TDC-41587-A
1 [Turn over
ROUGH WORK


1. The presence of three unpaired electrons in the nitrogen atom can be explained by

the Pauli exclusion principle the Aufbau principle


the Hund rule the Heisenberg uncertainty principle


2. The orbital with zero angular momentum is

f
3. Which of the following pairs have the identical electronic configurations

Se2- and Kr Mn2+ and Cr3+


Na+ and Cl- Ni and Zn2+


4. Which of the following has largest radius
O2-

Mg2+


Na+


5. Increasing order of electron affinity is

N O Cl Al O N Al Cl


Al N O Cl Cl N O Al


6. In going from left to right in a period

the basic nature of the oxides increases


acidic nature of oxides decreases


the basic nature of the oxides decreases


no gradation in the nature of oxides is observed


7. The first ionization potential of the following elements is in the order

C N O F C N O F


C N O F C N O F


8. Which one of the following ion is paramagnetic

Mg2+ Fe2+


Cu+ Sc3+


9. The ratio of the radius of the nuclides He42 and H11 is

3 1.6
10. The missing fission product in the reaction
2351146 1
U + n . La ...... is
92057 0
86Br 87Br
35 35
87Ge 89Br
32 35
11. Which of the following isotopes is used in the diagnosis and treatment of thyroid-gland-related disease
127I 131I

136I 138I

12. An atom of 298U92, after the adsorption of a slow neutron, undergoes fission to form two fragments 139Xe54 and 94 Sr38. What other particles produced

Alpha particles Beta particles


Neutron Positron


13. In nuclear reactor, chain reaction is controlled by introducing

Cd rod Fe rod


Pt rod Graphite rod


14. Which of the following hybrid orbitals has the highest value of electronegativity

sp3 sp2


sp dsp2


15. Which molecule has zero dipole moment

CH2Cl2 BF3


NF3 ClO2


16. The molecule that has linear structure is

CO2 NO2


H2


2 O

17. According to molecular orbital theory which of the following statements with respect to magnetic character and bond order is correct regarding O+2

Paramagnetic and bond order O2 Diamagnetic and bond order O2


Paramagnetic and bond order O2 Diamagnetic and bond order O2



18. The correct order of hybridization of the central atom in the following molecule, NH3, [Pt Cl4,
PCl5, BCl3

sp3, dsp2, dsp3, sp3 sp3, dsp2, dsp3, sp2


sp2, sp3, d2sp2, sp3 sp3, d2sp3, dsp3, sp2


19. Which is the correct order of increasing acidity
HPO HPO HPO(B) HClO HClO HClO
323334 234
HI HBr HCl HF HF H2O NH3 CH4
20. The main function of roasting is

to remove the volatile impurities to oxidize the metal


to reduce the metal oxide to make a slag


21. Which of the following is the thermite reaction
MgCO SiO. MgSiO FeO 3CO . 2Fe 3CO
323223 2
3MnO 8Al . 9Mn 4AlO(D) 2PbO PbS . 3Pb SO
3423 2
22. Mond's process is used to extract

Fe Co


Ni Pt


23. In the electrochemical process for Al extraction, the electrolyte used is

Al(OH)3 in NaOH solution


a molten mixture of AlO, NaAlF and CaF


23362

a molten mixture of Al2(SO4)3 and Al(OH)3


a molten mixture of AlO, Al(SO)


23243
24. Which of the following is used as a moderator in nuclear reactor

Hard water Heavy water


Deuterium Deionized water


25. Which of the metal ion is present in the haemoglobin, an oxygen carrier in the human body

Mg2+ Fe3+


Cu2+ Fe2+


26. Which of the following complex is used as an anti-cancer drug for treating several types of malignant tumours
cis [Pt Cl] trans [Pt Cl]
322 322

cis [Pt trans [Pt Cl
342 342
27. Fe3+ can be distinguished from Fe2+ by using a reagent which develops a red colour with Fe3+ due to the formation of a compound The reagent and the product are, respectively

and


NH4CNS and K3[Fe(SCN)6]


8-hydroxy-quinoline (oxime) and [Fe(oxime)3]


