chemistry test series iv
TRANSCRIPT
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Part-A
1. What is the remainder when 163+ 173+ 183+ 193 is divided by 70?
(a) 0 (b) 1 (c) 69 (d) None of these
2. What is the remainder when 1527+ 2327is divided by 19?
(a) 12 (b) 5 (c) 0 (d) 1
3. Begin write positive integers (in decimal notation) sequenctly what is the 1000th digit written?
(a) 0 (b) 1 (c) 6 (d) None of these
4. A king ordered that a golden crown be made from him from 8kg of gold and 2kg of silver. The goldsmithtook away some amount of gold and replaced it by an equal amount of silver and the crown when made,weighed 10 kg. The king knew that under water gold lost 1/20thof its weight while silver lost 1/10th. Whencrown was weighed under water, it was 9.25 kg. How much gold was stolen by the goldsmith
(a) 0.5kg (b) 1kg (c) 2kg (d) 3kg
5. There are two candles of equal length and of different thickness. The thicker one lasts for 6 hours. Thethinner one lasts two hour less than the thicker one. Radha lights the two candles at the same time whenshe went to bed, she saw the thicker one is twice the length of the thinner one. How long ago did Radhalight the two candles?
(a) 1 hour (b) 2 hours (c) 3 hours (d) 4 hours
6. Rishabh and Richa solved a quadratic equation. In solving it, Rishabh made a mistake in the constant termand got the roots as 6 and 2. While Richa made a mistake in the coefficient ofxonly and obtained theroots as 7 and 1. The correct roots are
(a) 6, 7 (b) 6, 1 (c) 7, 1 (d) 2, 7
7. Manufacturer of a tennis ball anounced that their new ball is best in the market. If one were drop it fromany height, it would only rise to the extent of 10% of the height from which it was dropped. If the ball wasdropped 45 feet, how much would the ball travel before coming to rest.
(a) 45 ft (b) 50 ft (c) 55 ft (d) 49.5 ft
8. From a leaking tab a drop come out in b minutes. If there are c drops in a liter, then in how manyhours one liter of water will be wasted
(a) 60 a/bc (b) a/bc (c) abc/60 (d) bc/60a
9. Fresh grapes contain 68% water and dry grapes contain 20% water. How much fresh grapes are requiredto obtained 80kg of dry grapes
(a) 100 kg (b) 200 kg (c) 300 kg (d) 400 kg
10. The value of54log16
(a) 16 (b) 5 (c) 25 (d) 4
11. Given that ( ) | | /f y y y and qis an non-zero real number. The value of | ( ) ( ) |f q f q is
(a) 0 (b) 1 (c) 1 (d) 2
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Part-B
21. Which molecule is inactive for rotational spectrum?(a) SF
4(b) BrF
3(c) Ozone (d) Tetrachloroethylene
22. The ESR spectrum of methoxymethyl radical will appear as(a) A triplet of quartets (b) A triplet of quentets(c) A quartet of quartets (d) A doublet of quartets
23. The point group of the given molecules (consider them rigid in lowest energy conformation)
Bicyclo[1.1.1]pentane
AB
(a) C3v and C
2v respectively (b) D
3h and D
2h respectively
(c) D3d and D
2d respectively (d) C
3h and C
2h respectively
24. Suppose we put a delta function bump in the centre of infinite square well
1 aH x2
where is constant
Then first order correction to the second excited state is:
(a) 0 (b)2
a(c)
2
a
(d)
a
