- 1. UPSEEPAST PAPERCHEMISTRY- UNSOLVED PAPER - 2005
2. SECTION I Single Correct Answer Type There are five parts in
this question. Four choices are given for each part and one of them
iscorrect. Indicate you choice of the correct answer for each part
in your answer-book bywriting the letter (a), (b), (c) or (d)
whichever is appropriate 3. 01 Problem Which of the following
concentration units is independent of temperature ? a. Normality b.
Morality c. Formality d. Molality 4. 02 Problemx In the reaction R
C N 4(H) RCH2NH2 X can be : a. LiAlH4 b. H2SO4 c. Ni d. 2KBr 5. 03
Problem At a given temperature the equilibrium constant for the
reaction of : PCl 5 PCl3 + Cl2 is 2.4 x 10-3. At the same
temperature, the equilibrium constant for the reaction PCl3(g) +
Cl2(g) PCl5(g) is : a. 2.4 x 10-3 b. -2.4 x 10-3 c. 4.2 x 102 d.
4.8 x 10-2 6. 04 Problem Which of the following is called
polyamide? a. Terylene b. Rayon c. Nylon d. Orlon 7. 05 Problem For
the gaseous reaction C2H4 H2 C2H6 , H 130 kJ mol-1 carried in a
closed vessel, the equilibrium concentration of the c2H6 can
definitely be increased by : a. Increasing temperature and
increasing pressure b. Decreasing temperature and increasing
pressure c. Increasing temperature and pressure both d. Decreasing
temperature and increasing pressure 8. 06 Problem The number of
electrons in the valence shell of sulphur in SF6 is : a. 12 b. 10
c. 8 d. 11 9. 07 Problem The minimum energy required for the
reacting molecules to undergo reaction is : a. Potential energy b.
Kinetic energy c. Thermal energy d. Activation energy 10. 08
Problem The only non-metal which is liquid at ordinary temperature
is : a. Hg b. Br2 c. NH3 d. none of these 11. 09 Problem Which of
the following is correct for the reaction N2(g) + 3H2(g) 2NH3(g) a.
Kp = Kc b. Kp < Kc c. Kp > Kc d. Pressure is required to
predict the correlation 12. 10 Problem The rate constant of a first
order reaction is 6.9 x 10-3 s-1. How much time will it take to
reduce the initial concentration to its 1/8th value ? a. 100 s b.
200 s c. 300 s d. 400 s 13. 11 Problem Which has the minimum
freezing point ? a. One molal NaCl aq. Solution b. One molal CaCl2
aq. Solution c. One molal KCl aq. Solution d. One molal urea aq.
Solution 14. 12 Problem sp3 d hybridization results in : a. a
square planar molecule b. an octahedron molecule c. a trigonal
biyramidal molecule d. a tetrahedron molecule 15. 13 Problem The
compound having the lowest oxidation state of iron is : a.
K4Fe(CN)6 b. K2FeO4 c. Fe2O3 d. Fe(CO)5 16. 14 Problem Among the
following, the most acidic is : a. CH3COOH b. ClCH2COOH c.
Cl2CHCOOH d. Cl2CHCH2COOH 17. 15 Problem Rutherfords experiment on
the scattering of -particles showed for the first time that the
atom has : a. Electrons b. Protons c. Nucleus d. Neutrons 18. 16
Problem For a Bohr atom angular momentum M of the electron is : (n
= 0, 1, 2, .)nh2 a.4n2h2 b. 4 nh2 c. 4nh d.4 19. 17 Problem An
example of dispersion of a liquid in a gas is : a. Milk b.
Vegetable oil c. Foam d. Mist 20. 18 Problem Which of the following
combination will form an electrovalent bond ? a. P and Cl b. NH3
and BF-3 c. H and Ca d. H and S 21. 19 Problem How many moles of
Al2(SO4)3 would be in 50 g of the substance ? a. 0.083 mol b. 0.952
mol c. 0.481 mol d. 0.140 mol 22. 20 Problem Teflon polymer is
formed by polymerization of a. CH2 = CH CN b. F2C = CF2 c. Cl2C =
CH2 d. H2C = CHCl 23. 21 Problem The IUPAC name of the compound
CH2CONHBr is : a. 1-bromoacetamide b. ethanoylbromide c.
N-bromoethanmide d. None of the above 24. 22 Problem Which of the
following is a condensation polymer ? a. b. Rubber c. Polyvinyl
chloride d. Polyethylene 25. 23 Problem The solubility of CaF2 in
pure water is 2.3 x 10-4 mol dm-3. Its solubility product will be :
a. 4.6 x 10-4 b. 4.6 x 10-8 c. 6.9 x 10-12 d. 4.9 x 10-11 26. 24
Problem Copper sulphate solution, when added to an excess of
ammonium hydroxide, forms a complex compound due to : a.