Na2HPO4 and FePO4


28. K2[HgI4] is useful for detecting

NO3 PO34




Cl- NH4


29. In qualitative group analysis, group IV metal ions can be precipitated out from the solution of a salt mixture by treating the solution with

H2S in HCl medium H2S in NH3 medium


NHCl and (NH)CO in NH medium


43 4233
30. In the brown-ring test for the nitrate ion, the brown ring appears due to the formation of

FeSO4·NO





31. Both geometrical and optical isomerisms are shown by

22 342


32. One mole of the complex compound Co(NH3)5Cl3 gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO3 solution to yield two moles of AgCl. The structure of the complex is

2NH(B) Cl


Cl·NH(D) Cl·NH


33 33 352
3423 3423
33. The EAN of cobalt in the complex ion is

27 33


24 36


34. In standardization of NaSO using KCrO by iodometry, the equivalent weight of KCrO
223227 227
is

molecular weight of KCrO/2 molecular weight of KCrO/3


molecular weight of KCrO/6 same as molecular weight of KCrO


227 227
227 227
35. The oxidation number of sulphur in SO, SF and HS respectively are
82222







36. Which of the following shows paramagnetism

N2 O2


F2 Zn2+


37. Zr and Hf have almost equal atomic and ionic radii because of

diagonal relationship lanthanide contraction


actinide contraction same period


38. The hybridization of Xe in XeF2 is

sp3 sp


sp3d sp2


39. Which compound acts as an oxidising as well as reducing agent

MnO2 CrO3


Al2O3 SO2


40. The correct order of magnetic moments is


[MnCl4]2- [CoCl4]2-




[MnCl4]2- [CoCl4




[CoCl4]2- [MnCl4




[MnCl4]2- [CoCl4


41. The alkyne which will react with KMnO4 to give pyruvic acid

Ethyne Propyne


Butyne 2-Pentyne

42. Arrange the following in the decreasing order of reactivity in electrophilic substition reactions


1 2 3 4 2 1 3 4


3 4 1 2 2 3 1 4



43. Which of the following has been arranaged in order of decreasing stability

CH+ CH- CH+


CH- CH+ CH+


CH- CH+ CH+


3323233
3332323
32323 33
CH- CH+ CH+
32323 33
44. Arrange the following acids in the decreasing order of acidity CH3COOH FCH2COOH
ClCH2COOH BrCH2COOH

I II III IV II III I IV


II III IV I IV III II I


45. During the reaction
.PO5
2.
CH CONH ..CH CN
32 3
The hybridization state of carbon changes from

sp3 to sp sp3 to sp2


sp2 to sp3 sp2 to sp


46. Which of the following is not a nucleophile

CN- OH-


NH3 BF3


Ni
47. The reaction, H C =CH ....o ..CH -CH is called
2 22 33
250-300 C

Wurtz reaction Kolbe's synthesis


Wulf-Kishner reduction Sabatier and Senderen's reaction



48. In the presence of a peroxide, which of the following hydrogen halide undergoes addition reaction with propene in an anti-Markovnikov fashion

HF


HBr


49. But-2-yne is allowed to react with H2formed is

cis-but-2-ene


butane



HCl


HI


in the presence of Lindlar catalyst. The major product

trans-but-2-ene


mixture of cis and trans but-2-ene


50. 2-Bromopentane on heating with sodium ethoxide in ethanol gives the following major product

pent-1-ene cis-pent-2-ene


trans-pent-2-ene mixture of cis and trans-pent-2-ene


51. Trans-but-2-ene Br2 gives
CH CH
3
H

Br
Br H
H
Br Br H
CH3 CH3
CH (D) CHCH
3 33
Br
H H
Br + Br H
H
Br H
Br H Br
CH3 CH3 CH3
52. Which of the following is the most stable alkene

R2C CR2 R2C CHR


R CH CH2 H2C CH2


53. The increasing order of reactivity of halides, ethyl chloride isopropyl chloride ter-butyl chloride in SN1 reactions is

