South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, … · 2016-04-19 · PART - A (General...
Transcript of South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, … · 2016-04-19 · PART - A (General...
North Delhi : 33-35, Mall Road, G.T.B. Nagar (Opp. Metro Gate No. 3), Delhi-09, Ph: 011-65462244, 65662255South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, New Delhi-16, Ph : 011-26851008, 26861009
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North Delhi : 33-35, Mall Road, G.T.B. Nagar (Opp. Metro Gate No. 3), Delhi-09, Ph: 011-65462244, 65662255South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, New Delhi-16, Ph : 011-26851008, 26861009
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PART - A (General Aptitude)
1. The characteristics of foreign tourists in one year is given in the following pie chart.
American 60%
Others15%
Britain20%
Below 20 years 60%
20-40 years20%
>40 years20%
Tourists country wise American tourists
Total number of tourits = 1, 00, 000
From the pie charts, find the number of American tourists in the age group 20-40 who visited during theyear ?(a) 12000 (b) 20000 (c) 40000 (d) 60000
2. Two goods train each 500m long, are running in opposite directions on parallel tracks. Their speeds are45 km/hr and 30 km/hr respectively. Find the time taken (in seconds) by the slower train to pass thedriver of the faster train.(a) 12 (b) 24 (c) 36 (d) 48
3. Six lectures A, B, C, D, E and F are to be organised in a span of seven days – from Sunday to Saturday,only one lecture on each day in accordance with the following :(i) A should not be organised on Thursday(ii) C should be organised immediately after F(iii) There should be a gap of two days between E and D.(iv) One day there will be no lecture (Friday is noty that day), just before that day D will be organized(v) B should be organised on Tuesday and should not be followed by D.On which day is there no lecture?(a) Sunday (b) Friday (c) Monday (d) Tuesday
4. Find the next number in the series1000, 1500, 2250, ............(a) 2500 (b) 2700 (c) 3375 (d) 3380
5. Find the missing letter(a) H(b) J ?
A E C GB J FC O I UD T L B
(c) L(d) N
6. In the numeration system with base 5, counting is as follows : 1, 2, 3, 4, 10, 11, 12, 13, 14, 20, ....... Thenumber whose description in the decimal system is 69, when described in the base 5 system, is a numberwith :(a) two consecutive digits (b) two non-consecutive digits(c) three consecutive digits (d) three-non consecutive digits
7. Evaluate 3 – [3–(3–3(3+3)}](a) 15 (b) –12 (c) –15 (d) –18
8. A long a yard 300 metres long, 61 trees are planted at equal distances, one tree being at each end of theyard. What is the distance between two consecutive trees?(a) 4.92 m (b) 5 m (c) 5.12 m (d) 6 m
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9. In how many different ways can be the letters ofteh word ‘HORROR’ be arranged?(a) 60 (b) 90 (c) 120 (d) 720
10. Today is Monday, After 100 days it will be ?(a) Wednesday (b) Thursday (c) Friday (d) Saturday
PART-B (Organic Chemistry)
11.
CHOH
Me
(i) NaBH4/CeCl3(ii) tBuOOH/Ti(OPni)4
(A)
(–) DET
The major product ?
(a)
H
Me
OH
OH
(b)
H
Me
OH
O(c)
H
Me
OH
OH
(d)
H
Me
OH
O
12.
Ph
O
(i) m-CPBA/CH2Cl2(ii) NaOH/H2O
(A)
The major product?
(a)
Ph
OH
O
HO
(b) OO
Ph
(c)
Ph
OH
O
MeO
(d) HOOC
Ph
OH
13.CN
Ph
(i) NaOH/ Br(ii) DIBAL/H2O
(A)
The major product?
(a) CHO
Ph(b)
CN
Ph
Me
(c) CHO
Ph(d)
CH2OH
Ph
14.
O
(i) BF3.Et2O
(ii) LDA/THF/–78ºC/Me–I(A)
What is the major product (A)
(a)
O
Me (b)
OH
Me (c)
Me
O (d)
MeO
Me
Me
Me
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15.
Br
OMe
H
(i) DBU
(ii) MeMgBr/CuBr/dry ether(A)
(a)
Me
OMe
H
(b)
OMe
HMe
(c)
OMe
HMe
(d)
Me
H
C
O
OMe
16. Among the rate of hydrolysis of following alkyl halide in decreasing order
(I) CBr3
(II) CHBr2
(III) CH2Br (IV) PhCH2Br
(a) I > II > III > IV (b) II > I > III > IV (c) IV > III > II > I (d) III > II > IV > I
17. Which among the following gives the positive Tollens test.(a) Maltose (b) Sucrose (c) Amylose (d) Cellulose
18. Consider the following statements about amino acids the incorrect one is:(a) all the naturally occurinsg amino acids that occours as the constituents of proteins belongs to L-series(b) gly is the only amino acid which does not possess a chiral centre.(c) an important sensitive test for detection of amino acids is nin-hydrin test(d) nitrus acid librates nitrus oxide from amino acids.
