University of Hyderabad (UoH) 2011 M.Sc Chemistry Entrance for - Question Paper

(A) 2e ^/3    (B) Ae ^/j    (C) Ae ^/z    (D) Ae

43.    Compound I gives a strong infrared absorption at 1730 cm¹. *H NMR spcctrum indicates that it has two types of hydrogen atoms; one H atom appearing as singlet at 5 = 9.7 ppm and 9 H atoms appearing as a singlet at 8 = 1.2 ppm. The structure of 1 is

CH3    CH3

^{<A) HaC} ch3^{H0    (B)} h₃c^cho

ch₃

(C) HaC/CHO    (D)    \

H₃C CHO

44.    In a titration experiment, the end point indicates

(A) apparent equivalence point    (B) completion of precipitation

(C) neutralization point    (D) exact equivalence point

45.    The structures I and II, shown below, correspond to:

^{OH    H}

I    II

(A) 5-lactic acid and 5-alanine    (B) /?-lactic acid and /?-alanine

(C) fl-lactic acid and 5-alanine    (D) 5-lactic acid and /{-alanine

46.    The magnetic quantum number of the last electron in the atom with atomic number 21 is (A) 4    (B) 2    (C)3    (D) 1

9/

47.    If the number e is marked as a point on the complex plane, what is the distance of the point from the origin?

(A) 1    (B) 3    (09    (D) tan *9

48.    What is the electronic configuration of V³⁺?

(A) [Ar]3d²    (B) [Kr]3d²    (O [Ar]3d³    (D) [Kr] 3d³

49.    The hybridization that is common for at least one of the carbon atoms in hydrogen cyanide, carbon disulfide, aliene and carbon monoxide is

(A) sp    (B) sp²    (C) sp³    (D) dsp³

50.    Which one among the given functions has the smallest slope at x = 1?

(A)2x*-3    (B) 2-1    (02x*-2*    (D )2j?-x

51.    The order of basicity of the following substituted anilines is NHo

(A)i>n>m>iv    (B)iv>i >m>n

(Qrv>H>i>m    (D)iv>m>i>ii

52. According to crystal field theory, the 9^th electron of the metal centre in square planar [Cu(NH3)4]²⁺ resides in

(A) d_xy    (B) d_z,    (C) d_xW    (D) d_xz

53.    The rotation of pure /?(+)-Limonene is +123.0. Calculate the % of the (+) isomer in a sample showing a rotation of +109 ?

(A) 8.6    (B) 77.2    (C) 94.3    (D) 82.9

54.    An ideal gas undergoes isothermal and reversible expansion from its initial volume to some final volume at 300 K drawing in 90 kJ of heat. The change in the Gibbs free energy of the gas is

(A) 300 J    (B) 0 J    (C) 150 J    (D) -300 J

I

55. For 0 < a< 1, lim [nxe'dx =

0

(A)|    (B)oo    (C.)0    (D) 2

56.    The two strands of double helical DNA are associated by hydrogen bonds between adenine (A) and thymine (T), and between guanine (G) and cytosine (C). The numbers of hydrogen bonds between A-T and G-C pairs, respectively are:

(A) one, two    (B) two, two    (C) three, two    (D) two, three

57.    The intermediate involved in Curtius rearrangement is

(A) carbenium ion    (B) carbanion

(C) nitrene    (D) carbene

58.    An organic compound on decomposition at 500C and 1 atm. pressure released 2 mL each of carbon monoxide, nitrogen and water vapour. The empirical formula of the molecule is

(A) CHNO    (B) CH₂N₂0₂    (C) CH₂N₂0    (D) CH₂NO

VH|

59.    4<P[<^J] =

at

(A) l//²    (B) exp(f*)

(C) 2fexp(f²)    (D) (\/2t)exp(t²)

60.    Nesslers reagent is prepared by mixing a solution of KI with a solution of X and then adding KOH solution. Here X is

