BKU-14141-A 1 [Turn over
ROUGH WORK

1. Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being

4f orbitals more diffused than the 5f orbitals


lesser energy difference between 5f and 6d than between 4f and 5d orbitals


more energy difference between 5f and 6d than between 4f and 5d orbitals


more reactive nature of the actinoids than the lanthanoids


2. Which one of the following is the correct statement

Boric acid is a protonic acid


Beryllium exhibits coordination number of six


Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase


B2H6.2NH3 is known as 'inorganic benzene'


3. Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is

R4Si RSiCl3


R2SiCl2 R3SiCl


4. In a compound atoms of element Y from ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be
XY(B) XY
43 23
X2Y X3Y4
5. Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl

gets oxidised by oxalic acid to chlorine


furnishes ions in addition to those from oxalic acid


reduces permanganate to Mn2+


oxidises oxalic acid to carbon dioxide and water


6. Which one of the following pairs of species have the same bond order

CN- and NO+ CN- and CN+


and CN- NO+ and CN+


7. The IUPAC name for the complex (NH3)5]Cl2 is

nitrito-N-pentaamminecobalt chloride


nitrito-N-pentaamminecobalt chloride


pentaammine nitrito-N-cobalt chloride


pentaammine nitrito-N-cobalt chloride


8. A metal, M forms chlorides in its and oxidation states. Which of the following statements about these chlorides is correct

MCl2 is more volatile than MCl4


MCl2 is more soluble in anhydrous ethanol than MCl4


MCl2 is more ionic than MCl4


MCl2 is more easily hydrolysed than MCl4


9. Which of the following statements is true

H3PO3 is a stronger acid than H2SO3


In aqueous medium HF is a stronger acid than HCl


HClO4 is a weaker acid than HClO3


HNO3 is a stronger acid than HNO2


10. Which one of the following sets of ions represents a collection of isoelectronic species

Sc3+ S2-


S2- Mg2+ Ca2+


11. What products are expected from the disproportionation reaction of hypochlorous acid

HClO3 and Cl2O HClO2 and HClO4


HCl and Cl2O HCl and HClO3


12. In the Fe C bond possesses

p-character only both s and p characters


ionic character s-character only


13. Lanthanoid contraction is caused due to

the appreciable shielding on outer electrons by 4f electrons from the nuclear charge


the appreciable shielding on outer electrons by 5d electrons from the nuclear charge


the same effective nuclear charge from Ce to Lu


the imperfect shielding on outer electrons by 4f electrons from the nuclear charge


14. Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture

The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group


In both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group


Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens


In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group


15. How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion

Six Three


One Two


16. Hydrogen bomb is based on the principle of

Nuclear fission Natural radioactivity


Nuclear fusion Artificial radioactivity


17. An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces of the cube. The empirical formula for this compound would be

AB A2B


AB3 A3B


18. During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud'. These are

Sn and Ag Pb and Zn


Ag and Au Fe and Ni


19. The molecular shapes of SF4, CF4 and XeF4 are

the same with 0 and 1 lone pairs of electrons on the central atom, respectively


the same with 1 and 1 lone pair of electrons on the central atoms, respectively


different with 1 and 2 lone pair of electrons on the central atoms, respectively


different with 0 and 2 lone pairs of electron on the central atoms, respectively


20. The number and type of bonds between two carbon atoms in calcium carbide are

One sigma, one pi One sigma, two pi


Two sigma, one pi Two sigma, two pi


21. The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is

zero two


one three


22. Which one of the following ions has the highest value of ionic radius

Li+
O2- B3+






23. The transition metal present in vitamin B12 is

Fe Ni


Co Zn


24. How many electrons are involved in the oxidation by KMnO4 in basic medium

5
25. The shape of XeF2 molecule is

tetrahedral pyramidal


trigonal planar linear


26. During the extraction of Fe, slag obtained is

FeO FeSiO3


MgSiO3 CaSiO3


27. The lightest particle is

electron proton


neutron a-particle


28. Which of the following elements does not exhibit allotropy

Arsenic Tin


Silicon Bromine


BKU-14141-A 6
29. Which one of the following pairs of elements does not illustrate the diagonal relationship in the Periodic Table