19. The major product (P) formed in the following reaction sequence is
C
O
Ph H2C Ph
hv (P)
(a)
Ph
(b)
PhHO
Ph(c)
PhPh
(d)
PhHO
20. The following compounds are
(I)
ClO4
(II) (III)
(a) I-Quasi aromatic, (II) homoaromatic, (III) aromatic(b) I-Quasi aromatic, (II) aromatic, (III) homo aromatic(c) (I) homo-aromatic, (II) Quasi aromatic, (III) aromatic(d) (I) homo-aromatic, (II) aromatic, (III) Quasi aromatic.
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21. The major product (P) formed in the following reaction sequence is
R1R2
OH
OH
(i) AcBr, MeC(OMe)3(ii) K2CO3, MeOH
(P)
(a) R1
R2
O(b)
R1
R2
O
(c) both (a) and (b) in equal amounts (d) (a) is major and (b) is minor.
22. The major product (P) formed in the following reaction sequence isCO2H
NH2
(i) BH3.Me2S
(ii) NaOH(iii) NaNO2, HCl
(P)
(a) OH
OH (b) OH
OH
(c) CO2H
OH(d)
COOH
OH23. The major product (P) in the following reaction is
NH
(i) nBuLi(ii) TBDMS-Cl(iii) NBS/THF(iv) n-BuLi(v) CO2, H+
(P)
(a) N
Br
COOH
TBDMS
(b) N
COOH
Br
TBDMS
(c) N COOH
TBDMS
(d) N
TBDMS
COOH
24. Which of the following molecules are not optically active?
NBr CH3
CH3
BrCO2H
H3C CO2H Br
H
HO
H
CO2H
H
HO2C
H
OH
OHH
H3C CH3
CH3
(A)(B) (C) (D)
(a) A, B (b) B, C (c) C, D (d) D, A
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25. Correct configurations of stereo centres for the given molecules A and B respectively, will be.
O O
A B
1
2
1
2
(a) 1S, 2R and 1R, 2S (b) 1R, 2S and 1S, 2R (c) 1R, 2R and 1S, 2S (d) 1S, 2R and 1S, 2S26. Number of signals expected in proton decoupled 13C NMR spectrum of 1, 4-dihydroxynapthalene and 1, 8-
dihydroxynaphthalene are(a) 5 and 5 (b) 5 and 6 (c) 5 and 10 (d) 10 and 6
27. Among the following compounds the one that readily undergoes decarboxylation upon heating is
(a)
COOHO
(b) O
COOH
(c) O
COOH
(d) O
HOOC
28. What is the max for the following compound?
Given : transoid base value = 214 nm: cisoid base value = 253 nm: alkyl group on base = + 5 nm: exocyclic C C = + 5 nm: extended conjuation = + 30 nm
(a) 234 nm (b) 244 nm (c) 273 nm (d) 283 nm
29. Stereotopological relation between Ha and Hb in given molecules respectively.
Ha
Hb
Ha
Hb
Ha
Hb
X Y Z(a) Enantiotopic, Diastereotopic and identical (b) Identical, Enantiotopic and Diastereotopic(c) Enantiotopic, Identical and Diastereotopic (d) Diastereotopic , enantiotopic and identical
30. What will be the relation between two molecules given belowCOOH
CH3
H3C
COOH
H
H
H
H
(a) Conformational diastereomers (b) Configurational enantiomers(c) Configurational Identical (d) Conformational enantiomers
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PART-C
31.
CO2Me
HO2C
MeH
(i) (COCl)2, CH2Cl2or SOCl2/CH2Cl2
(ii) CH2N2/THF(iii) Ag//THF/H2O(iv) aq. NaOH
(A)
What is the major product (A)?
(a)
CO2Me
MeH
HOOC (b)
CO2Me
MeH
MeOOC
(c)
CO2Me
MeH
HOOC (d)
CO2H
MeH
MeOOC
32.
O •
•
CO
OMeMeO /NaH
(ii) MeI/K2CO3(A)
What is the major product (A)
(a)
O
MeMe
•
•Me
MeO2C
(b)
O
MeO2C
Me
•
•
(c)
MeO
MeO2C
•
•(d)
MeOOCO
Me
•
•
33.N
CO2But
CH2Phm-CPBA (A)
NC
H
m-CPBA (B)Ph
O
What is the major product (A) and (B)
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(a)
NCO2But
CH2PhNHCOPh
A =
O
B =
O
(b) NHCO2But NHCOPh
A =
O
B =
O
(c) N
CO2But
CH2PhNHCOPh
A =
O
B =
O
(d) N
CO2But
BnNHCOPh
A =
O
B =
O
34.
