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CSIR-NET June-2021 1. Seven chairs numbered 1 to 7 are placed around a round table. Starting from chair

number 5, a person keps going around the table anticlockwise. After crossing 41 chairs. The person will(1) 1 (2) 2 (3) 3 (4) 4Correct option –(3)

2. A girl is running at constant speed to catch a bus which is stationary. Before she reaches the bus, the bus leaves and moves with a constant acceleration. Which one of these graphs describes the situation correctly?____ bus ......... girl

(1) (2)

(3) (4)

Correct Option-(2)

3. A moves of a coin is defined as crossing any number of points in a straight line on the 4 × 4 grid (horizontally, vertically or diagonally). What is the least number of moves in which a coin, starting from the indicated position can cover all nine points within the marked square?

(1) four (2) five (3) six (4) sevenCorrect option : (1)

578 Essential Competitive Chemistry

4. Find out the next figure in following sequence?

(1) (2)

(3) (4)

Correct Option : (3)

5. Examine the followings statements :(a) Fat cells normally produce hormone A in proportion to the amount of fat.

Obese individual, howevery, have lower than normal levels of hormone A.(b) Hormone A reduces food intake.Which among the following is a valid inference based on the above statement?(1) Impaired production of hormone A causes obesity(2) Impaired action of hormone A cause obesity

(3) Obesity results into low levels of hormone A(4) Excess food intake causes depletion of hormone A


6. There are nine indentical balls, one of which is heavier than the other eight. What is the least number of weighings, using a two-pan balance, needed for definitely identifying the heavier ball?(1) One (2) Two (3) Three (4) Four


Essential Competitive Chemistry 579

7. In a population of 900, the number of married couples is as much as the number of singles. There are 1q00 twins of which 60 twins are singles. The population has 00 females in all. What is the number of married persons?(1) 325 (2) 600 (3) 250 (4) 300

Correct Option : (b)8. Consider a location on the Earth where the Sun is overhead at noon. Compared to

its shadow at 10.00 a.m. the shadow of a tower of 4.00 p.m. would be(1) twice longer (1) three times longer(3) four times longer (4) eight times longer

Correct Option : (2)9. A, B, C and D are four consecutive points on a circle such that chords AB = BC =

CD = 100 cm. And DA = 20.0 cm. The radius of the circle (in cm) is

(1) (2) (3) (4) Correct Option : (1)10. A dart is randomly thrown at a circular board on which two concentric rings of

radii R and 2R having the same width (width much less than R) are marked. The probability of the dart hitting the smaller ring is(1) twice the probability that it hits the larger ring(2) half of the probability that it hits the larger ring.(3) four times the probability that it hits the larger ting(4) one-fourth the probability that it hits the larger ting.


11. The graph below shows the rainfall and temperature at a place over one week. Which day of the week would feel the most humid?

(1) Monday (2) Wednesday (3) Thursday (4) SaturdayCorrect Option : (4)12. The length of a road is measured repeatedlly by two persons. Person A reports the

length to be 1002 + 2 cm while person B reports the length to be 1001 + 2 cm. It is known from a more reliable method that the length is 1000.1 + 0.5 cm. Which one of the following statements is correct?(1) Measurements made by B are less accurate, but more precise, compared to

those by A(2) Measurements made by A are less accurate, but more precise, compared to

those by B(3) Measurements made by B are more precise and more accurate, compared to

those by A


(4) Measurement made by A are precise and more accurate, compared to those by B.


13.

The trends of two quantities over five years are shown in the graph. Which of the following are valid inferences?

