Punjab Technical University, Jalandhar entrance exam previous year question papers

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1. Which of the following is an antibiotic ?
(A) Paracetamol (B) Aspirin
(C) Caffeine (D) Penicillin
2. Diazonium salt can be prepared by reacting nitrous acid with :
(A) Toluene (B) Phenol
(C) Aniline (D) Pyridine
3. Friedel-Craft's alkylation proceeds in the presence of :
(A) Lewis acid (B) Lewis base
(C) Peroxides (D) Sodium hydroxide
4. Oils and fats are esters formed from glycerol and :
(A) Sulphonic acids (B) Long chain aliphatic acids
(C) Aromatic acids (D) α-Amino acids
5. Acetaldehyde reacts with CH3
MgI to yield :
(A) Isopropyl alcohol (B) Ethanol
(C) Acetone (D) t-Butyl alcohol
CH3 Br O
6. The compound CH3
–CH–CH2
–CH–C–CH3
has the IUPAC name as :
(A) 3-Bromo-5-methyl-2-hexanone (B) 3-Bromo-2-heptanone
(C) 4-Bromo-2-methyl-5-hexanone (D) 3-Bromo-4-isopropyl-2-butanone
7. Which is the correct statement ?
(A) Ethanol should boil at a temperature lower than that for ethane.
(B) Ethanol is less acidic than phenol
(C) Phenol is more acidic than acetic acid
(D) Ethyne is a non-linear molecule.
8. A carboxylic acid can be converted into the corresponding anhydride using :
(A) SOCl2 (B) SO2
(C) Conc. H2
SO4 (D) P2
O5
9. The first step in the chlorination of methane in the presence of U.V. light is :
(A) Heterolytic fission of chlorine molecule (B) CñH bond cleavage
(C) Homolytic fission of chlorine molecule (D) Formation of a carbocation
10. Which is not a true statement ?
(A) Starch is a polysaccharide
(B) Sucrose is a carbohydrate
(C) Fructose and glucose don't have the same molecular formula
(D) Glucose is a monosaccharide

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Punjab Technical University, Jalandhar entrance exam previous year question papers

1. Which of the following is an antibiotic ?
(A) Paracetamol (B) Aspirin
(C) Caffeine (D) Penicillin
2. Diazonium salt can be prepared by reacting nitrous acid with :
(A) Toluene (B) Phenol
(C) Aniline (D) Pyridine
3. Friedel-Craft's alkylation proceeds in the presence of :
(A) Lewis acid (B) Lewis base
(C) Peroxides (D) Sodium hydroxide
4. Oils and fats are esters formed from glycerol and :
(A) Sulphonic acids (B) Long chain aliphatic acids
(C) Aromatic acids (D) α-Amino acids
5. Acetaldehyde reacts with CH3
MgI to yield :
(A) Isopropyl alcohol (B) Ethanol
(C) Acetone (D) t-Butyl alcohol
CH3 Br O
6. The compound CH3
–CH–CH2
–CH–C–CH3
has the IUPAC name as :
(A) 3-Bromo-5-methyl-2-hexanone (B) 3-Bromo-2-heptanone
(C) 4-Bromo-2-methyl-5-hexanone (D) 3-Bromo-4-isopropyl-2-butanone
7. Which is the correct statement ?
(A) Ethanol should boil at a temperature lower than that for ethane.
(B) Ethanol is less acidic than phenol
(C) Phenol is more acidic than acetic acid
(D) Ethyne is a non-linear molecule.
8. A carboxylic acid can be converted into the corresponding anhydride using :
(A) SOCl2 (B) SO2
(C) Conc. H2
SO4 (D) P2
O5
9. The first step in the chlorination of methane in the presence of U.V. light is :
(A) Heterolytic fission of chlorine molecule (B) CñH bond cleavage
(C) Homolytic fission of chlorine molecule (D) Formation of a carbocation
10. Which is not a true statement ?
(A) Starch is a polysaccharide
(B) Sucrose is a carbohydrate
(C) Fructose and glucose don't have the same molecular formula
(D) Glucose is a monosaccharide
11. The synthetic resin bakelite can be obtained by using the starting material :
(A) Formic acid (B) Acetic acid
(C) Formamide (D) Formaldehyde