(A)ZnCl₂    (B)HgCl₂    (C)A1C1₃    (D)TiCL,

61. The intermediate acid involved in the following reaction is

A

NH₄(CNO)-- NH₂CONH₂

(A) cyanic acid (B) cyanuric acid (C) thiocyanic acid (D) uric acid

62.    50 mL of 0.04 M HC1 solution was mixed with 50 mL of 0.02 M AgN0₃ solution, stirred and filtered. The pH of the filtered solution is

(A) 1    (B) 4    (C) 3    (D) 2

63.    (1 + 2/)'¹ is equal to

(A) 1-2/    (B) (1/5) - (2/5)*

(C) (1/3)- (2/3)/    (D)-(1/3) +(2/3)/

64.    Which of the following fluorides is angular?

(A) SnF₂    (B) ZnF₂    (C) BeF₂    (D) XeF₂

65.    The more reactive dienophile among the following for the reaction with cyclopcntadienc is

C0₂Et    <p2^Et

^<A) r    ^(B> e₂A

cn    Jrr

^(C) bA    ^(D)

Y-l

66.    Given that ^,8F undergoes 90 % radioactive decay in 366 min., the half life (ti/2) for ¹⁸F is (A) HOmin. (B) 3473 min.    (C) 154 min.    (D) 220 min.

67.    The phenolic compound among the following is:

(A) Ibubrufcn (B) Camphor    (C) Penicillin    (D) Paracetamol

68.    What is the hydroxide ion concentration of a solution that has a pH of 11.20?

(A) 6.31x10'^,2M (B) 11.20 M    (C) 1.58xl0'³ M (D)2.80M

69.    For all values of x which determinant among the following is zero?

70. The conductivity of sodium dodecyl sulfate (SDS) solution exhibits a sharp transition around 8 mM concentration. This is because:

(A)    SDS precipitates beyond 8 mM concentration.

(B)    SDS forms micelles above 8 mM concentration.

(C)    SDS forms a gel above S mM concentration.

(D)    SDS undergoes hydrolysis above 8 mM concentration.

71.    According to the equation 2Fc³⁺ +21 - I₂ + 2Fc²⁺

how many grams of iodine can be produced by reacting 7.4 mols of Fe³* and 7.0 mols of r ? [At. Wt. of iodine is 127]

(A) 9.1 x 10² g (B) 8.9 x 10² g (C)9.4xl0²g (D)17.8xl0²g

72.    The most appropriate spectroscopy for the identification of a nitrile group is (A) IR    (B)'HNMR    (C)UV    (D)ESR

73.    If the units for rate are M s'¹, what are the units for the rate constant, k, for a zeroth-order reaction?

(A) Ms¹    (B) M's*¹    (C) s'¹    (D) M'¹

\MI

74.    The function with a finite range is (A) e^x    (B)    (C) a?    (D) e"**

75.    How many grams of copper will be produced when 27 g of aluminium is added to excess cupric sulphate solution? [At. wts.; A1 = 27, Cu = 63.5]

(A) 63.50    (B) 95.25    (C) 90.50    (D) 122.25

76.    Assuming the additivity of covalent radii [C 0.77 A, Br 1.14 A], and assuming the distance between adjacent carbon atoms in the ring as 1.40 A, the distance between the centres of bromine atoms in 1,2-dibromobenzene is (A) 3.31 A    (B) 3.42 A    (C) 4.20 A    (D) 2.28 A

77.    The number of stereoisomers for CHD=CH-CH=CHD is (A) 6    (B) 8    (C)2    (D) 4

78.    The entropy change associated with the expansion of one mole of an ideal gas from an initial volume of V to a final volume of 2.50 V at constant temperature is (R = gas constant)

(A) AS = - R In 2.50    (B) AS = R In 2.50

(C) AS = 2.50 R In (Vf/Vi)    (D) AS = - 2.50 R In (V,/Vi)

79.    The smallest among the following integrals is

i i i (A) fedx    (B) jedx    (C) jedx

0 0 0

80.    The quaternary structure of human hemoglobin is a

(A)    dimer of two myoglobin dimers.

(B)    tetramer of identical subunits.

(C)    tetramer of four different subunits.