[Cu(NH3)2]2+ b. [Cu(NH3)4]2+ c. [Cu(NH3)6]2+ d. Cu2+ 27. 25 Problem
If a solution containing 0.072 g atom of sulphur in 100 g of a
solvent (kf = 7.0) gave a freezing point depression of 0.840C, the
molecular formula of sulphur in the solutions is : a. S6 b. S7 c.
S8 d. S9 28. 26 Problem Which of the following is a dynamic
isomerism ? a. Metamerism b. Geometricla isomerism c. Tautomerism
d. Co-ordinate isomerism 29. 27 Problem When K2Cr2O7 is converted
into K2CrO4, the change in oxidation number of chromium is : a. 0
b. 5 c. 7 d. 9 30. 28 Problem Which of the following will be most
effective in the coagulation of Fe(OH)-3 sol ? a. KCN b. BaCl2 c.
NaCl d. Mg3(PO4)2 31. 29 Problem For d block elements the first
ionization potential is of the order : a. Zn > Fe > Cu >
Cr b. Sc = Ti < V = Cr c. Zn < Cu < Ni < Co d. V >
Cr > Mn > Fe 32. 30 Problem In (+) glucose the number of
chiral centers is : a. 4 b. 6 c. 0 d. 5 33. 31 Problem Mohr salt is
made up of which combination of salt ? a. Ammonium sulphate and
potash b. Ammonium sullphate and ferrous sulphate c. Ammonium
sulphate and copper sulphate d. Ammonium sulphate and magnesium
sulphate 34. 32 Problem High basicity of Me2NH relative to Me3N is
attributed to : a. Effect of solvent b. Inductive effect of Me c.
Shape of Me2NH d. Shape of Me3N 35. 33 Problem Which is the correct
order of electronegativity ? a. F > N < O > C b. F > N
> O > C c. F > N > O < C d. F < N < O = C 36.
34 Problem In the reaction X is : a. SiC b. H2SO4 c. KMnO4 d.
Fe/HCl 37. 35 Problem In Grignard reagent the carbon-magnesium bond
is : a. Electrovalent b. Covalent c. Dative d. Hydrogen bonding 38.
36 Problem The radius of hydrogen atom in the ground state is 0.53
. The radius of Li2+ ion (atomic number = 3) in a similar state is
: a. 0.176 b. 0.30 c. 0.53 d. 1.23 39. 37 Problem Tyndall effect
shown by colloids is due to : a. Scattering of light by the
particles b. Movements of particles c. Reflection of light by the
particles d. Coagulation of particles 40. 38 Problem Iodine is : a.
Electrovalent solid b. Atomic solid c. Molecular solid d. Covalent
solid 41. 39 Problem Fe2+ ion is distinguished from Fe3+ ion by :
a. BaCl2 b. KCN c. NaNO3 d. NH4SCN 42. 40 Problem Among the
following, the monosaccharide is: a. Cellulose b. Starch c.
Fructose d. Sucrose 43. 41 Problem Lattice energy of a solid
increases if : a. Size of ions are small b. Charges of ions are
small c. Ions are neutral d. None of the above 44. 42 Problem Which
of the following will not give a positive iodoform test ? a.
CH3CH2CHOHCH3 b. CH3CH2CH2COCH3 c. CH3CH2COCH2CH3 d. CH3COC6H5 45.
43 Problem The reason for the loss of optical activity of lactic
acid when OH group is changed by H is that : a. Chiral centre of
the molecule is destroyed b. Molecules acquires asymmetry c. Due to
change in configuration d. Structural changes occurs 46. 44 Problem
To distinguish between salicylic acid and phenol one can use : a.
NaHCO3 solution b. 5% NaOH solution c. neutral FeCl3 d. bromine
water 47. 45 Problem C - H bond energy is about 101 kcal/mol for
methane, ethane and other alkanes but is only 77 kcal/mol for C H
bond of CH3 in toluene. This is because : a. of inductive effect
due to CH3 in toluene b. of the presence of benzene ring in toluene
c. of resonance among the structures of benzyl radical in toluene
d. aromaticity of toluene 48. 46 Problem In a 1st order reaction,
reactant concentration C varies with time t as : a. 1/C increases
linearly with t b. log C decreases linearly with t c. C decreases
with 1/t d. log C decreases with 1/t 49. 47 Problem Which of the
following ions can be replaced by H+ ions when H2 gas is bubbled
through the solutions containing these ions ? a. Li b. Ba2+ c. Cu2+
d. Be2+ 50. 48 Problem Among BMe3, BF3, BCl3 and B2H6 which one
will be the best Lewis acid ? a. BCl3 b. BMe3 c. B2H6 d. BF3 51. 49
Problem Alum is added to muddy water because : a. It acts as
disinfectant b. It results in coagulation of clay and sand c. Clay
is soluble in alum, hence removes it d. It makes water alkaline,
which is good for health 52. 50 Problem NH3 gas is dried over : a.