A. The mean values of the quantities are nearly equal.B. The variation in the two quantities are nearly equalC. Quantity 1 varies less over the given period as compared to Quantity 2(1) Only A is true (2) Only B is true(3) A and C are true (4) A and B are trueCorrect Options : (3)

14. A partially filled hour glass has water falling from the upper bowls to the lower bowl. Which of the following statements is correct?(1) The level of water rises in the lower bowl at the same rate as the fall in the

upper bowl(2) The level of water rises in the lowr bowl at the half rate as the fall in the

upper bowl(3) The rate of increase in the volume of water in the lower bowl is the same as

the rate of decrease in the upper bowl(4) The area of top surface of the water column in the same in both bowls at all

times.Correct Option : (3)

15. In a certain cipher language ‘BIKE’ is coded as ‘YFHB’ and ‘CAR’ is coded as ‘ZXO’ then ‘SCOOTER’ can be coded as(1) TAPPIYB (2) PYVVAHJ(3) PZLLQBO (4) JZKKMCO

Correct Option : (3)16. The number of triangle in the figure is


(1) 9 (2) 10 (3) 11 (4) 12Correct Option : (4)

17. A tells B, “I could be visiting you on any day in the next two months and you must give me gold coins of as much total weight in grams as the number of days that would elapse from today”. If gold coins are available in integer gram weights, what is the least number of coins with which B can meet A’s demand on the day?(1) 31 (2) 7 (3) 6 (4) 13Correct Option : (3)

18. The difference, the sum and the product of two integers are in the proportion 1 : 3 : 10. The two integers are :(1) 3, 9 (2) 2, 5 (3) 5, 10 (4) 3, 10Correct Option : (3)

19. The difference between the square of two consecutive integers in 4080236. The sum of the numbers is(1) 16324 (2) 27061 (3) 180236 (4) 408235Correct Option (4)

20. Which among the following diagrams can represent the relationships between offices and buildings?(1) (2)

(3) (4)

Correct Option : (2)21. Choose the correct statements for oxymyoglobin and cytochrome P450 ( state) from

the following:A. Both contain dianion of protoprophyrin-IXB. They have same fifth-ligand bonded to metal centre from the protein backboneC. They contain single active siteD. They contain metal ion in +3 oxidations state(1) A, B & C (2) A, C & D (3) A, B & D (4) B and C only


Correct Option : (2)22. Thy hydrogen atomic orbital given by represents

(1) 2p orbital (2) 3p orbital (3) 3d orbital (4) 4d orbitalCorrect Option : (3)

23. The major product formed in the following reaction is :

(1) (2)

(3) (4)

Correct Option : (2)24. The major product formed in the following reaction is

(1) (2)

(3) (4)

Correct Option : (3)25. The correct match of 13C NMR chemical shift values ( ppm) for pyridine is

(1) C2 : 136 : C3 : 124; C4 : 150 (2) C2 : 124 : C3 : 150; C4 : 136(3) C2 : 150 : C3 : 124; C4 : 136 (4) C2 : 150 : C3 : 136; C4 : 124



26. The value of a physical variable was found to be 196, 198, 194, 199 and 198 in a set of five independent measurements. The average value and the standard deviation would be closest, respectively to(1) 198 and 2 (2) 197 and 4 (3) 197 and 2 (4) 198 and 4

Correct Option : (3)27. The ion having the highest bond order is

(1) NO+ (2) O2+ (3) N2

+ (4) C2+

28. The major product formed in the following reaction is

(1) (2)

(3) (4)

Correct Option : (1)29. The expected number of vco bands in the IF spectra of fac-[Mo(PPh3)3(CO)3] and

trans-[Mo(PPh3)2(CO)4] are respectively.(1) one and one (2) two and two(3) two and one (4) three and oneCorrect Option : 3

30.

The Miller index for the plane as shown in the figure and parallel to the c-axis is(1) 110 (2) 120 (3) 210 (4) 220

Correct Options : (2)31. In IR spectrum, recorded neat, a compound shows a strong and broad band at 330

cm–1. The band becomes sharp and shifts to 3600 cm–1 when the spectrum is recorded in CCl4 at high dilution. This proves that the compounds has(1) OH group, which is involved in intramolecular H-bonding


(2) OH group, which is involved in intermolecular H-bonding(3) a terminal alkyne group(4) OH group, present in severely sterically hindered environment.