225. The standard entropy of the molecules CH
2Cl
2(g), CHCl
3(g) and CH
3Cl(g) is in increasing order is
(a)0 0 0CH Cl CHCl CH Cl2 2 3 3
S S S (b) 0 0 0CH Cl CH Cl CHCl2 2 3 3S S S
(c)
0 0 0
CH Cl CH Cl CHCl3 2 2 3
S S S (d)
0 0 0
CH Cl CH Cl CHCl3 2 2 3
S S S
26. The molar enthalpy of combustion of isobutane and n butane are 2869 kJ/mole and 2877 kJ/mole respec-
tively at 298K and 1atm. The H for conversion of 1 mole of n butane to one mole of isobutane
(a)8kJ
mole (b)
8kJ
mole
(c)
2877kJ
mole
(d)
2869kJ
mole
27. For CH3I molecule the moment of inertia xx yy zzI , I , I are related by
(a) xx yy zzI I I (b) xx yy zzI I I (c) xx yy zzI I I (d) xx yy zzI I I
28. The minimum potential difference needed to reduce Al2O3at 500C. The free energy for the decompositionreaction
2 3 2
2 4Al O Al O G 965 kJ
3 3
is(a) 2.5 (b) 3.3 (c) 1.6 (d) 4.3
29. In metal carbonyls, the metal and CO orbitals which overlap one another to form a -bond are respectively
(a) andd (b) andnb nb (c) d p (d)*andd
30. Which of the following complexes has higher value of CFSE excluding pairing energy?(a)
3
2 6Mn H O
(b)
3
2 6Co H O
(c)
2
2 6Ni H O
(d)
3
6Fe CN
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31. Arrange the following ligands in the increasing order of acceptor ability?(a) Phen < CO < R
3P < CN< NO (b) Phen < NO < R
3P < CN< CO
(c) Phen < R3P < CN< CO < NO (d) R
3P < Phen < CN< CO < NO
32. Which of the following complexes is the strongest reducing agent?
(a) 2
3 4Cu NH
(b)
2
3 6Co NH
(c)
4
6Co CN
(d)
3
2 6Co H O
33. Which of the following peptides is formed when Ala-Ser-Thr-Lys-Gly-Arg-Gly is treated with trypsin?(a) Ala-Ser-Thr-Lys (b) Ala-Ser-Thr (c) Arg-Ser-Gly-Ala (d) Ala-Ser-Thr-Lys-Gly
34. The enzyme nitrogenase catalyze the activation and reduction of dinotrogen to ammonia, the nitrogenase arecomposed of two metalloproproteins which are commonly referred to as the Fe protein and the MFe (M =Mo, V and Fe) co-factor. The Fe-protein commonly in the nitrogenase is(a) Fe
2S
2(b) Fe
4S
4(c) dimer of Fe
4S
4(d) Fe
3S
4
35. The blue-colour of copper blue protein is caused by(a) LMCT (b) MLCT (c) d-d transition (d) MM charge transfer
36. Which one of the following amino acids liberates ammonia on mild hydrolysis and then yields a different aminoacid(a) Tyrosine (b) Alanine (c) Asparagine (d) Hydroxyproline
37.OH
COOH
NH2
NaOH
cbz-Cl (A)Imidazole
TBDMS-Cl(B)
(i) LiAlH4
(ii)
O, H+
(C)
The major product C in the above reaction sequence is
(a)
NHCbz
OTBDMSOO
(b)
OCbz OTBDMS
NHTHP
(c)
TBDMSO OTHP
NHCbz
(d)
OTHP OTHP
NHTBMS
38.
NPh
Ph
Ph
MeOOC
OH
O
HCOOH
THF/H2O(A)
H2/Pdc (B)
The major product B in the above synthetic transformation is:
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(a) MeOOC
NH2
OH
(b)
HN
Ph
Ph
MeOOC
OH
HO
(c) MeOOC
NH2
OH
(d) MeOOC
NH2
OH
39. The correct relation between compound (A) and (B) are
HO
OH
OH
H
O O
H
OH
OH
OH
(A) (B)
(a) Identical (b) diastereomers (c) enantiomers (d) Homomers40. The major product P in the following reaction is
(OC)5W
Ph
OMe
BBr3P
(a) (OC)4(Br3B)WPh
OMe
(b) (OC)4WPh
BBr2
(c) (OC)5W C Ph
Br
(d) (OC)4(Br)W Ph41. Which of the following sandwich compound is diamagnetic in their ground state.