O
MgBr(i) /CuBr
(ii) PhSeBr
(iii) H2O2
(A)
The major product?
(a)
OSePh
(b)
O
(c)
OSePh
(d)
OSePh
35.N
CHO
O R
(i) Ph3P CH COOMe
(ii) Toluene/Reflux ()(A)
The major product (A)?
(a) N
COOMe
O R
(b) N
COOMe
O R
(c) N
COOMe
O R
(d) N
COOH
O R
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36.
MeO
O
(i) H2O2/AcOH
(ii) NaOH/H2O(iii) BH3SMe2
(A)
The major product ?
(a) MeO
OHOH
(b) HO
OHOH
(c) MeO
OH COOH
(d) HO
OH OH
37.
O
(i) KCN (2 eq)/DMF
(ii)HO OH /TsOH(cat.)
(iii) KOH/H2O
(iv) CH2N2(excess)
(A)
The major product ?
(a)
O
HOOC COOH
(b)
HOOC COOH
OO
(c) MeOOC COOMe
O
(d)
MeOOC COOMe
OO
38.
MeO
CN
(i) LDA(ii) cyclopentenone(iii) Me–I
(A)
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(a) MeO
CNMe
O
(b) MeO
CN
O
Me
(c)
MeO
CN Me
O (d)
HO
CN Me
O
39. The most stable conformation for the compound (X) is
O O
H R
where, R = –F, –NO2, S
O
Me, –NMe3
(a) OO
H
R (b) OO
R
H (c) OO
H
R (d)
OO
H
R
40. The major product formed in the reaction given below is
O2N OMe
Me
OH
HO
conc. H2SO4
(a)
OO2N OMe
Me
(b)
OMeO NO2
Me
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(c)
OMe NO2
OMe
(d)
OMe NO2
Me
MeO
41. Among the following substrate the fastest SN2 substitution occurs via NaI in acetone.
(a)
Br
(b)
Br
O
(c)
Br
(d)
O
Br
42.
BrH3C
H
OH
H3C
H
HBr(P)
(O.A.)
The major product (P) in the above synthetic transformation is
(a)
Br
H3CH
Br
H3C H(O.A)
(b)
Br
H CH3
Br
H CH3
(O.A)
(c)
Br
H3C H
Br
H3C H (d)
Br
H H
Br
H3C CH3
(Meso)
43. Arrange the rate of acetolysis of following compounds (Ar = P–NO2C6H4)
(A)
H OCOAr
(B)
H OCOAr
(C)
ArOCO H
(D)
H OCOAr
(a) A > B > C > D (b) A > C > B > D (c) C > A > B > D (d) D > C > B > A44. The major product (P) formed in the following reaction sequence is
CHO
H OH
H OH
CH2OH
H OH
(i) Br2/H2O
(ii) Ca(OH)2
Fe(OAc)3
30ºC, H2O2(P)
D-ribose
(a) D-erythrose (b) D-threose (c) D-xylose (d) D-lyxose
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45. A tripeptide gives the following amino acids on Edmann degradation
HN
NS O
Ph
SMe
+H2N
HN
O
OH
O
The tripeptide is :(a) met–val-gly (b) met-gly-val (d) val-gly-met (d) gly-val-met
46. The major product (P) formed in the following reaction sequence is
OH
O
H3C
NH2
(i) Cbz–Cl, NaOH
(ii) OH , H+
(iii) Na/EtOH
(P)
(iv) NaH/MEM-Cl
(a) OMEM
H3C
NHCbz(b) O
H3C
NHMEM
O
Cbz
(c) NHCbz O
OMEM
(d) none of these
47. The major product (P) formed in the following reaction is
Ph
Ph
hv(P)
(a)
Ph
Ph
(b) Ph
Ph
(c) Ph
Ph
(d) PhPh
48. Which among the following compound(s) has/have permannent dipole moment:
(I) (II) (III) (IV)
(a) I, II and III (b) I, II (c) III only (d) IV only
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49. The major product (P) formed in the following reaction sequence is
OH OH OH
CHO
OH OH
D-mannose
(i) NaBH4
(ii) Acetone, ZnCl2(iii) NaIO4
(P)
(a) O O
CHO
(b) O O
CHO
(c) O O
CHO
(d) O O
CHO
50. The major product (P) formed in the following reaction sequence is
N O
OO
Me Ph
(i) NaHMDS
(ii)I
(iii) LiAlH4
(iv) t-BuMe2SiCl
(P)
(a) OSiMe2t-Bu
