south delhi : 28-a/11, jia sarai, near-iit hauz khas, … · 2016-04-19 · part - a (general...

17
North Delhi : 33-35, Mall Road, G.T.B. Nagar (Opp. Metro Gate No. 3), Delhi-09, Ph: 011-65462244, 65662255 South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, New Delhi-16, Ph : 011-26851008, 26861009 1

Upload: vongoc

Post on 26-Aug-2018

218 views

Category:

Documents


0 download

TRANSCRIPT

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

1

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

2

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

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

3

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

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

4

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.

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

5

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

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

6

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

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

7

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)

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

8

(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

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

9

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)

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

10

(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

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

11

(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

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

12

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

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

13

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)

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

14

(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

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

15

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)

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

16

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.

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

17

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