(a) Cp2V (b) Cp
2Cr (c) Cp
2Mn (d) Cp
2Fe
42.
O
hv
O
The above reaction takes place via(a) Norish type-I (b) Peterno bucchi (c) Norish type-II (d) di-pi methane rearrangement
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43.
ClBr
Ag+, H2OP
The major product P is:
(a)
OH
Cl
(b)
Br
(c)
Br
OH
(d)
Cl
OH
44.
Me
Et
A
170C
P
The product P is
(a)
Me Et
(b)
Me Et
(c) both (a) and (b) (d)
Et Me
45. Which of the following compound is aromatic
(a) (b) (c) (d)
46.
O
O
(i) PhMgBr
(ii) H+P
The major product P in the following reaction is
(a)
Ph
O
(b)
Ph
OH
(c)
Ph
O
(d)
Ph
O
47. When a mixture of acetaldehyde and excess HCHO is heated with alkali which of the following product isproduced
(a) H3C CH2 OH (b) CHO (c) C(CH2OH)4 (d) (H3C)2C CH2 OH
H
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58. Consider the equilibrium, 3A B 2C D
At equilibrium, the concentrations of A, B and C were observed 0.03, 0.01 and 0.006 molelitre1respectively.The initial concentration of A would have been(a) 0.003 (b) 0.001 (c) 0.009 (d) 0.039
59.
Cl
Cl ClI II III
Above molecules undergo reaction in the presence of base. Rate of reaction follows the order(a) I > II > III (b) III > II > I (c) II > III > I (d) II > I > III
60. C
CH3
H3C OH
Et
BF3
NaCN*
(a)C
CH3
H3C CN
Et
* (b)C
CH3
H3C
NCEt*
(c) both (a) and (b) (d) None of the above
61.
H
EtH3C
Ph
Cl
Et H
D
*
NH2/
(a)
Et
H3C Ph
CH(CH3)(Et)
*
(b)H3C
Et Ph
CH(CH3)(Et)*
(c)Et
D Ph
CH(CH3)(Et)*
(d)D
Et Ph
CH(CH3)(Et)*
62.
O
KH/H2O
O
H
(a)
O OH
(b)
O
CH3HO
(c)
O
Me
OH
(d)
O
HO Me
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63.
O
D Ph
H2SO4
(a)
OH
D
Ph
(b)
OH
Ph
(c)
OH
D
Ph(d)
OH
H
Ph
64. Which of following ion has highest magnetic moment?
(a) 3Er (b) 3Ho (c)3Tb (d) 3Eu
65. Volume of water needed to mix 10 ml, 10N HNO3to get 0.1 N HNO
3?
(a) 990 ml (b) 1020 ml (c) 1010 ml (d) 100066. The increasing order of acidic strength of following acids
HNO3, HBr, H
2SO
4, HCl, HClO
4in water
(a) 4 2 4 3HClO HBr H SO HCl HNO (b) 3 4 2 4HNO HCl HClO H SO HBr
(c) 4 2 4 3HClO H SO HBr HCl HNO (d) None of the above
67. If fundamental vibrational frequency of F2is 2.6761013Hz, find out the vibrational partition function for F
2at
25C(a) 2.31 (b) 1.03 (c) 3.01 (d) 3.21
68. Consider the followingList-I List-II
Order of reaction Half life time
(A) 2 (i)0.693
k
(B) 1 (ii)a
2k
(C) 3 (iii)1
ak
(D) 0 (iv) 23
2a k
The correct match of the half lives with the order of reaction will be(a) A-(iii), B-(iv), C-(i), D-(ii) (b) A-(iii), B-(i), C-(iv), D-(ii)(c) A-(iv), B-(i), C-(ii), D-(iii) (d) A-(iv), B-(i), C-(iii), D-(ii)
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69. For the reaction P Q R S , experimental data for the measured initial rates is given below..