Correct Option : (2)32. Correct order of molar extinction coefficient values of the visible asbsorption

bands for the following species is(1)

(2)

(3)

(4) Correct Option : (2)

33. The cell potential (in V) of a Ag/AgCl/KCl electrode connected to the standard hydrogen electrode at 298 K is closest to (Given Eº(AgCl/Ag.Cl–) = 0.222 V and assume that the activity of KCl is 0.01)(1) 0.197 (2) 0.297 (3) 0.340 (4) 0.440Correct Option : (3)

34. Consider the entropy changes in a system undergoing transformation, as depicted in the diagram, below

The correct statement among the following(1) (2) (3) (4) Correct Option : (4)

35. Consider four species A, B, C and D

Oxidation of A with C in an acidic medium gives D, A, B, C and D are respectively.(1) SO4O6

2–, I2,KIO3 and SO42– (2) SO4O6

2–, KIO3, I2and SO42–

(3) SO4O32–, KIO3 ,I2 and S4O6

2– (4) S2O32–, KIO3 , I2 and SO4

2–

Correct Option : (3)36. The common heptacity observed for coordination of C60 to a metal center is

(1) 2 (2) 4 (3) 5 (4) 6Correct Option : 1(1)


37. For an octahedral Cu2+ complex depicting axial EPR spectrum (g||> g|), the gemotery of Cu2+ and the orbital containing the unpaired electron are, respectively.(1) Tetragonally elongated, dx2–y2 (2) Tetragonally compressed, dz

2

(3) Tetragonally eleongated, dz2 (4) Tetragonally compressed, dz2–y2

Correct Option : (1)38. A liquid of density 1.1g cm–3 climbs to a height of 5.0 cm when a cpacillary with

internal radius of 0.2 mm is dipped into it. The surface tension (in NM–1) of the liquid is closest to(1) 0.05 (2) 0.108 (3) 0.018 (4) 0.005Correct Option : (1)

39. Identify from following, the products of K-electron capture by the nucleus:(A) neutron (B) neutrino (C) position(1) A only (2) A and B (3) C only (4) B and C Correct Option : (2)

40. The correct order for the rate of thermal decarboxylation of the following compound is

(1) C > B > A (2) C > A > B (3) A > C > B (4) B > C > ACorrect Option : (1)

41. True statement for the following transformation is

(1) Hº and Sº are positive (2) Hº and Sº are negative(3) Hº is positive and Sº is negative(4) Hº is negative and Sº is positiveCorrect Option : (2)

42. The most stable vanadium species in aqueous medium is(1) [V(H2O)5(OH)]2– (2) [VO(H2O5)]2–

(3) [VO(H2O)5– (4) [V(H2O)4(OH)2]2–


(1) (2)


(3) (4)

Correct Option : (4)44. The frequency of O – H stretch occurs at ~3600 cm–1. The O–D stretch frequency

(in cm–1)(1) 3000 (2) 2600 (3) 1800 (4) 900Correct Option : 2

45.

(1) one singlet (2) one doublet (3) two singlets (4) two doubletsCorrect Option : (4)

46. If the rate constant for a base catalyzed ester hydrolysis reaction is 0.20 L mol–1s–1, half-life (in s) of the ester (Given [ester]º = 0.05 mol. L–1) would be closed to(1) 40 (2) 100 (3) 140 (4) 200Correct Option : (2)

47. The correct match for drug molecules in the column A with their medicinal use in Column B is


(1) P-i, Q –ii, R-iii (2) P –ii; Q-i; R-iii(3) P-iii, Q-i, R-ii (4) P-i; Q-iii; R-iiCorrect Option : (1)