I III II I II III


I II III I III II


54. Which of the following reagents can convert acetic acid into ethanol

Sn HCl H2 Pt


LiAlH4 ether H2 Ni


55. An organic compound is oxidized by using acidified K2Cr2O7. The product obtained reacts with phenyl hydrazine but does not give silver mirror test. The possible structure of is
CHCOCH(B) (CH)CHOH
33 32
CH3CH2CH2 OH CH3CHO
56. The alcohol which gives the most stable carbocation during dehydration is

2-methyl-1-propanol 2-methyl-2-propanol


1-butanol 2-butanol


57. The most stable conformation of 1,2-dimethylcyclohexane is

Diequatorial-trans-1,2-dimethylcyclohexane


Diaxial-trans-1,2-dimethylcyclohexane


Equatorial-axial-cis-1,2-dimethylcyclohexane


Boat conformation


58. Clevage of ether linkage takes place by concentrated acids. The reactivity of acids decreases in the order

HI HBr HCl HCl HBr HI


HBr HI HCl HBr HCl HI


59. The reactivity of alcohols with the Lucas reagent decreases in the order

Allyl alcohol Secondary alcohol Primary alcohol


Secondary alcohol Allyl alcohol Primary alcohol


Primary alcohol Secondary alcohol Allyl alcohol


Secondary alcohol Primary alcohol Allyl alcohol



60. No. of acidic hydrogen in 1-butyne

4
61. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH gives

Sodium benzoate and methyl alcohol


Sodium formate and benzyl alcohol


Sodium formate, benzyl alcohol and methyl alcohol


Soidum benzoate, benzyl alcohol and methyl alcohol


62. The appropriate reagent for the transformation
O CH2 CH3
C

CH3
is


HO
HO

LiAlH4 NH2NH2, KOH


H2/Ni NaBH4


63. For obtaining butan-2-one from acetyl chloride which of the following reagents can be used

CH3CH2MgBr CH3CH2Li


(CH3CH2)2CuLi Na in dry ether


64. To distinguish between 2-pentanone and 3-pentanone, which reagent can be used
NaOH/I (B) K2Cr2O7
2
Zn Hg, HCl LiAlH4
65. A carbonyl compound reacts with HCN to form cyanohydrin which on hydrolysis forms a racemic mixture of d-hydroxy acid. The carbonyl compound is

acetone formaldehyde


diethyl ketone acetaldehyde


66. When H2C CH COOH is reduced with LiAlH4, the compound obtained will be

CH3CH2COOH CH3CH2CHO


CH3CH2CH2 OH H2C CHCH2 OH


67. Butanoic acid when reacted with bromine in the presence of phosphorus forms

CH3 CH2 CH COOH
Br



CH3 CH2 CH2 COBr


68. In the reaction . The product X is
CH3 CH
3
CH3 C CN CH
32 CH
3
CH3 CH3 CH3
CH C -CN CH C =CH CH3 -CH -CH2 -CN
3
32
CH

3
69. The best method to prepare cyclohexane, from cyclohexanol is by using

Conc. HCl ZnCl2 Conc. H3PO4


HBr Conc. HCl


70. The decreasing order of basicity of amines as follows
NH> CH NH (CH)NH
3 323233

(CH)NH CHNH NH


(CH)NH CHNH NH


(CH)NH CHNH NH


3332323
3232333
3232333
71. The reaction of CHCl3 with alcoholic KOH and P-toluidine forms
CH3
CN CH3
N2Cl


CH


NC CH
NH
3
3
2
CHO


72. In the following reaction
3 conc. H2SO4
X
The structure of major product X is
O2N



O
O N
N H
H

NO2
NO2



O
O NO2N NH H


N+2Cl-

OH
73.
Reagent
heat
The reagent is

H3PO2, H2O H2O,


Cu/HCl NaNO2, HCl


74. Products of the following reaction are
KMnO4, KOH
CH C =CCH CH
3 23 ........
373-383K


CH3COOH CO2 CH3COOH CH3CH2COOH


CHCHO CHCHCHO CHCOOH CHCOCH


332333
75. Diastereomers, differing in configuration about C I are called

Epimers Anomers


Enantiomers Conformers


76. The compound C CH CH on reaction with NaIO in the presence of KMnO
3234 4
gives
CHCOCH (B) CHCOCH CHCOOH
33 333
CHCOCH CHCHO CHCHO CO
333 32
77. The helix structure of proteins is stabilized by