15
4
3
5
Initial rateInitial conc. P Initial conc. Q Initial conc. RExpt.
M M M Ms
1 0.2 0.5 0.4 8.0 10
2 0.4 0.5 0.4 3.2 10
3 0.4 2.0 0.4 1.28 10
4 0.1 0.25 1.6 4.0 10
The order of the reaction with respect to P, Q and R respectively is:(a) 2 2, 1 (b) 2, 1, 2 (c) 2, 1, 1 (d) 1, 1, 2
70. In an NMR experiment, the relative population difference N/N for 13C nuclei in the magnetic fields of (a)0.5 T, (b) 2.5 T and (c) 15.0T at a temperature of 298K are in the ratio:(a) 1 : 5 : 30 (b) e1: e5: e30
(c) e0.5/298: e2.5/298: e15/298 (d) 30 : 5 : 1
Part-C
71. Treatment of the unsaturated acid A with the reagents shown gives an unstable compound B which is convertedinto stable compound C by treatment with base. The spectral data for compound C are as follows: IR: 1775,1645 cm-1; H NMR: 4.18 (2H, s), 5.00 (2H, s), 6.18 (1H, s).
What are the structures of B and C?
Me
MeCO2H
Br2
(PhCO2)2A
C5H6Br2O2
B
baseC5H5BrO2
C
(a)
Br
Br COOH
O
O
Br
And (b)
Br
COOH
O
O
Br
And
(c)
Br
COOHO
OBr
And
Br
Br (d)
Br
COOHO
O
And
72. A compound used as a moth repellant has three molecular ion peaks at m/z =146 (100%), 148 (65%) & 150(10%) amu in its mass spectrum. A pair of smaller peaks are seen at m/z=111 (34%) & 113 (11%). Theinfrared spectrum shows sharp absorption just above 3000 cm-1region, and also at 1480 cm-1. The 1H nmr
shows a single sharp signal at = 7.2 ppm, and the 13C nmr has two signals ( =133 & 130 ppm ).
(a)
F
F
F
CH3
(b)
F
(c)
Cl
Cl
(d)
Cl
Cl
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73. Which is the incorrect irreducible representation for D3h
point group?
3h 3 2 h 3 vD E 2C 3C 2S 3
a 1 1 1 1 1 1
b 2 1 0 2 1 0
c 1 1 1 1 1 1
d 2 1 0 2 1 0
74. The Mullikan symbols for the correct irreducible representations in Q.73 are
(a) 1 2A' , A ' and E' respectively (b) 2 1A ' , E" and A ' respectively
(c) 2 1A ' , E ' and A" respectively (d) 1E ', A " and E "respectively
75. The activity of liquid water at 9.3 bar pressure and TR is
[Given R = 0.083 litre bar/k-mole, TR= room temperature]
(a) 18/TRe (b) 18/TRe (c) 1.8/TRe (d) 1.8/TRe
76. The wavefunction corresponding to energy = 0.618 of Butadiene. According to the Huckel orbital theory
is(a) 1 2 3 40.3717 2pz 0.6015 2pz 0.6015 2pz 0.317 2pz
(b) 1 2 3 40.6015 2pz 0.3717 2pz 0.3717 2pz 0.6015 2pz
(c) 1 2 3 40.6015 2pz 0.3717 2pz 0.3717 2pz 0.6015 2 pz
(d) 1 2 3 40.3717 2pz 0.6015 2pz 0.6015 2pz 0.3717 2pz
77. The value commutator [H, x] for the quantum mechanical hamiltonian 2p
H V x is2m
dxx '
dt
(a)
x '
i
(b)
4 x '
i
(c)
2 x '
i
(d)
x '
2i
78. An electron of energy 1 eV is moving along the x-axis where it encounters a 0.2 nm long region. Providing apotential of 4.8 eV. The potential is zero everywhere else. The probability that the electron will go through this
region of higher potential is: (Given that for electron2
