GNDU 2020 Entrance Exam Question Paper M.Sc Chemistry

Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

Section 1 - M Sc - Chemistry or Applied Chemistry

1) The units of Molal Elevation constant (Kb) are
A) J K-1 mol-1

B) J mol-1

C) K kg mol-1

D) K mol-1

2) A surfactant makes micelles in water after reaching a certain concentration (10 mM) known as critical micelle
concentration (CMC). What will be the effect on the CMC value if the water also contains 50 mM NaCl in it?
A) It will increase

B) It will decrease

C) None of the above

D) It would remain the same

3) If 30 ml of methyl alcohol (ρ = 0.7980 gml-1) is mixed with 70 ml of water ((ρ = 0.9984 gml-1) at 25oC to give a solution
of ρ = 0.9575 gml-1. The molal freezing constant of water is 1.86 mol-1kg. The freezing point of solution will be
A) -109.91 oC

B) -79.91 oC

C) -49.91 oC

D) -19.91 oC

4) What is the energy of a particle (of mass m) in a 1-dimensional box (of length a) in its second excited state (n=3).
A) 4h2/9ma2

B) 9h2/4ma2

C) 9h2/8ma2

D) 4h2/8ma2

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

5) How many constitutional and cis-trans stereoisomers are there of cycloalkanes with the formula C 5H10
A) 4

B) 7

C) 5

D) 6

6) trans-dihydroxylation of alkenes can be achieved by
A) By using all above three methods

B) OsO4

C) Epoxidation followed by hydrolysis

D) KMnO4

7) A radiation of 5000 Å lies in which part of the electromagnetic spectrum?
A) IR

B) UV

C) Radio wave

D) Visible

8) The minerals having silicate chains are collectively called ………
A) Olivine

B) Zircon

C) Pyroxenes

D) Natrolite

9) A cycloaddition reaction is favoured under which of the following conditions:
A) EWG on diene and EDG on dienophile

B) EDG on both diene and dienophile

C) EWG on both diene and dienophile

D) EWG group on dienophile and EDG on diene

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

10) A process is spontaneous at all temperatures when
A) ∆H > 0, and ∆S > 0

B) ∆H < 0, and ∆S > 0

C) ∆H = 0, and ∆S < 0

D) ∆H < 0, and ∆S < 0

11) Be shows the diagonal relationship with
A) Mg

B) B

C) Na

D) Al

12) HVZ reaction is used for:
A) β–halogenation of carboxylic acids

B) α-halogenation of aldehydes

C) α–halogenation of carboxylic acids

D) β-halogenation of aldehydes

13) For two protons which are 2.438 kHz and 4.538 kHz downfield from the Reference compound on a 500 MHz (B=11.74
T) instrument, calculate the chemical shift difference between them in Hz on 300 MHz instrument.
A) 1260 Hz

B) 4.2 Hz

C) 7 Hz

D) 2100 Hz

14) On dilution of a carboxylic acid, the OH stretching frequency
A) Increases

B) Remain unaffected

C) None of the above

D) Decreases

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

15) Brass is an alloy of
A) Cu, Al and Zn

B) Cu and Ni

C) Cu, Ni and Zn

D) Cu and Zn

16) Which of the given statements is true in respect of basicity of an acid?
A) Basicity x atomic weight = Molecular weight

B) Basicity x Molecular weight = Equivalent weight

C) It is the number of replaceable H atoms in one molecule of an acid

D) It is the number of H atoms in one molecule of an acid

17) Give the type of hybridization in XeF 2
A) sp2

B) sp3 d2

C) sp3d1

D) sp3

18) The solution containing components A and B follows Raoult’s law when
A) A-B attractive force remains same as A-A and B-B

B) A-B attractive force is less than A-A and B-B

C) None of these

D) A-B attractive force is greater than A-A and B-B

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

19) The major product of the following reaction sequence is

A)

B)

C)

D)