12. Which of the following is not contributing to the environmental pollution ?
(A) Nitrogen (B) Carbon dioxide
(C) Sulphur dioxide (D) Chlorofluorohydrocarbons
13. Enzymes are biocatalysts belonging to a class of compounds known as :
(A) Alkaloids (B) Steroids
(C) Proteins (D) Polyesters
14. Aromatic sulphonic acids are important compounds for producing :
(A) Soaps (B) Rubber
(C) Nylons (D) Detergents
15. Which of the following is most basic ?
O
(A) H2
NñCñNH2 (B) C6
H5
ñNH2
O
(C) C2
H5
ñNH2 (D) C6
H5
ñCñNH2
16. The compound which cannot undergo dehydrohalogenation is :
(A) Methyl bromide (B) n-Butyl Chloride
(C) Ethyl iodide (D) Isopropyl bromide
17. Acetanilide is obtained by a reaction of aniline with :
(A) Acetone (B) Acetamide
(C) Methyl chloride (D) Acetyl chloride
18. Which of the following does not undergo Cannizzaro reaction ?
(A) Acetaldehyde (B) Formaldehyde
(C) Trichloroacetaldehyde (D) Benzaldehyde
19. The number of sigma bonds and pi-bonds in CH3
–CH=CH2
are respectively :
(A) 7, 1 (B) 8, 1
(C) 1, 8 (D) 2, 7
25. The weakest base amongst the halide ions is :
(A) Fñ (B) Clñ
(C) Brñ (D) Iñ
26. Li+ ions would form the most thermally stable compound with the anion :
(A) CO3
2ñ (B) N3
ñ
(C) ClO4
ñ (D) NO3
ñ
27. The correct sequence representing first ionization energies (in ev) of IInd period elements is
represented by :
(A) C < B (B) Be < B
(C) O < N (D) N < C
28. The carbide ion [C3
4–], present in Mg2 C3
is isoelectronic with :
(A) C2
N2 (B) CO2
(C) C2
2ñ (D) CNØ
29. An element whose hydride when reacted with water would produce H2
gas is :
(A) CsH (B) BeH2
(C) AlH3 (D) SiH4
30. The number of ione pairs on oxygen in the complex Et2
O.B F3 :
(A) 0 (B) 1
(C) 2 (D) 3
31. Which element representing the following configuration will have the highest electron affinity ?
(A) [Ne] 3s2
3p3 (B) [Ne] 3s2
3p4
(C) [Ne] 3s2
3p5 (D) [Ne] 3s1
32. Which of the following electronic configurations will represent an orbital of highest energy ?
(A) n = 3; l = 2; m = +1 (B) n = 4; l = 0; m = 0
(C) n = 3; l = 1; m = +1 (D) n = 4; l = 1; m = +1
33. The number of nodal planes in the angular wave function of px
and d
xy orbitals respectively are :
(A) 0, 1 (B) 0, 2
(C) 1, 2 (D) 1, 1
34. When O2
is ionized to form O2
+, the electron removed from the M.O. is :
(A) σ b (B) π b
(C) π * (D) σ *
35. What is the oxidation number of S in HS¯ ?
(A) ñ2 (B) ñ1
(C) +1 (D) +2