3 238 10 eV nm2m
(a) e1 (b) e2 (c) e3 (d) e4
79. The frequencies of the first few vibronic transition to an excited electronic states are
Vibronic transition 1obs / cm
0 0 39699.10 cm1
0 1 40786.8 cm1
0 2 41858.9 cm1
The value of e is
(a) 1103.3 cm1 (b) 2103.3 cm1 (b) 2206.6 cm1 (d) 4206.6 cm1
80. The EMF of concentration cell without EMF is
4 4 1 4 2 4Cd | CdSO s | PbSO a | Pb | PbSO a | CdSO s | Cd
(a) 1
2
aRTE lnF a
(b) 2
1
aRT lnF a
(c) 1
2
a2RT lnF a
(d) 2
1
a2RT lnF a
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81. The electron transfer reaction in the following reaction takes place via
2 3 2 2
3 2 2 25 6 56Co NH Fe CN H O Co H O Fe CN H O
(a) Inner sphere mechanism (b) Inner sphere mechanism without ligand transfor(c) Outer sphere mechanism (d) Either inner sphere or outer sphere mechanism
82. Which of the following substances show substaintal Jahn Teller distortion
(a) 2 2
2 2 26 6Cr H O , Cu H O , MnF
(b) 2 2
2 2 26 6Cr H O , Cu H O , CrF
(c) 2 2 2
2 2 26 6 6Mn H O , Cr H O , Cu H O
(d) 2 2 2
2 2 26 6 6Ni H O , Cr H O , Cu H O
83. Which of the following pairs of complexes shows labile and inert complexes respectively
(a) 3 2
2 26 6Co H O and Cu H O
(b) 3 3
2 26 6Cr H O and Co H O
(c) 2 3
2 26 6Co H O and Co H O
(d)
3 2
2 26 6Ti H O and Cr H O
84. Lowest energy transition for 3
6CrF
is
(a) 3 32g 2gT A (b)3 3
2g 1gT T (c)4 4
2g 1gA T (d)4 4
2g 2gT A
85. Consider the following statement about carbohydrates(1) Br
2/H
2O can be used to differentiate from a ketone
(2) All monosaccharides, whether aldose or ketose are reducing sugars(3) Osazone formation destroys the configuration about C2 of an aldose, but does not affect the configuration
of the rest molecules.(4) A pair of diastereomeric aldose with differ only in configuration about C2 is termed as pair of anomers.Which of the above statements are correct(a) 1, 3 and 4 (b) 2 and 4 (c) 1 and 4 (d) 1, 2 and 3
86. Which of the following statements about hemoglobin is not true(a) There is a H-bonding between an imidazole NH of a histidine and bound O
2group.
(b) In the deoxy form, the Fe(II) atom is in the high spin state and less about 0.5 out of the heme plane in thedirection of the histidine group.
(c) The dioxygen unit is bound in a bent fashion similar to the2
superoxo type.(d) Hemoglobin an 2 2 heterotetramer that binds O2co-operatively, is found in red blood cells.
87.HO CH2 (CH2)4
O
H Br2/H2O(A)
HIO4(B)
The major product B in the above reaction sequence is
(a) 3HCHO 3HCOOH CH COOH (b) 23HCHO 2HCOOH CO
(c) HCHO 3HCOOH OHC COOH (d) 4HCOOH OHC COOH
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88. Ph N
O
O
O
1. NaHMDS
or LDA
SPh
O O
N
O
Ph
3. LiOH/H2O2
2.
(P)
The major product P in the above reaction is
(a) Ph OH
O
NH2
(b) Ph OH
O
OH
(c)
Ph OH
O
NO PhS
O
O
Ph
(d) Ph OH
O
OH
89.