48. Molar composition of a mixture of P and Q at equilibrium is 3 :1 (P : Q). A small disturbance in composition results in change of chemical potential of P by 10 J mol–1. The chemical potential (1) 30 (2) 3.3 (3) –30 (4) –3.3Correct Option : (3)

49. The magnitude of bond angles in gaseous NF3, SbF3 and SbCl3 follow the order(1) NF3 < SbF3 > SbCl3 (2) SbCl3 > SbF3 > NF3

(3) SbF3 > SbCl3 > NF3 (4) NF3 > SbCl3 > SbF3


(1) (2)

(3) (4)

Correct Option : (4)51. A cube does not have the symmetry element


(1) C2 (2) C3 (3) C4 (4) C6

Correct Option : (4)52. The pair of hight source and atomizer resulting highest sensitivity to atomic

absorption spectrometric measurement is :(1) Hg lamp ; nitric oxide flame(2) Hg lamp; graphite furnace(3) Hollow cathode lamp; graphite furnace(4) Hollow cathode lamp; acetylene-nitric oxide flameCorrect Option : (3)

53. In common glass electrode, alkaline error caused at pH : 10 is least for(1) 0.01 M NaCl (2) 1.0 M NaCl(3) 1.0 M LiCl (4) 1.0 M KClCorrect Option : (4)

54. The pair of lanthanide ions which show significant deviation between the experimental and calculated magnetic moments, considering contribution from the gournds state only (given µeff = g[J(J+1)]1/2, is(1) Gd3+ and Lu3+ (2) Sm3+ and Tb3+

(3) Eu3+ and Tb3+ (4) Sm3+ and Eu3+


(1) (2)

(3) (4)


(1) (2)


(3) (4)

Correct Option (4)57. Elcb mechanism is followed in the reaction of

(1) 2-bromopentane with t-BuOK of give pent-2-ene(2) nitromethane with benzaldehyde in the presence of KOH to give -nitrostyrene(3) bromobenzene with NaNH2 to give aniline(4) p-chloronitrobenzene with NaOMe to give p-nitroanisoleCorrect Option (4)

58. Consider a two-level system in which the excited state, separated from the ground state by energy , is doubly degenerate. The fraction of the molecules in the excited state, as T ∞, is(1) 1/3 (2) 1/2 (3) 2/3 (4) 1Correct Option : (3)

59. The correct order of basicity of the following anions is

(1) B > A > C > D (2) D > B > C > A(3) C > D > B > A (4) B > A > D > CCorrect Option (4)

60. The titration of 4.4 g of a polymer having carboxylic acid end group requires 11 mL of 0.02 M NaOH. The average molar mass (in kg mol–1) of the polymer is(1) 40 (2) 20 (3) 15 (4) 10

61. The rate-determining step in the catalytic synthesis of acetic acid by Monsanto process is(1) oxidative addition of CH3I to [RhI2(CO)2]–

(2) migration of CH3 to CO [RhI2(CO)2(CH3)]–

(3) loss of CH3COI from [RhI3(CO)2(COCH3)]–

(4) coordination of CO [RhI3CO(COCH3)]–

Correct Option (1)


62. The rate constant of a second order reaction 2A Z is k2. If the initial concentration of the reactant is a0 and the concentration of the product at time t is x, then a linerar function of t with the slope k2a0 is

(1) (2)

(3) (4)

Correct Option: (1)63. The major product A and the by products B formed in the following reaction are

(1)

(2)

(3)

(4)

Correct Option : (1)64. Choose the equilibria from the follwoing that are NOt favoured to go to right.