Li and Na Li and Mg


Be and Al B and Si


30. Nitric acid converts iodine into

hydriodic acid iodic acid


hypoiodous acid ammonium iodine


31. Which of the following molecules has highest dipole moment

H2S CO2


CCl4 BF3


32. Ferrocene cannot undergo

Friedel-Crafts acylation Diels-Alder reaction


oxidation by Ag+ ion electrophilic reaction


33. BCHis isoelectronic with
102 12
BH2- BH
1212 1212
BH+ BH2+
1212 1212
34. Which of the following does not have a metal-metal bond
KReCl(B) Mn(CO)
222 210
HgCl(D) AlCl
22 26
35. On heating, zinc oxide becomes yellow and on cooling, becomes white. This shows that it is

an oxidizing agent areducing agent


a Lewis acid non-stoichiometric


36. The conjugate base of H3O+ is

H2O


H2O2 OH-


37. Of the following isotopes, the one that is not radioactive is
132 131

40Ca 90Sr


38. Which of the following is a soft base

CH3COO-


NO3- CO32-


39. Which of the following products is obtained on heating, B2H6 with NH3 in ratio 1 3 at higher temperature
BNH(B) BH.2NH
33 3 263
Boron nitride B3N3H6
40. The product obtained by successive emission of an alpha particle and a beta particle from
238U
92 is an isotope of

radium thorium


lead protactinium


41. Reaction of trans-2-phenyl-1-bromocyclopentane with alcoholic KOH produces

4-phenylcyclopentene 2-phenylcyclopentene


1-phenylcyclopentene 3-phenylcyclopentene


42. Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2-fluoroethanol is

Eclipse, Gauche, Anti Gauche, Eclipse, Anti


Eclipse, Anti, Gauche Anti, Gauche, Eclipse


43. Which of the following is a polyamide

Teflon Nylon-66


Terylene Bakelite


44. Which one of the following types of drugs reduces fever

Analgesic Antipyretic


Antibiotic Tranquiliser


45. Due to the presence of an unpaired electron, free radicals are

Chemically reactive Chemically inactive


Anions Cations


46. 2-methylbutane on reacting with bromine in the presence of sunlight gives mainly

bromo-2- methylbutane bromo-2- methylbutane


bromo-3- methylbutane bromo-3- methylbutane


47. Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of

insolubility instability


inductive effect steric hindrance


48. Reaction of one molecule of HBr with one molecule of 3-butadiene at 40 Degree C gives predominantly

3-bromobutene under kinetically controlled conditions


1-bromo-2-butene under thermodynamically controlled conditions


3-bromobutene under thermodynamically controlled conditions


1-bromo-2-butene under kinetically controlled conditions


49. Among the following acids which has the lowest pKa value

CH3COOH HCOOH


(CH3)2COOH CH3CH2COOH


50. Fehling's solution and Benedict's solutions are reduced by glucose to form

CuO Cu2O


Cu(OH)2 Cu(CO)4


51. Which of the following is fully fluorinated polymer

Neoprene Teflon


Thiokol PVC


52. Two moles of acetone under the influence of sodium hydroxide will yield

4-methyl-2-pentanone 4-hydroxy-2-pentanol


4-methyl-2-pentanoic acid 4-hydroxy-4-methyl-2-pentanone


53. Which of the following bonds would show the strongest absorption in the IR

carbon-hydrogen oxygen-hydrogen


nitrogen-hydrogen sulfur-hydrogen


54. Alkyl halides react with dialkyl copper reagents to give

alkenes alkyl copper halides


alkanes alkenyl halides


55. Amongst the following the most basic compound is

benzylamine aniline


acetanilide p-nitroaniline


56. Which types of isomerism is shown by 3-dichlorobutane

Diastereo Optical


Geometric Structural


57. In a low resolution NMR spectrum of ethanol, the area under the peak corresponding to OH, CH2 and CH3 protons respectively will be in the ratio