36. Which of the following alkali metal hydroxides is the strongest base ?
(A) LiOH (B) NaOH
(C) KOH (D) CsOH
37. The arrangement representing the correct sequence of increasing ionic size is :
(A) N3
ñ < O2ñ < Fñ (B) Fñ
< O2ñ < N3
ñ
(C) O2ñ < Fñ
< N3
ñ (D) Fñ
< N3
ñ < O2ñ
38. An aqueous solution of borax is :
(A) highly acidic (B) highly basic
(C) mildly acidic (D) mildly basic
39. The highest electronegativity is shown by :
(A) Carbon atom in its ground state configuration
(B) Carbon atom in sp3
hybridized state
(C) Carbon atom in sp2 hybridized state
(D) Carbon atom in sp hybridized state
40. Amongst the following, the complex ion with maximum number of unpaired electrons is : [At No. of
Mn = 25, Co = 27, Ni = 28, Cu = 29 :
(A) MnCl4
2ñ (B) CoCl4
2ñ
(C) NiCl4
2ñ (D) CuCl4
2ñ
41. How many moles of air are in the lungs of an average adult with a lung capacity of 3.8L ? Assume that
the person is at 1.00 atm pressure and has a normal body temperature of 37ºC.
(A) 0.15 mol (B) 1.5 mol
(C) 15 mol (D) 150 mol
42. The rate of diffusion of a gas is :
(A) directly proportional to its density
(B) directly proportional to its molecular weight
(C) directly proportional to square root of its molecular weight
(D) inversely proportional to square root of its molecular weight.
43. Which of the following statements about the First law of thermodynamics written as ∆ U = q + w for
a closed system, is not correct ?
(A) ∆ U of a process is independent of the path of a process
(B) q + w is not independent of the path of a process
(C) q is not independent of the path of a process
(D) w is not independent of the path of a process.
44. The enthalpy of solution of BaCl2
.2H2
O) is 2.1 kcal and the enthalpy of hydration of BaCl2
(anhydrous)
is –7.03 kcal. What is the enthalpy of solution of anhydrous BaCl2
?
(A) ñ 4.93 kcal (B) +9.13 kcal
(C) + 4.93 kcal (D) ñ9.13 kcal
. For a reaction to occur spontaneously at a given temperature and pressure :
(A) ∆ H > 0 and ∆ S < 0 (B) ∆ H < T ∆ S
(C) ∆ S < 0 (D) ∆ S > 0
46. The solubility of CaF2
(mol. wt 80) is 80 mg per litre. Its solubility product value will be :
(A) 1×10ñ9 (B) 2×10ñ9
(C) 3×10ñ9 (D) 4×10ñ9
47. Two moles of NH3
gas are introduced into a previously evacuated 1.0 litre container in which it
undergoes dissociation at high temperature
2NH3
(g) = N2
(g) + 3H2
(g)
At equilibrium 1.0 mole of NH3
(g) is left. The value of equilibrium constant, Kc
, is :
(A) 0.75 mole2
litreñ2 (B) 1.00 mole2
litreñ2
(C) 1.50 mole2
litreñ2 (D) 1.70 mole2
litreñ2
48. For the forward reaction in the equation H2
(g) + F2
(g) = 2HF(g), ∆H = –536 kJ/mol H2
and the energy
of activation = 208 kJ/mol H2
. Which of the following conclusions about the reaction is not correct ?
(A) The heat of formation of HF is ñ268 kJ molñ1
(B) The activation energy for the reverse reactions is 372 kJ per mole of hydrogen fluoride.
(C) At equilibrium, decrease in temperature increases the percentage yield of HF
(D) At equilibrium, an increase in temperature increases the percentage yield of HF
49. The Miller indices of the crystal plane which cut through the crystal axes at (2a, 3b, c) are :
(A) 321 (B) 231
(C) 123 (D) 326
50. Which of the four collegative properties is most often used for molecular mass determination ?
(A) Elevation in boiling point (B) Depression in freezing point
(C) Osmotic pressure (D) None of these
51. The molal depression constant for water is 1.86/mole kg–1. The freezing point of a solution which has
0.05 mole of urea dissolved in 250g of water is :
(A) ñ 0.372ºC (B) ñ 0.093ºC
(C) ñ 0.0372ºC (D) + 0.0372ºC
52. The specific conductance of 0.01 molar acetic acid solution at 300 K is 14.5 ×10–5 Ω–1cm–1 and the
limiting molar conductance of acetic acid at the same temperature is 290 Ω–1cm2
mol–1. The degree of
dissociation of acetic acid is :
(A) 5×10ñ1 (B) 5×10ñ2
(C) 5×10ñ3 (D) 5×10ñ7
53. Assume that the following reaction occurs in an electrochemical cell Cd(S) + Cu2+ = Cd2+ + Cu(S). The
standard electromotive εº for this cell at 25ºC is 0.7416 V. The ∆Gº for the cell reaction at 25ºC will be :
(A) ñ143.11 kJmolñ1 (B) +143.11 kJmolñ1
(C) 1.431 kJmolñ1 (D) ñ1.431 kJmolñ1
Chemistry/209101 5 [Turn over54. The ε for the following cell at 25ºC, assuming ideal solutions Zn|Zn++ (ZnSO4) (10–5M)||Zn++ (ZnSO4) (10–4M)|Zn
will be :
(A) + 0.059 (B) ñ0.059
(C) + 0.0296 (D) ñ0.0296
55. Which of the following statements concerning activation energy is TRUE ?
(A) The activation energy of a forward reaction can never be smaller than that of a backward reaction.
(B) The reaction is fast if the activation energy of a reaction is small.
(C) Reaction rates increase with temperature because the activation energy decreases at
high temperature.
(D) The uncatalysed reaction generally has a lower activation energy than the catalysed reaction.
56. Which one of the following statement for order of reaction is not correct ?
(A) Order of the reaction can be determined experimentally
(B) Order of reaction is equal to sum of the powers of concentration terms in differential rate law
(C) It is not affected with the stoichiometric coefficient of the reactants.
(D) Order of the reaction cannot be fractional.
57. The reaction 2NO(g) + 2H2
(g) →N2
(g) + 2H2
O (g) is first order in H2
and second order in NO. The rate
law is :
(A) Rate = k [NO]2
[H2
] (B) Rate = k [NO] [H2
]
(C) Rate = k [NO]
[H2
]
2 (D) Rate = k [NO]½ [H2
]
58. Lyophilic sols are :
(A) Irreversible sols (B) They are prepared from inorganic compounds
(C) Coagulated by adding electrolytes (D) Self-stabilizing
59. Emulsion are colloidal systems consisting of two immiscible liquids and stabilized by substance known
as emulsifier or emulsifying agent. The function of emulsifier is :
(A) to increase the rate of reaction
(B) to increase the surface tension between water and oil
(C) to act as a catalyst
(D) to lower the interfacial tension between oil and water.
60. For a solution, Freundlich adsorption isotherm is represented as :
(A) 1/n KC
m
x = (B) 1/n KC
x
m =
(C) n KC
m
x = (D) n KC
x
m =
where x is the weight of gas adsorbed by m gms of adsorbent at an equilibrium conc. of solute C.
K and n are characteristic constants.