(1) A and B (2) A and C (3) B and C (4) B and D65. The correct absolute configuration of the following compounds is

(1) I : M : II : R (2) I : M : II : S(3) I : P, II : R (4) I : P, II : SCorrect Option : (1)


66. The compound that shows peaks in the EI mass specturm at m/z 121`, 105, 77, 44 is

(1) (2)

(3) (4)


(1) (2)

(3) (4)


68. The major product A and B in the following reaction sequence are

(1)

(2)


(3)

(4)

Correct Option : (2)69. Match the items in Column I with those of Column II

The correct match is(1) a-iv, b-ii, c-iii, d-i (2) a-i, b-iv, c-ii, d-iii(3) a-iv, b-i, c-ii, d-iii (4) a-iv, b-i, c-iii, d-iiCorrect Option : (3)

70. The degeneracy of the state having energy 27h2

8mL2 for a particle in a 3-D cubic box

of length L is(1) 4 (2) 3 (3) 2 (4) 1Correct Option : (1)

71. The spatial part of the dominant resonance structure of the LiH molecule is (only valance part of the wavefunction is shown).

(1) (2)

(3) (4) Correct Option : (4)

72. FeCr2O4 and NiGa2O4 have normal and inverse spinal structures, respectively. The correct statement is(1) Fe(II) and Ni(II) occupy octahedral sites(2) Fe(II) and Ni(II) occupy tetrahedral and octahedral sites, respectively


(3) Cr(III) and Ga(III) occupy only octahedral sites(4) Cr(III) and Ga(III) occupy tetrahedral and octahedral sites, respectivelyCorrect Option : (2)

73. The intermediate A and the major product B formed in the following reaction are

(1)

(2)

(3)

(4)

Correct Option : (2)74. The cluster types of [Fe5(CO)14N]– and [CO6(CO)13N]– are, respectively.

(1) nido-, indo- (2) nido- closo-(3) closo-, nido- (4) closo- closo-Correct Option : (2)

75. The structure of the compound, which displays the following spectral data is IR = 1690, 1100 cm–1

(1)

(2)

(3)


(4)


76. The species for which the shapes (geometry) can be be predicted by VSEPR theory is/are(A) [PtCl4]2– (B) [TeCl6]2– (C) PFe3 and SF6 (D) PF3 and SF6

(1) A and B (2) B and C (3) C only (4) A and bCorrect Option : (3)

77. The correct statement about base hydrolysis of [Co(py)4Cl2]– (py = pyridine) is(1) rate expression is, Rate = k[Co(py)4Cl2] [OH–](2) reaction does not depend on hydroxide ion concentration(3) reaction proceeds through SN1CB mechanism(4) intermediate involved in this reaction is [Co(py)4Cl2(OH)]Correct Option : (2)

78. Complex (es) which has/have unpaired electron (s) that is equal to that of iron centre in oxymyoglobin is/are(A) [Fe(ox)3]3– (B) [Fe(CN)6]3– (C) [NiCl4]2– (D) [Cu(NH3)4]2–

(Given : ox = oxalato)Correct answer is(1) A and B (2) B and D (3) C only (4) C and DCorrect Option : (2)

79. The main product of nucleophillic attack of H– on the complex ion given below is

(1) (2)


(3) (4)


`(1)

(2)

(3)

(4)


81. The intermediate A and the major product B formed in the following reaction are.

(1)

(2)


(3)

(4)

Correct Option : (2)82. Consider the gas phase rection 2A(g) at a given temperature. When

2.0 moles of A(g) are reacted with 2.0 moles of B89g), 0.8 moles of C(g) are formed at equilibrium at a total pressure of 2.0 bar. The value of the equilibrium constant, Kp of this reaction at the given temperature is closest to(1) 0.3 (2) 0.9 (3) 2.4 (4) 19.1Correct Option : (3)

83. In a polymer of N monomer units, the root mean square separation between the two ends is proportional to

(1) N12 (2) N (3) N

32 (4) N2

Correct Option : (1)84. For the electrochemical cell Ag|AgCl|MCl(0.01M)|MCl(0.02M)|AgCl|Ag, the

junction potential is the highest when M+ is(1) H+ (2) Li+ (3) Na+ (4) K+


85. The function, which is NOT an eigenfunction ofthe indicated operator, is

(1)

(2)

(3)


(4)

Correct Option : (2)86. The oxidation of NO to NO2 occurs via the mechanism given below.