1 2 3 3 2 1


1 3 2 3 1 2


58. In "nitration mixture" concentrated sulphuric acid is used as

sulphonating agent dehydrating agent


for the formation of nitronium ions for the formation of nitrate ions


59. The pyrimidine bases present in DNA are

cytosine and adenine cytosine and guanine


cytosine and thymine cytosine and uracil


60. The term anomers of glucose refers to

isomers of glucose that differ in configurations at carbons one and four and


a mixture of (D)-glucose and (L)-glucose


enantiomers of glucose


isomers of glucose that differ in configuration at carbon one


61. Phenyl magnesium bromide reacts with methanol to give

a mixture of anisole and Mg(OH)Br a mixture of benzene and Mg(OMe)Br


a mixture of toluene and Mg(OH)Br a mixture of phenol and Mg(Me)Br


62. The number of unshared electrons on the carbene carbon is

4
63. The simplest amino acid is

cystine alanine


glycine hoistidine


64. Acid anhydrides add to aromatic aldehydes in the presence of a base yield

unsaturated acids esters


.-unsaturated acids alcohols


65. Transition between the excited singlet and triplet states are

spin allowed spin forbidden


very frequent not observed


66. The stability of the cycloalkanes, as shown by the temperature at which the rings are broken by catalytic hydrogenation, is least for which of the following

Cyclopropane Cyclobutane


Cyclopentane Cyclohexane


67. The reactive intermediate involved in the conversion of phenol to salicylaldehyde using chloroform and sodium hydroxide

Cl2C Cl2CH+


Cl2CH- Cl2C+


68. Wolf-Kishner reduction is applied to one of the following functional groups







69. The number of 1H NMR spectrum 5-dibromotoluene is

6
70. Among the following the strongest electrophile is

NO+ NO2+
RN2+



H3


71. The heterocyclic compound, which exhibits tautomerism, is

pyrazole indole


pyrrole thiophen


72. The enzyme, which acts on starch, is

amylase esterase


protease urease


73. Which of the following is least reactive towards bromine

anisole chlorobenzene


nitrobenzene phenol


74. Raman spectrum is due to

absorption of energy by molecules emission energy by molecules


inelastic collisions absorption and re-emission


75. The Markovnikoff Rule is used in connection with

stereochemistry of elimination reactions


stability of free radicals


activity of enzymes


addition of acids to double bonds


76. To detect gas leakage from cylinders the substance added to LPG is

Phenols Thioalcohols


Glycols Glycine


77. In the Fischer projection formula, meso-2, 3-butanediol is in

a staggered conformation an eclipsed conformation


a gauche conformation ananticlinal conformation


78. Essential oils are

Mixtures of various hydrocarbons Mixtures of higher fatty acids


Mixtures of aldehydes Pleasant smelling liquids occurring in plants


79. Which of the following is not glycerides

Fat Phospholipid


Soaps Oils


80. Proteins do not respond to

Lucas test Biuret test


Ninhydrin test Haller's ring test


81. A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled, with everything else kept the same, the rate of reaction will

remain unchanged triple


increase by a factor of 4 double


82. In Langmuir's model of adsorption of a gas on a solid surface

the rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered


the adsorption at a single site on the surface may involve multiple molecules at the same time


the mass of gas striking a given area of surface is proportional to the pressure of the gas


the mass of gas striking a given area of surface is independent of the pressure of the gas


83. Rate of a reaction can be expressed by Arrhenius equation as k Ae-E/RT (where E/RT is read as power of in this equation, E represents

the energy above which all the colliding molecules will react


the energy below which colliding molecules will not react


the total energy of the reacting molecules at a temperature, T


the fraction of molecules with energy greater than the activation energy of the reaction


84. Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is

1.14 mol kg-1 3.28 mol kg-1


2.28 mol kg-1 0.44 mol kg-1


85. 18 g of glucose (C6H12O6) is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100ºC is

759.00 Torr 7.60 Torr


76.00 Torr 752.40 Torr


86. If a is the degree of dissociation of Na2SO4, the Vant Hoff's factor used for calculating the molecular mass is

1 a 1 a


1 2a 1 2a


87. Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas

The most probable speed increases


The fraction of the molecules with the most probable speed increases


The distribution becomes broader


The area under the distribution curve remains the same as under the lower temperature