HO
HO
N
NHI
O
O
CO2Me
cat. Pd(OAc)2Ph3P, Et3Ndioxane, 85C, 3h
(P)LiAlH478C
Q
The major product in the above reactions
(a)
HO
HO
N
NH
O
O
HO
(b)
HO
HO
N
NH
O
O
HO
(c)
O
O
N
NHI
O
O
H3C
H3C
(d)
O
O
N
NHI
O
H3
C
H3C
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90. Consider the potential energy diagram for reaction about the C(2)C
(3)bond in n-butane
0.6 kcal/mole
b
a c
d
e
3.4
f
6.9 kcal/mole
0 60 120 180 240 300 360
P.E.
Torsion angle (degrees)
The energy difference between partically eclipsed and skew conformation in kcal/mole is(a) 2.8 (b) 2.9 (c) 3 (d) 5.4
91. When Fe(CO)5is refluxed with cyclopentadiene compound (A) is formed which has the empirical formula
C8H
6O
3Fe and complicated 1H NMR spectrum has been observed. The compound A readily loses CO to
give compound B with two 1H NMR spectrum, one at negative chemical shift and one at around 5ppm,
subsequent heating of B results in the loss of H2and the formation of a new compound C. Compound C hassingle 1H NMR resonance and the empirical formula C
7H
5O
2Fe compound A C obeys the 18 electron
rule.Consider the above statements and data, which of the following statement is/are true about the compounds
A C
(a) Compound A has Cp in 3 -mode and no MH bond
(b) Compound B has Cp in 3 mode and having MH bond.
(c) Compound C has two MM bond and two Cp in 5 mode.
(d) Compound A has Cp in 3 mode and having MH bond.
92. The major product P in the given reaction is CF INa Hg 32 8Co CO O P
(a) 34Co CO CF (b) 35Co CO CF
(c) 4Co CO F (d) 4Co CO I
93. O
CH3
hvP
The major product P is:
(a) OH (b)O
(c)O
(d)OH
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94. + Cl2HC C
O
Cl(i) Et3N,
(ii) Zn/CH3COOHP
The product P is
(a)
Cl Cl
O
(b) O (c)
O
Cl
(d)
O
ClCl
95.O
(i) MeLI
(ii) PCCP
The major product P is
(a)
Me
O
(b)
O
Me
(c)
O
Me
(d) No reaction
96. The major product formed in the following reaction sequence is
1. m-CPBA
2. BF3.Et2OP
(a)
OH
(b)
OH
(c)
O
(d)
O
97. , unsaturated curboxlic acid X with I2and NaHCO
3gives
O
OH
X
(a)
O
I
(b)
I
O
O
(c)
I
O
O
(d)
O
O
I
98. The oxidising power of per halates follows the order
(a) 4 4 4ClO BrO IO (b) 4 4 4ClO BrO IO
(c) 4 4 4ClO BrO IO (d) 4 4 4ClO IO BrO
99. Which one of the following bonds pattern is present in silicones
(a) Si O Si O Si (b) Si C Si C Si C (c) Si C Si O Si (d) Si Si Si Si
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100. The first ionization potential in electron volts of nitrogen and oxygen atom are respectively given by(a) 14.6, 13.6 (b) 13.6, 14.6 (c) 13.6, 13.6 (d) 14.6, 14.6
101. In a sample of pitchblende the ratio of 206 238Pb : U 0.3 :1 by weight. If the distintegration constant of U238is1.331010per year and all Pb is supposed to be originated from uranium, the age of the mineral would be