(1) 2k1(NO)2 (2) 2k1k2(NO)2(O2)

(3) (4) 2k2(NO)2

Correct Option : (4)87. Among SO2(OH)F, CH3CO2H, LiF and H2O the compound (s) which behave (s) as

a base in liquid HF is/are(1) CH3CO2O and LiF only(2) LiF only(3) SO2(OH)F and LiF only(4) CH3CO2H, LiF and H2OCorrect Option : (4)

88. The reducible representation, I, in the table is equal to the following superposition of the irreducible representations of C2v point group.


Correct Option : (2)89. Product A and B formed in the following transformation of alkylidenecarbenes are

Correct Option : (1)90. The major product of the following reaction is


Correct Option : (2)91. In Mossbauer spectrum of a sample containing iron recorded in the presence of a

static magnetic field, the number of possible allowed transition(s) is(1) Two (2) Four (3) Six (4) EightCorrect Option : (3)

92. Match column I, II and III

The correct match is(1) A-iii-Y; B-i-Z; c-ii-X(2) A-iii-Y; B-ii-X; C-i-Z(3) A-ii-X, B-i-Y;C-iii-ZCorrect Option (1)

93. Match the items in column I with those of coumn II

Correct match is(1) a-ii; b-iv, c-i, d-iii (2) a-iii; b-i, c-ii, d-iv


(3) a-iii; b-ii; c-iv; d-i (4) a-i; b-iii; c-iv, d-iiCorrect Option : (1)


Correct Option : (1)95. X-rays of 173 pm wavelength are reflected by the (111) plane of a cubic primitive

crystal of = 30º. The unit cell length (in pm) is closest to(1) 173 (2) 300 (3) 346 (4) 600Correct Option : (2)

96. The molar residual entropy (in JK–1) of solid OCS would be closest to(1) 0 (2) 2.9 (3) 5.8 (4) 8.7Correct Option : (3)



Correct Option : (3)98. True statement regarding Hammett reaction constant () for the following

transformations :

(1) for A and B is same and positive(2) for A and B is same and negative(3) for A is larger positive value than for B(4) for A is negative and for B is positiveCorrect option : (3)

99. 1.0 mol of a perfect monatomic gas is put through the cycle shown in the figure. The total work (in J) done during the cycle is(use 1L-bar = 100 J, R =83. JK–1 mol–1 = 0.083 L-bar K–1, in 2 = 0.7)


(1) 930 (2) –4183 (3) 8831 (4) –5113Correct option : (2)

100. The Huckel molecular orbital of benzene that is degenerate with the molecular

orbital is :

(1) (2)

(3) (4) Correct option : (1)

101. For the reaction K + Br Br, which follows the harpoon mechanism, the reactive cross

section is closest to :

(Use J m, Ionization energy of K = 422.5 kJ mol-1 electron affinity of Br2 = 250 kJ mol–1 and NA = 6 × 1023 mol–1)(1) 50 × 10–18 m2 (2) 2 × 10–18 m2 (3) 64 × 10–18 m2 (4) 16 × 10–18 m2

Correct option : (2)102. In the pure rotational microwave spectrum of a XY molecule, the adjacent lines

are separated by 4 cm–1. If the molecular is irradiated by a radiation of 30,000 cm–1, the first stokes line (m cm–1) appears at :(1) 29988 (2) 30012 (3) 30004 (4) 29996Correct option : (1)

103. The correct order of the reaction involved in the following transformation is :


(1) Michael addition, Quasi-Favourkii rearrangement, Aldol condensation(2) Quasi-Favorskii rearrangement, Michael addition, Aldol condensation(3) Michael addition, Aldol condensation, Quasi-Favorskii rearrangement(4) Aldol condensation Quasi-Favorskii rearrangement, Michael additionCorrect option : (3)