88. Two solutions of a substance (non electrolyte) are mixed in the following manner. 480 ml of

1.5 M first solution 520 mL of 1.2 M second solution. What is the molarity of the final mixture

1.20 M 1.50 M


1.344 M 2.70 M


89. A reaction involving two different reactants can never be

Unimolecular reaction First order reaction


Second order reaction Bimolecular reaction


90. The disperse phase in colloidal iron hydroxide and colloidal gold is positively and negatively charged, respectively, which of the following statements is NOT correct

magnesium chloride solution coagulates, the gold sol more readily than the iron hydroxide sol.


sodium sulphate solution causes coagulation in both sols


mixing the sols has no effect


coagulation in both sols can be brought about by electrophoresis


91. For an isochoric process

Volume is constant Pressure is constant


Internal energy is constant Temperature is constant


BKU-14141-A 14
92. The protective colloid can convert

Irreversible colloid into a reversible colloid


Reversible colloid into irreversible colloid


Lyophobic colloid into lyophilic colloid


Lyophilic colloid into lyophobic colloid


93. Which is readily adsorbed by activated charcoal

Cl2 CO2


H2 SO2


94. Adsorption plays an important role in

Heterogeneous catalysis Homogeneous catalysis


Positive catalysts Negative catalysts


95. LeChatelier principle is applicable only to

Homogeneous reaction Heterogeneous reaction


Systems in equilibrium Systems not in equilibrium


96. For a zero order reaction, the plot of concentration vs time is linear with

Positive slope and zero intercept Negative slope and zero intercept


Positive slope and non-zero intercept Negative slope and non-zero intercept


97. The approximate voltage of dry cell is

2.0 V 1.2 V


6.0 V 1.5 V


98. During an isothermal expansion of an ideal gas, its

Internal energy increases Enthalpy decreases


Enthalpy remains unaffected None


99. Which law of thermodynamics introduce the concept of entropy

First law Second law


Zeroth law Third law


100. A buffer solution ofsodium acetate and acetic acid is diluted with water. Its pH will

Increase Decrease


Remains same None


101. Indicator used in the titration of KMnO4 against Fe2+ ion is

Methyl red Self indicator


Phenolphthalein Methyl orange


102. Which of the following is used as contact catalyst

Nickel Germanium


Boron Uranium


103. The kinetics of enzyme catalyst was suggested by

Henery Briggs


Langmuir Ostwald


104. Electrochemical equivalent of a substance is 0.0006735. Its equivalent weight is

65 67.35


130 260


105. Milk is an example of

Emulsion Suspension


Gel True solution


106. Which of the following is not a colligative property

Lowering of vapour pressure Elevation of boiling point


Boiling point Depression of freezing point


107. In an ideal gas, Joule-Thomson effect is

Positive Negative


Infinite Zero


108. Which of the following gas would have highest root mean square velocity at 25ºC

CO CO2


SO2 O2


109. The highest number of molecules are in

2 g of H2 2 g of N2


16 g of O2 16 g of CO2


110. Gold number indicates

Protective action of lyophilic colloid Protective action of lyophobic colloid


Amount of gold in a given solution Charge on gold solution


111. Total no of variables defining a system of C components with P phases is

3


C P 2 C-P 2


112. The collision theory is satisfactory for reactions

zero order unimolecular


bimolecular any order


113. The inversion temperature for a van der Waals gas is equal to

2a/Rb a/2Rb


a/Rb ab/2R


114. The units of the rate and rate constant are the same for reaction of order

2
115. At the boiling point of an azeotropic mixture, the number of degrees of freedom is

zero 1 at constant pressure


zero at constant pressure two


116. The Onsager equation helps us to find out

dissociation constant of a weak electrolyte


.0 for a weak electrolyte


transport number of an ion


.0 of a strong electrolyte


117. The triple point for water is

unique depends on p but is independent of T


depends on T but is independent of p depends on p and T


118. Catalyst used for the hydrogenation of vegetable oils is

Cu Finely divided Ni


Al2O3 Pt-black


119. The free energy .G when

The system at equilibrium Catalyst is added


Reactants are initially mixed thoroughly(D) Reactants are completely consumed


120. 50% of the amount of a radioactive substance decomposes in 5 years. The time required for the decomposition of 99.9% of the substance will be

10 years 25 years


75 years 50 years


ROUGH WORK

ROUGH WORK