CaO b. NHO3 c. P2O5 d. CuSO4 53. 51 Problem Which one of the
following is not correct for an ideal solution ? a. It must obey
Raoluts law b. H = 0 c. C = 0 d. H V0 54. 52 Problem Borax bead
test of Cr(chromium) is : a. Green b. Blue c. Violet d. Brown 55.
53 Problem A catalyst : a. Lowers the activation energy b. Change
the rate constant c. Change the product d. Itself destroys in the
reaction 56. 54 Problem Which of the following is cross-linked
polymer ? a. Teflon b. Orlon c. Nylon d. Bakelite 57. 55 Problem
The IUPAC name of CH3 CH2 CHO: a. Propanal-1 b. 2-ethylbutanal c.
butanal-1 d. pentanal-1 58. 56 Problem in the reaction sequence :
products Products will be : a. CH3COCH3 b. CH3COCH2OH c. CH3COOH +
HCOOH d. CH3CHO + HCHO 59. 57 Problem The conditions for
aromaticity is : a. Molecule must have clouds of delocalised
electrons b. Molecule must contain (4n + 2) electrons c. Both a and
b d. None of the above 60. 58 Problem Vinyl chloride undergoes : a.
Only addition reaction b. Only elimination reaction c. Both a and b
d. Substitution reactions 61. 59 Problem Which of the following
increases the octane number ? a. Branching of chain b. Absence of
double and triple bond c. Non-cyclic alkanes d. None of the above
62. 60 Problem Ethyl alcohol can be prepared from Grignard reagent
by the reaction of : a. HCHO b. R2CO c. RCN d. RCOCl 63. 61 Problem
Chlorobenzene gives aniline with : 1. NH3/Cu2O 2. NH3/H2SO4 3.
NaNH2 4. None of these 64. 62 Problem In CsCl type structure the
co-ordination of Cs+ and Cl- are : a. 6, 6 b. 6, 8 c. 8, 8 d. 8, 6
65. 63 Problem Hesss law is used to calculate : a. Enthalpy of
reaction b. Entropy of reaction c. Work done in reaction d. All of
the above 66. 64 Problem Which of the following is not a Lewis base
? a. NH3 b. H2O c. AlCl3 d. None of these 67. 65 Problem Allene
(C3H4) contains : a. One double bond, one triple bond and one
single bond b. One triple and two doubled bonds c. Two triple and
one double bond d. Two double and four single bond 68. 66 Problem
Active charcoal is a good catalyst because : a. Made up of carbon
atoms b. Is very reactive c. Has more adsorption power d. Has inert
nature toward reagent 69. 67 Problem H2 cannot be displaced by : a.
Li+ b. Sr2+ c. Al3+ d. Ag+ 70. 68 Problem Which of the following is
amphoteric ? a. V2O3 b. CuO c. V2O5 d. NiO 71. 69 Problem The emf
of the (E zn2 / zn0.76 V )Zn / Zn2 (1M ) || Cu2 (1M )Cu (ECu2 / Cu
0.34 V ) cell, will be : a. + 1.10 V b. - 1.1.0 V c. + 0.42 V d. -
0.41 V 72. 70 Problem Which of the following is correct number of
carbon atom present as the constituent of kerosene oil ? a. C10 C16
b. C4 C6- c. C8 C16 d. C12 C18 73. 71 Problem Plaster of Paris is a
white powder of formula :1 a. CaSO4 . 2 H2O b. CaSO4 . 2H2O c.
CaSO4 . H2O3 d. CaSO4 . 2 H2O 74. 72 Problem Water possesses a high
dielectric constant, therefore : a. It always contains ions b. It
is a universal solvent c. Can dissolve covalent compounds d. Can
conduct electricity 75. 73 Problem Ribose is an example of : a.
Ketohexose b. Disaccharide c. Pentose d. Polysaccharide 76. 74
Problem Aldehydes can be oxidized by : a. Tollens reagent b.
Fehling solution c. Benedict solution d. All of the these 77. 75
Problem The for CO2(g), CO(g) and H2O(g) are 393.5, - 110.5 and
241.8 kJ/mol respectively. The standard enthalpy change (in kJ) for
the reaction CO2(g) + H2(g) CO (g) is : a. 524.1 b. 41.2 c. - 262.5
d. - 41.2 78. FOR SOLUTIONS VISIT WWW.VASISTA.NET
