOH > O2
NCH2
COOH
(B) CH3
COOH > (CH3
)3
CCOOH > O2
NCH2
COOH > CCl3
COOH
(C) O2
NCH2
COOH > (CH3
)3
CCOOH > CH3
COOH > CCl3
COOH
(D*) CCl3
COOH > O2
NCH2
COOH > CH3
COOH > (CH3
)3
CCOOH
Q12. Increasing order of pKa
values.
(1) Me2
CHCOOH (2) Me3
CCOOH (3) CH3
COOH
(4) MeCH2
COOH (5) Me(CH2
)2
COOH (6) Me(CH2
)3
COOH
[Ans: 3 < 4 < 5 < 6 < 1 < 2 ]
CLASS : XI DPP. NO.- 7

15. Q13. Increasing order of pKa
values.
Cl
(1) F – CH2
– COOH (2) ClCH2
– COOH (3) CH – COOH
Cl
Cl
|
(4) Cl – C – COOH (5) Br – CH2
–COOH (6) CH3
COOH
|
Cl [Ans: 4 < 3 < 1 < 2 < 5 < 6]
Q14. Increasing basic strength
NO2
| ..
(1) CH3
NH2
(2) NO2
– C – NH2
(3) Cl – CH2
–NH2
|
NO2
(4) I – CH2
–NH2
(5) NH3
[Ans: 2 < 3 < 4 < 5 < 1]
Q15. Basic strength(dec. order)
(1) BrCH2
CH2
– NH2
(2) I – CH2
CH2
–NH2
(3) NH3
(4) CH3
–NH2
[Ans: 4 > 3 > 2 > 1]
Q16. Arrange in decreasing pKb
(i) F–CH2
CH2
COOH (ii) Cl–CH–CH2
–COOH (iii) F – CH2
–COOH
|
Cl
(iv) Br – CH2
–CH2
–COOH [Ans: (iv) < (i) < (ii) < (iii)]
Q17. Arrange thefollowing compounds inorderofincreasing basicity.
(a) CH3NH2, CH3

3
NH , CH3NH–
(b) CH3O–, CH3NH–, CH3

2
CH
(c) CH3CH = CH–, CH3CH2

2
CH , CH3CC– [Ans: (a) 3 > 1 > 2, (b) 3 > 2 > 1, (c) 2 > 1 > 3]
Q18. Arrange thefollowing as stated:
Increasing order ofacid strength
(i) ClCH2
COOH, (ii) CH3
CH2
COOH, (iii) ClCH2
CH2
COOH, (iv) (CH3
)2
CHCOOH, (v) CH3
COOH
[Ans: (iv) < (ii) < (v) < (iii) < (i)]
Q19. The structure of the enol form of CH3
–CO–CH2
–CO–CH3
with intramolecular hydrogen bonding
is _____________. [Ans:
O
OH
||
|
CH
C
CH
C
CH 3
3







 ]
Q20. Which of the following acids has the smallest dissociation constant?
(A) CH3
CHFCOOH (B) FCH2
CH2
COOH
(C*) BrCH2
CH2
COOH (D) CH3
CHBrCOOH

16. ORGANIC CHEMISTRY
Daily Practice Problems
Q1. What is the order of acidity ofthe following compounds?
EtCO2
H CH3
CO2
H CH3
SO3
H CF3
SO3
H
a b c d
(A) b > a > d > c (B) d > c > a > b (C*) d > c > b > a (D) d > a > b > c
Q2. In urea which of the following information is correct?
(A) C–N bond distance in urea is less than that of aliphatic amine.
(B) both nitrogen atoms are identical in urea molecule .
(C) urea acting as monoacidic base (D*) all are correct
Q3. In PhSO3
H whichofthe following statement is correct?
(A*) mpositionis relativelyhighlyelectron dense w.r.t. o & p positions.
(B) ring becomes electron dense due to +R effect ofSO3
H group.
(C) ring becomesless reactive towards nucleophile (D) none
Q4. Vinylhalideis represented inthefollowing resonating structures
 
The order ofstabilityofresonating structureare as follows
(A*) a > b > c (B) a > c > b (C) a = b = c (D) none
Q5. In enamines  carbonacting as nucleophilic centre. Structure ofenamine is given below
The reason is
(A)  carbon is sp2
hybridised which is acting as nucleophile.
(B)  carbon is attached with two groups having +I effect.
(C*) due to resonance  carbon having –ve charge
(D) none
Q6. Allylbromide when reacts with HBr, 1, 2, dibromide is formed because of
(A)Inductiveeffect (B)Tautomerism (C*)Hyperconjugation (D)nonpolarmechanism
Q7. Arrange in increasing order of Ka value
(a) CH3
CN, (b) CH3
Cl (c) CH3
NO2
Arrange in decreasing order of pKb
value
(a)CH3
NH2
(b) NH3
(c) CH3
CONH2
Q8. Explain the following facts:
(a) R – C

= O is less stable than R–C O

(b) Aromatic amines are weaker base than aliphatic amines.
(c) Metal hydride are stronger base than metal hydroxide.
Q9. Arrange the followinggroups indecreasing order of+I effect.
– ,
.
2
CO