20) Carbonyl stretching frequency is the highest in the case of
A) acids

B) anhydrides

C) aldehydes

D) amides

21) In the spectrochemical series, which ligand produces strong field?
A) H2O

B) CO

C) NH3

D) Cl-

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

22) The Purpose of an emulsifier is to
A) Improve medication taste

B) Decrease surface area in a suspension

C) Stabilize the emulsion

D) Minimize the size of globules

23) MX6 is a molecule with octahedral geometry. How many X – M – X bonds are at 180°?
A) Two

B) Four

C) Three

D) Six

24) In diborane, the two H-B-H angles are nearly:
A) 95o and 120o

B) 180o and 120o

C) 95o and 150o

D) 60o and 120o

25) A spectroscopic transition of 9 GHz would amount to how much in cm -1.
A) 3.0 cm-1

B) 0.3 cm-1

C) 0.1 cm-1

D) 1.0 cm-1

26) Chose the correct expression for the Henderson-Hasselbach equation
A) pH = pKa + log10([HA]/[ A-])

B) pH = pKa + log10([A-]/[HA])

C) pKa = pH + log10([HA]/[A-])

D) pKa = pH + log10([A-]/[HA])

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

27) Which of the following compounds is
(i) insoluble in dil. NaOH solution
(ii) On shaking with etthanolic sliver nitrate gives precipitates

A)

B)

C)

D)

28) The triple point for carbon dioxide is
A) None of the above

B) depends only on temperature

C) depends only on pressure

D) depends on both temperature and pressure

29) What is the bond order in superoxide (O2-) ion?
A) 2.5

B) 2.0

C) 1.5

D) 1.0

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

30) Reaction of nitrobenzene with concentrated HNO 3/H2SO4 at 80-100 oC forms:
A) 1,2,4-trinitrobenzene

B) 1,4-dinitrobenzene

C) 1,2-dinitrobenzene

D) 1,3-dinitrobenzene

31) Lysozyme belongs to the enzyme category of:
A) hydrolases

B) isomerases

C) peptidases

D) transferases

32) The lines in the rotational spectrum become closer as we go from OC to OCN because
A) The dipole moment increases.

B) The geometry changes.

C) The number of atoms increases.

D) All of the above.

33) For a probability distribution function

What would be the expectation value of x within the limits

A) 0

B) a/2

C) a2

D) a

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

34) The relative reactivity of benzene, aniline, toluene and nitrobenzene towards electrophilic substitution is in the order
A) Aniline > benzene > toluene > nitrobenzene

B) Aniline > toluene > benzene > nitrobenzene

C) Nitrobenzene > benzene > toluene > aniline

D) Aniline > benzene > nitrobenzene > toluene

35) What are the most important intermolecular forces in H2?
A) Dispersion forces

B) Dipole-dipole interactions

C) Electronic interactions

D) Hydrogen bonding

36) For the ground state energies of C-H and C-D bonds:
A) C-H has higher energy than C-D

B) two have equal energies

C) none of the above is correct

D) C-D has higher energy than C-H

37) The size of colloidal particles is
A) 1 nm-1000 nm

B) More than 1000 nm

C) None of above

D) Less than 1nm

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

38) In the following compound, how many peaks are expected in the NMR spectrum of Fluorine nucleus? Given that J Ha-
F=85 Hz, JHb-F=50 Hz , and JHc-F=20 Hz .

A) 6

B) 5

C) 8

D) 7

39) Overtone in IR is a result of
A) Dipole moment of the molecule

B) None of the above

C) Moment of inertia

D) anharmonicity

40) The polymeric species (SN)n is a / an
A) three dimensional conductor

B) two dimensional conductor

C) one dimensional conductor

D) insulator

41) The increase in conjugation causes
A) Bathochromic shift

B) Hyperchromic Shift

C) Hypochromic Shift

D) Hypsochromic Shift

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

42) The descending order of resonance stabilization energy of (i) naphthalene, (ii) benzene and (iii) furan is:
A) (i) < (ii) < (iii)

B) (ii) < (iii) < (i)