Peptide bonds Hydrogen bonds


Disulphide bonds van der Waals forces


78. In the reaction heat

Na+ NH2

X
The product X is


NH2


NH2

no reaction
NH2
79. The number of signals obtained for cyclohexane at -70oC in NMR spectra

6
80. Which of the following structures is chiral
Br Cl
Br



Cl
Cl Cl Br Br BrCl




Cl
Br
Cl

Br
Cl

81. Which of the following is an extensive property

Pressure Volume


Temperature Density


82. Maximum work is obtained when the gas is allowed to expand

isothermally and irreversibly isothermally and reversibly


adiabatically and reversibly freely into vacuum


83. The relation between equilibrium constant and standard free energy is
.Go RT ln K .Go RT log k
K e-.Go/2.303 RT
.Go RT ln K
84. The free energy change with change of pressure and temperature is given by equation

dG VdP SdT dG SdT VdP


dG VdP SdT dG dH TdS


85. A reaction is non-spontaneous when

.H is .S is +ve .H is .S is -ve


.H is .S is -ve .H is .S is +ve


86. The heat released when NH4OH and HCl neutralise is

13.7 Kcal >13.7 Kcal


<13.7 Kcal None of these


87. The ratio of the rate of diffusion of He and CH4 under identical conditions of pressure and temperature is

1 0.5
88. At high pressure, the van der Waals' equation is written as

a/V2m) (Vm RT PV m RT a/Vm


PVm RT Pb PV m RT


89. Out of given concentrations terms which is the best way to represent the concentration normality, molarity, ppm, molality

Normality Molarity


Ppm Molality


90. At 10oC, the osmotic pressure of urea solution is 500 mm. The solution is diluted and the temperature is raised to 25oC. The osmotic pressure of dilute solution is 105.3 mm at 25oC. The extent of dilution can be shown as (Vi and Vf are initial and final volumes of solution)

Vf Vi Vf 5 Vi


Vf Vi V 6 V


1
5 fi
91. The calomel electrode is reversible with respect to

Hg


Hg+ Cl-


92. Four Faradays of electricity was passed through aqueous solutions of AgNO3, NiSO4, FeCl3 and PbCl4 kept in four vessels using inert electrodes. The ratio of moles of Ag, Ni, Fe and Pb deposited will be

12 6 4 3 12 4 6 3


4 3 2 1 1 2 3 4


93. The decreasing order of equivalent conductance of alkalimetal halides at infinite dilution is

LiCl NaCl KCl CsCl CsCl KCl NaCl LiCl


KCl CsCl NaCl LiCl LiCl KCl NaCl CsCl


94. The pH of 10-8 molar solution of HCl in water is

between 7 and 8 between 6 and 7
95. The pH of a solution of the salt of weak acid and weak base is given by
1 1
pH (PK w PKa log pH (PKw PKa PKb)
2 2
pH 1 (PKw -PKb -logc) pH 1 (PKw PKa PKb)
2 2
96. The solubility of a sparingly soluble metal halide MX2 in water is 1 × 10-4 M. Its solubility product is

1 × 10-8 M3 1 × 10-4 M3


4 × 10-12 M3 1 × 10-12 M3



97. A standard hydrogen electode has zero electrode potential because

Hydrogen is easiest to oxidise


The electrode potential is assumed to be zero


Hydrogen atom has only one electron


Hydrogen is lightest element


98. For a reversible reaction if the concentrations of the reactants are doubled at a definite temperature, then equilibrium constant will

be doubled become half


become one-fourth remain the same


99. Variation of K with temperature as given by Van't Hoff equation can be written as
K2 .H
.

.

11





(A)log
..

..

K 2.303
1
TT
12
K .H
2
.

.

11





log


K 2.303
1
..

..

TT
21
K .H
2
.

.

11





log

..

..