(a) 91.35 10 yrs (b) 94.12 10 yrs (c) 92.24 10 yrs (d) 96.14 10 yrs
102. When X-rays from a palladium target having a wavelength of 58.1 pm are used, the (200) reflection of sodiumchloride occurs at an angle of 6.80. The density of sodium chloride is (Given: sin 6.80 ]= 0.1184)(a) 3.999 g cm3 (b) 3.288 gcm3 (c) 3.999103kg cm3 (d) 3.288103kg m3
103. Consider a polymer sample with
Number of molecules Mass
10 1000
50 2000
40 5000
The polydispersity index (P.D.I) of the sample is
(a)3121 10
31 (b)
331 10121
(c)1210
961(d) None of these
104. In langmuir adsorption of a gas onto a solid surface the values of slope and intercept were found to be 40 pacm3and 4 cm3respectively. The value of distribution coefficient is:(a) 0.5 Pascal (b) 0.1 Pascal (c) 0.5 Pascal1 (d) 0.1 Pascal1
105. The decomposit ion of PCl5into PCl
3and chlorine gas can be represented by the equilibrium
5 3 2PCl g PCl g Cl g
For this equilibrium, the value of the equilibrium constant Kp was found to be Kp = 0.404. If the total pressure
at equilibrium was found to be 3.0 atm, the volume per cent of chlorine at equilibrium will be(a) 25.5% (b) 33.3% (c) 45% (d) 47%
106. The degree of dissociation of acetic acid in a 0.1 M solution is 1.11102. The Ka value of the acid is(a) 1.2459105 (b) 3.2459105 (c) 12.459105 (d) 5.2459105.
107.
OTs
OH
EtH
H3C CH3
NaN3
(a)
H
Et
CH3
HO
H3C N3
(b)
CH3
Et
CH3
HO
H N3
(c)
H
CH3
Et
HO
H3C N3
(d)
CH3
CH3
Et
HO
H N3
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108.
O
OEt
+NO2
(i) NaOEt
(ii) Zn/AcOHIntermediate
[I]P
I and P are
(a)
O
OEt
and
O
OEt
NH2
(b) N
O
O
and
O
NH2
(c)
O
OEt
and
O
OEt
NH2
(d) N
O
O
and
O
OEt
NH2
109.
OTs
O
NH2NH2
P-TsOH(A) (B)KOH
A and B are
(a)
OTs
NNH2
and
(b)
NNH2
O
andO
(c)
OTs
NNH2
and
OTs
(d)
NNH2
O
and
O
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110. H
O
CH3
O
PhEtO P
O
OEt
CH2 CF3
NaH
(a)H
CH3
HF3C
Ph
CF3H(b)
H
CH3
HF3C
Ph
O
(c) H
O
CH3
Ph
HF3C(d)
H
CH3
Ph
HF3C
CF3H
111.
O
+
O
HPhKH
(a)
O H
CH3
and Ph
OH
CH3
O
ReRe
(b)
O H
CH3
and Ph
OH
CH3
O
ReSi
(c)
O CH3
H
and Ph
OH
CH3
O
ReRe
(d)
O CH3
H
andPh
OH
CH3
O
ReSi
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112.conc. HNO3
Conc. H2SO4
(a)
NO2
(b)
NO2
(c)NO2
(d)
NO2
113. Ion exchange methods which of following pair undergo elution first?
(a) 3 3Ce , Pr (b) 3 3Sm , Gd (c) 3 3Lu , Tm (d) 3 3Dy , Ho
114. Proton affinity of compounds are given
Proton Affinity 1HOO
PA 1573 kJ mol
2 1PAO 1476 kJ mol 1
CH O3PA 159 kJ mol
The correct order of acidity
(a) 3 2 2 2CH OH H O H O
(b) 2 2 2 3H O H O CH OH (c) on the basis of PA of ions acidic strength can not be determined.