C) (ii) > (i) > (iii)

D) (i) > (ii) > (iii)

43) Muscarine has the configuration 2S, 3R, 5S. The correct stereochemistry of muscarine is

A)

B)

C)

D)

44) The splitting pattern for 13C NMR spectrum of CDCl3 is:
A) 3 lines of equal intensity

B) 2 lines of equal intensity

C) 4 lines of unequal intensity

D) 4 lines of equal intensity

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

45) Which oxide is amphoteric?
A) MgO

B) CaO

C) BaO

D) BeO

46) Reaction of a carbene over an alkene is a type of:
A) electrocyclic reaction

B) cycloaddition reaction

C) substitution reaction

D) rearrangement reaction

47) Of the given anions, the strongest Bronsted base is:
A) ClO2-

B) ClO3-

C) ClO-

D) ClO4-

48) Which one of the following is correct:
A) all of the above reduce nitro group

B) Zn-HCl reduces nitro group

C) Sn-HCl reduces nitro group

D) H2 over Pd-C reduces nitro group

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

49) For a Diatomic Molecule, the Vibrational quantum number and energy corresponding to Zero Point Energy are

A)

B)

C)

D)

50) Which of the ions have maximum hydration energy?
A) Be2+

B) Sr2+

C) Ca2+

D) Mg2+

51) Addition of bromine to cyclohexene gives one of the indicated products as the final product.
A) 1,2-Dibromocyclohexane (Diaxial conformer)

B) 1,1-Dibromocyclohexane

C) 1,2-Dibromocyclohexane (Diequatorial conformer)

D) 1,2-Dibromocyclohexane (Equatorial, axial conformer)

52) Bond energies for C-C, C-H, C═C, and H-H linkages are: 348, 413, 610, and 436 kJ per mole, respectively. The heat
of hydrogenation of ethylene is
A) 128 kJ

B) 2698 kJ

C) -128 kJ

D) -2698 kJ

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

53) Which is used in the manufacture of safe matchsticks?
A) Red Phosphorus

B) White phosphorus

C) Sulphur

D) Selenium

54) How many normal modes of vibration are possible for SO2
A) 3

B) 4

C) 1

D) 2

55) 2,4-DNP is commonly used for the detection of:
A) amino group

B) aldehydic group

C) phenolic group

D) amidic group

56) Joule Thomson expansion is
A) isothermal

B) isoenthalpic

C) isochoric

D) isobaric

57) Under which of the following reaction conditions, propene is converted into primary alcohol:
A) H2O/H+

B) KMnO4

C) Hg(OAc)2-H2O, NABH4

D) BH3-H2O2

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

58) Which out of phenyl ethanoate and ethyl benzoate upon reaction with HNO 3 / H2SO4 / heat give p-substituted product
as the major product?
A) None of these

B) Phenyl ethanoate

C) Both of these

D) Ethyl benzoate

59) dπ-pπ bonding is present in which molecule
A) BO33-

B) NO3–

C) CO32-

D) SO32-

60) The rate of evaporation of a liquid is faster at a higher temperature because
A) The enthalpy of vaporization is zero

B) None of the above

C) The enthalpy of vaporization is exothermic

D) The enthalpy of vaporization is endothermic

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Set Id : 60867_5 GNDU - M Sc Chemistry or Applied Chemistry

Answer Keys
Question Paper No: 60867_5

1 C 31 A
2 B 32 C
3 D 33 A
4 C 34 B
5 D 35 A
6 C 36 A
7 D 37 A
8 C 38 C
9 D 39 D
10 B 40 C
11 D 41 A
12 C 42 D
13 A 43 D
14 A 44 A
15 D 45 D
16 C 46 B
17 C 47 C
18 A 48 A
19 D 49 D
20 B 50 A
21 B 51 C
22 C 52 A
23 C 53 A
24 A 54 A
25 B 55 B
26 B 56 B
27 C 57 D
28 D 58 B
29 C 59 D
30 D 60 D

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