K 2.303
1
TT
21
The equilibrium does not depend on temperature
100. The equilibrium constant of the reaction 2HI(g) is 50. If the volume of the container is reduced to one half of its original volume, the equilibrium constant will be
25 50
75 100
101. Rate of physical adsorption increases with
decrease in temperature increase in temperature
decrease in pressure decrease in surface area

102. Which of the following graph represent adsorption isostere


Temperature
Pressure
Amount of gas
Temperature

adsorbed per gm









Amount of
Temperature

gas adsorbed




Volume Pressure
103. The role of a catalyst in a reversible reaction is to

increase the rate of forward reaction


increase the rate of backward reaction


alter the equilibrium constant of a reaction


allow the equilibrium to be achieved quickly


104. The enzyme is completely ineffective temporarily

at very high temperature at extremely low temperature


during chemical reaction under atmospheric pressure


105. Fog is a colloidal solution of

gas in a liquid liquid in a liquid


liquid in a gas solid in a gas


106. Which is called micelle

AS2O3 sol Na2CO3 solution


Sodium stearate concentrated solution Sb2S3 sol


107. In the coagulation of a positive sol, the coagulation power of K2SO4 Na3PO4 and NaCl is in the order

I II III IV II I III IV


III II I IV IV I II III



108. To separate and identify the ions in a mixture that may contain and Mg2+. Use the reagents H2S, HCl and NaOH. They should be added in the order

HCl, H2S, NaOH H2S, HCl, NaOH


HCl, NaOH, H2S NaOH, H2S, HCl


109. The most important buffer in the blood consists of

HCl and Cl- H2CO3 and HCO-3


H2CO3 and Cl- HCl and HCO-3


110. In the first order reaction, the concentration of the reactants is reduced to 25% in one hour. The half life period of the reaction is

2 hrs 4 hrs


1/2 hr 1/4 hr


111. The temperature dependence of rate constant of a chemical reaction is written in terms of Arrhenius equation K Ae-Ea/RT. Activation energy of the reaction can be calculated by plotting
1
log K vs T logKvs
T 1K vs
K vs T log T
112. Consider the chemical reaction,
3H2(g) . 2NH3(g) The rate of reaction can be expressed in terms of time derivative of concentration of NH3(g).
1 1 d(NH3)
Rate
dt 3dt 2dt


22 3
Rate 3 2
dt dtdt
1d(NH)

22 3
Rate
dt 3dt 2dt

22 3
Rate
dt dtdt
113. For a zero order reaction the plot of concentration of reactant versus time is





Concentration
Concentration
Concentration
Concentration


Time
Time







Time Time


114. For water system in the phase diagram, degree of freedom at triple points is

3
115. The temperature at which a compound melts into a liquid of the same composition as the solid is called the

congruent melting point incongruent melting point


peritectic temperature metastable point


116. If the concentration of CrO2-ions in a saturated solution of silver chromate is 2 × the
4
solubility product of silver chromate is

4 × 10-8 8 × 10-12


16 × 10-12 32 × 10-12


117. The rate constant for the reaction 2NO. 4NO O is 3.0 × 10-5sec-1. If the rate is
25 22

2.4 × 10-5 M sec-1, then the concentration of N2O5(in is
1.4 1.2
0.04 0.8
TDC-41587-A 20

118. The root mean square velocity of one mole of a monoatomic gas having molecular mass M is µrms. The relation between the average kinetic energy of the gas and µrms is 3E
2E
µrms

µrms

2M 3M 2E E
µrms
µrms

M 3M
119. Aluminium oxide may be electrolysed at 1000oC to furnish Al metal (atomic mass 27 amu). The cathode reaction is Al3+ 3e . Al. How much electricity is required to prepare 5.12 kg of Al by this method

5.49 × 107 coulomb 1.83 × 107 coulomb


5.49 × 104 coulomb 5.49 × 1010 coulomb


120. For which change .H ..U


2HI(g) HCl(aq) NaOH(aq) . NaCl(aq) H2O(l) CO2(g) 3H2(g) . 2NH3(g)

ROUGH WORK


ROUGH WORK


ROUGH WORK