(D)    tetramer of two different subunits.

\M)

81.    The number of isomers having non-zero dipole moment for PCI2F3 in the trigonal bipyramidal geometry is

(A) 3    (B) 2    (C) 1    (D) 0

82.    The most appropriate reagent for the conversion of RCOOMc into RCH₂OH is

(A) NaBHj    (B) NaH    (C) UBH4    (D) Pd/C and H₂

83.    Which of the following statements must be true for the entropy of a pure solid to be zero?

(I)    The temperature must be 0 K.

(II)    The solid must be crystalline, not amorphous.

(IE) The solid must be perfectly ordered.

(IV) The solid must be an element.

(A) I, D and in (B) I and II    (C) I    (D) I, II, III and IV

84.    The function with exactly two minima and one maximum, among the following is (A) x + x² - x⁴ (B) x⁴ - x² - x    (C) x³ - x² - x    (D)x + x²-x³

85.    Collagen is

(A)    an a-helical structural protein.

(B)    a coilcd-coil protein found in hair.

(C)    a cross-linked globular protein.

(D)    a triple-helical fibrous protein.

86. How many milliliters of 2 M NaCl solution are required to make one litre of 0.4 M NaCl solution by adding water?

(A) 5000 ml    (B) 800 ml    (C) 200 ml    (D) 20 ml

87.    Which of the following compounds is aromatic?

   A

(A) r>H    (B) I j

   N

H

(C) (fNH    (D) O^h

88.    A 0.01 M solution of a compound transmits 20 % of visible light when the absorbing path length is 1.5 cm. What is the molar extinction co-efficient of the substance? Solvent is assumed to be completely transparent.

(A) 46.6 M cm'¹ (B) 50.3 NT'cm'¹ (C) 22.3 M*¹ cm'¹ (D) 43.6 M'^Icm¹

89. Which of the following atoms has the highest number of unpaired electrons in its ground state?

(A) N    (B) C    (C) O    (D) F

90. Which of the following compounds has the highest boiling point?

(A) Toluene    (B) Benzene

(C) Mesitylene    (D) Cyclohexane

91.    Which one of the following statements do not apply to interhalogen compounds?

(A) Could be neutral    (B) Could be cationic

(C) Could be anionic    (D) Always obey octet rule.

92.    The product obtained by the reaction and two equivalents of Na is:

(A) O

(c> H

V- M

93.    Which of the following pair has the lowest interfacial tension?

(A) n-decane/water    (B)-octyl alcohol/water

(C) air/water    (D) n-butan e/water

94.    The gas pressure in an aerosol container is 1.5 atm at 25 *C. Assuming an ideal behavior of the gas, if the container is heated to 450 C, the pressure would be closc to

(A) 1.023 atm (B) 1.234 atm (C) 3.639 atm    (D) 2.639 atm

95.    The order of increasing dipole moment among H2S, H₂0 and BF₃ is

(A) BF₃ < H₂S < H₂0    (B) H₂0 < H₂S < BF₃

(C) H₂S < H₂0 < BF₃    (D) BF₃ < H₂0 < H₂S

96.    The best method for the following transformation is

(A) acid mediated hydration    (B) hydroboration-oxidation

(C) ozonolysis-reduction    (D) oxymercuration-demercuration

97.    The concentration of Ba²* in saturated BaSU solution at 27 C is 1.04 x 10'⁵ M. What is the solubility product (K,_P) for BaS0₄ at this temperature?

(A) 1.04 x 10¹⁰ M    (B) 2.08 x 10 ⁵ M

(C) 0.52 x 10¹⁰ M    (D) 1.08 x 10¹⁰ M

98.    What is the hybridization of sulfur in SF4?

(A) sp²    (B) sp³d    (C) sp-    (D) sp²d²

99. The ester that undergoes acid hydrolysis most readily is CO2M6

(C) [fS    (D)

COjMs

Br 0?Me

100. If the half-life of a reaction is independent of its initial concentration, then the reaction may be categorized as

(A) zeroth order    (B) first order

(C) sccond order    (D) bimolecular

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