(d) 3 2 2 2CH OH H O H O (since it is an exceptional case)
115. A system consisting of 7 atoms of A and 5 atoms of B. If two identical containers having same system asdescribed, are joined together, the total partition function of the combined system ca be given as
(a)
7 5A B4075q q
7 5(b)
7 5A B4035q q
7 5(c)
7 5A B35 q q
7 5(d)
7 5A B4096q q
7 5
116. For the reversible reaction, k1
k2
X Y
t 0 a 0
t t a x x
the integrated rate law is given by
(I) k k t1 2
2 1t1 2
1X a k k e
k k
(II) k k t1 2
1 2t1 2
1X a k k e
k k
(III) k k t1 2
2 1t
1 2
1X a k k e
k k
(IV) k k t1 2
1 2t
2 1
1X a k k e
k k
(a) I only (b) III only (c) II and IV (d) All are correct.
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117. For the enzyme catalysis, Michaelis-Menten suggested the following, mechanism'1
1
k
kE S ES
"1kES P E
with 2.9102sec1as the rate constant for the product formation, 2.4101sec1as the rate constant forthe dissociation of the enzyme substrate complex into enzyme & substrate and 5.5101mol1ltr sec1as
the rate constant for the formation of the enzyme substrate complex.The value of the Michaelis-Menten constant (in mol ltr1) will be(a) 0.2724 (b) 0.4890 (c) 0.7729 (d) None of these
118. Given that the information that
2 0
0
2 0
Cu 2e Cu E 0.35
Cu e Cu E 0.52
Cu Cl e CuCl E 0.54
The value of Ksp
for CuCl is
(a) 10+6
(b) 106
(c) 1.6107
(d) 1.6107
119. The formula for the standard deviation for a set of small sample of n measurements is
(a)
1N 2
2
ii 1
x
N 1
(b)
1
N 22
ii 1
x x
N 1
(c)
1N 2
ii 1
x
N N 1
(d)
1N 2
2
ii 1
x
N N 1
120. A system consists of gaseous H2, O
2, H
2O and CO
2where the amount of CO
2is specified and the equilibrium
constant for the reaction 2 2 22H g O g 2H O g is known. The number of degrees of freedom ofthe system is
(a) 2 (b) 3 (c) 4 (d) 5
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22
Chemical Sciences Test Series-IV
ANSWER KEY
PART-A
1. (a) 2. (c) 3. (d) 4. (d) 5. (c) 6. (c) 7. (c)
8. (a) 9. (b) 10. (c) 11. (d) 12. (d) 13. (c) 14. (c)
15. (d) 16. (b) 17. (b) 18. (b) 19. (c) 20. (b)
PART-B
21. (d) 22. (a) 23. (b) 24. (c) 25. (c) 26. (b) 27. (b)
28. (a) 29. (d) 30. (b) 31. (c) 32. (c) 33. (a) 34. (c)
35. (a) 36. (c) 37. (c) 38. (c) 39. (c) 40. (d) 41. (d)
42. (a) 43. (c) 44. (c) 45. (b) 46. (a) 47. (c) 48. (d)
49. (b) 50. (b) 51. (b) 52. (b) 53. (d) 54. (d) 55. (c)
56. (b) 57. (d) 58. (d) 59. (c) 60. (c) 61. (b) 62. (d)
63. (a) 64. (b) 65. (a) 66. (d) 67. (b) 68. (b) 69. (c)
70. (a)
PART-C
71. (a) 72. (c) 73. (d) 74. (c) 75. (a) 76. (b) 77. (a)
78. (d) 79. (a) 80. (b) 81. (c) 82. (b) 83. (c) 84. (d)
85. (d) 86. (c) 87. (c) 88. (b) 89. (a) 90. (a) 91. (d)
92. (d) 93. (b) 94. (b) 95. (a) 96. (d) 97. (d) 98. (b)
99. (a) 100. (a) 101. (c) 102. (d) 103. (c) 104. (b) 105. (a)
106. (c) 107. (c) 108. (b) 109. (a) 110. (a) 111. (c) 112. (a)
113. (c) 114. (b) 115. (d) 116. (a) 117. (b) 118. (b) 119. (b)
120. (b)
Date: 07-12-2013