(b) OSiMe2t-Bu
(c) N
OSiMe2t-BuO
Me Ph
(d) N O
OSiMe2t-BuO
Me Ph
51. The major product (P) isCH2 NMe2
(i) I SiMe3
(ii) CsF, HMDA, DBUroom temperature
(P)
(a)
CH3
NMe2
(b)
CH3
NMe2
(c)
CH2
SiMe3
NMe2
(d)
CH2
CH2
NMe2
I
52. The major product (P) formed in the following reaction sequence is
Cl2HC COClEt3N
PhN CHPh(P)
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(a) NPh
PhCl
Cl
O
(b) NPh
PhO
Cl
Cl
(c)
O NPh
Ph
Cl
Cl
(d)
O
NPh
Ph
Cl
Cl
53. The major proudct (P) formed in the following reaction sequence is:Me
SPhMe
CH2I2
Et2ZnPh, 55ºC
(P)
(a)
Me
SPhMe (b)
Me
SPhMe
(c)
Me
Me
SPh
(d)
Me
Me
SPh
54. The major product (P) formed in the following reaction is
PhOOC
OH
Me
+O
EtO OEt
EtCOOH
(P)
(a)
PhOOC
O
O
Me
H(b)
PhOOC
O
O
Me
H
(c)
PhOOC
O
O
Me
H(d)
PhOOC
O
Me
HO
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55. The major product (P) formed in the following reaction is
SiMe3
SiMe3
Me
Me
TBAFMeCN, 50ºC
CO2Me
MeO2C(P)
(a)
Me
Me
CO2Me
CO2Me
(b)
Me
Me
CO2Me
CO2Me
(c)
Me
Me
CO2Me
CO2Me(d)
Me
Me
CO2Me
CO2Me
56. The major product (P) and the mechanism involved in the following reaction sequence is
N
ClNaNH2 (P)
(a) N NH2
; elimination-addition mechanism
(b) N
NH2
; elimination addition mechanism
(c) N NH2
; addition-elimination mechanism
(d) N
NH2
; addition-elimination mechanism
57. Calculate the composition of enantiomeric mixture of 2-butanol having specific rotation +6.76°. Given thatspecific rotation of (S)(+) -2-butanol is 13.52°.(a) 75% (R) and 25% (S) (b) 25% (R) and 75% (S)(c) 67% (R) and 33% (S) (d) 33% (R) and 67% (S)
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58. An organic compound (A) does not show absorption in the 1600–1800 cm–1 range but shows strong absorptionat 1070 cm–1. Its 1H NMR spectrum has two multiplets in the ratio of 1 : 1 at 1.8 and 3.7 . The structureof the compound (A) is:
(a) HOOH (b) HO
OH
(c) O
(d) O
59. In the mass spectrum of C6H4Cl2, the ratio of peaks at mass values 84, 86 and 88 will respectively be
(a) 4 : 2 : 1 (b) 9 : 6 : 3 (c) 9 : 6 : 1 (d) 8 : 4 : 1
60. The C O stretching vibration are 1815, 1745, 1780 and 1715 cm–1 for the following molecules
O O
O
O
(I) (II) (III) (IV)The C O stretching for each molecule is(a) 1815, 1745, 1780 and 1715 respectively (b) 1815, 1780, 1745 and 1715 respectively(c) 1715, 1745, 1780 and 1815 respectively (d) 1715, 1780, 1745 and 1815 respectively.
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CHEMICAL SCIENCESTEST SERIES-3ANSWER KEY
PART-A
1. (a) 2. (d) 3. (c) 4. (c) 5. (d) 6. (c) 7. (c)8. (b) 9. (a) 10. (a)
PART-B11. (b) 12. (a) 13. (c) 14. (c) 15. (b) 16. (a) 17. (a)18. (d) 19. (b) 20. (b) 21. (b) 22. (a) 23. (d) 24. (b)25. (a) 26. (b) 27. (c) 28. (d) 29. (b) 30. (b)
PART-C31. (a) 32. (b) 33. (a) 34. (b) 35. (a) 36. (a) 37. (d)38. (c) 39. (b) 40. (a) 41. (d) 42. (c) 43. (b) 44. (a)45. (a) 46. (a) 47. (a) 48. (c) 49. (a) 50. (b) 51. (b)52. (a) 53. (c) 54. (c) 55. (b) 56. (b) 57. (b) 58. (d)59. (c) 60. (b)
Date : 05-12-2015