 , –CR3, R2CH–, –D, H
CLASS : XI DPP. NO.- 8

17. Q10. In eachofthe following pairs which is more stable :
(a)
(b) (c)
(d) (e)

18. ORGANIC CHEMISTRY
Daily Practice Problems
Q1. Which ofthe following acting as Lewis acid?
(A*) SO3
(B) Benzene (C) 3
H
C (D)Acetylene
Q2. Which of the following acting as nucleophile?
(A) RLi (B) RMgX (C) RO–
(C*) All
Q3. Which of the following acting as electrophile?
(A) Diazoniumion (B) Tertiarybutyl carbonium ion
(C) Iodine monochloride (D*)All
Q4. What is the correct order of acidity of the following hydra-acid?
(A) HF > HCl > HBr > HI (B) H2
O > H2
S > H2
Se > H2
Te
(C) H2
O < H2
S < H2
Se < H2
Te (D*) HI > HBr > HCl > HF
Q5. Which of the group attached with benzene ring shows –R effect?
(A) 3
R
N

 (B*) 3
R
P

 (C) –C2
H5
(D) –OMe
Q6. Which of the following ring is most reactive towards electrophile ?
(A) PhH (B) PhCl (C*) PhOMe (D) PhNO2
Q7. Which of the following is aromatic species?
(A) (B) (C) (D*)All
Q8. Which of the following is anti-aromatic species?
(A) (B) (C) (D*)
Q9. Which of the following is non-aromatic?
(A) (B*) (C) (D)
Q10. Which of the following is non-aromatic?
(A) (B) (C*) (D)
CLASS : XI DPP. NO.- 9

19. ORGANIC CHEMISTRY
Daily Practice Problems
Q 1. Identifythe reagentsshown inbold inthe following equations asnucleophiles or electrophiles:
(a) CH3COOH + HO– — CH3COO– + H2O
(b) CH3COCH3 + N
C
–
— (CH3)2C(CN)(OH)
(c) C6H5 + O
C
CH3

— C6H5COCH3
Q2. Classifythe followingreactions inone ofthe reactiontype studiedin this unit.
(a) CH3CH2Br + HS– — CH3CH2SH
(b) (CH3)2C = CH2 + HCl — (CH3)2ClC
(c) CH3CH2Br + HO– — CH2 = CH2 + H2C
(d) (CH3)3C – CH2OH + HBr — (CH3)2 CBrCH2CH
Q3. What is the relationship between the members offollowing pairs of structures?Are theystructuralor
geometricalisomers or resonance contributors?
(a) (b)
(c)
Q4. For the following bond cleavages, use curved-arrows to show the electron flow and classifyeach as
homolysisorheterolysis. Identifyreactiveintermediateproducedasfreeradical,carbocationandcarbanion.
(a) CH3O – OCH3 — CH3

O +

OCH3 (b) + –OH — + H2O
(c) — + Br– (d) + E+ —
Q5. Whichofthe following carbocation ismost stable?
(a) (CH3)3C. 2
H
C

(b) (CH3)3

C (c) CH3CH2 2
H
C

(d) CH3 H
C

CH2CH3
Q6. Thereaction: CH3CH2I + KOH(aq) — CH3CH2OH + KI is classified as:
(a) electrophilicsubstitution (b)nucleophilic substitiution
(c)elimination (d) addition
Q7. An alkene ‘A’on ozonolysis gives a mixture ofethanaland pentan-3-one. Write structure and IUPAC
name of‘A’.
Q8. Explainwhythe givensystems are not aromatic? (i) (ii) (iii)
Q9. Addition of HBr to propene yields 2-bromopropane, while in the presence ofbenzoyl peroxide, the
same reactionyields 1-bromopropane. Explain and give mechanism.
Q10. Which of the follwing acting as electrophile?
(A) H–
(B) NH3
(C) H2
O (D*) BF3
CLASS : XI DPP. NO.- 10

20. ORGANIC CHEMISTRY
Daily Practice Problems
Q1. Arrange benzene, n-hexane and ethyneindecreasing order ofacidic behaviour.Also givereasonfor this
behaviour.
Q2. Whydoesbenzene undergo electrophilicsubstitutionreactions easilyandnucleophilicsubstitutionswith
difficulty?
Q3. How wouldyou convert the following compunds into benzene?
(i)Ethyne (ii)Ethene (iii)Hexane
Q4. Write structures ofallthe alkenes whichonhydrogenationgive 2-methylbutane.
Q5. Arrangethefollowingset ofcompoundsinorderoftheirdecreasingrelativereactivitywithanelectrophile,
E+
(a) Chlorobenzene, 2, 4-dinitrochlorobenzene,p-nitrochlorobenzene
(b) Tolunene, p-H3C – C6H4 – NO2, p-O2N – C6H4 – NO2.
Q6. Using curved arrownotations, show the formationofreactive intermediateswhenthefollowing covalent
bonds undergo heterolytic cleavage.
(a) CH3 – SCH3, (b) CH3 – CN, (c) CH3 – Cu
Q7. Giving justification, categorisethe followingmolecules/ions asnucleophileor electrophile:
HS–, BF3, C2H5O–, (CH3)3N : C

l , C

C
H—
3 =O, H2N
–
: ,

NO2
Q8. Identifyelectrophiliccentreinthefollowing:
CH3CH=O, CH3CN, CH3I.
Q9. Which of thefollowing acting asnucleophile?
(A) CO2
(B) SO2
(C*) H2
C=CH2
(D) all
Q10. Which of the following acting as Lewis base?
(A)Aniline (B) Pyrrole (C) Pyridine (D*)All
CLASS : XI DPP. NO.- 11