104. The correct match of spin only magnetic moment for the complex cis-[Fe(phen)2(NCS-N)2](1) 4.89 BM for both A and B (2) 0 BM for both A and B(3) 4.89 BM for A and 0 BM for B (4) 0 BM for A and 4.89 BM for BCorrect option (3)

105. In spectrofluorimateric determination in solution A. absorbance of analyte solution is kept near to 0.05B. Oxygen is eradicated from solutionC. pH of solution is controlledD. wavelength of incident light is always above 400 nmCorrect from the above is :(1) A, B and D (2) B, C and D (3) A, B and C (4) A, C and DCorrect option : (3)

106. The electrolyte solution that has the smallest Debye-length at 298 K is :(1) 0.01 M NaCl (2) 0.01 M Na2SO4 (3) 0.01 M CuCl2 (4) 0.01 M LaCl3

Correct option : (4)107. Consider the following statements :

(A) The highest oxidation state group 8 elements is more readity shown in their oxides than in fluorides.(B) Fe can exist in –2 formal oxidation state also.(C) Mn, Tc and Re easily from M (II) compoundsThe correct statement(s) is/are :(1) A and B (2) A and C (3) B and C (4) C onlyCorrect Option : (1)


108. (Cp – Cv) for a non-ideal gas differs from (Cp – Cv) for a perfect gas by the expression :

(1) (2) (3) (4) Correct option (2)

109. In trans 1, 2-dichloroethylene, the IR inactive mode is :(1) C–Cl symmetric stretch (2) C–Cl asymmetric stretch(3) C–H asymmetric stretch (4) In phase out of plane C–Cl bendCorrect option : (1)

110. The reaction that gives (E)-2 methylhex-3-ene as the major product is :

(1) (2)

(3) (4)

Correct Option : (4)111. The correct order of metal-carbon distance is :

(1) Fe(5–Cp)2 > Co(5–Cp)2 > Ni (5–Cp)2

(2) Fe(5–Cp)2 > Ni(5–Cp)2 > Co (5–Cp)2

(3) Ni(5–Cp)2 > Fe(5–Cp)2 > Co (5–Cp)2

(4) Ni(5–Cp)2 > Co(5–Cp)2 > Fe (5–Cp)2

Correct option (4)112. The major product formed in the following reaction is :


(1) (2)

(3) (4)

Correct option (2)


(1) (2)

(3) (4)

Correct option (2) 114. The order of a surface catalyzed unimolecular reaction, at very low and very high

pressures of the reactant, would be, respectively :(1) 0, 0 (2) 1, 0 (3) 0, 1 (4) 1,1 Correct option (2)



(1) (2)

(3) (4)

Correct option : (2) 116. In the electronic spectrum of [IrBr6]2–, the number of change transfer band(s) and

their origin are respectively :(1) Two, ligand metal (t2g and alg*)(2) One, ligand metal (eg)(3) Two, ligand metal (t2g and eg)(4) One, ligand metal (t2g)Correct option : (3)

117. The correct statements for dithionite and dithionate amions from the following are (A) both have S–S bond(B) both are dianionic(C) oxidation state of sulphur is +3 and +5, respectively(D) Sulphur in dithionate has lone pair of electrons.(1) A, B and C (2) A, B and D (3) B, C and D (4) A and B onlyCorrect option : (1)


(1) (2)


(3) (4)

Correct option (2)119. In linear variation method using two orthogonal basis function, the two roots

obtained are and . The correct relation of these with exact ground and first excited state energies, E0 and E1, respectively, is :(1) > E0 and < E1 (2) < E0 and > E1

(3) < E0 and < E1 (4) > E0 and < E1

Correct option : (4) 120. The major products A and B formed in the following reactions are :

(1)

(2)

(3)

(4)

Correct option (1)

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