KUET 2023 Question Paper M.Sc. Chemistry

FOR KUET EXAM PREPARATION

KUET 2023
Question Paper · M.Sc.
Chemistry
EXAM YEAR TYPE SUBJECT

KUET 2023 Question Paper M.Sc. Chemistry

Notes · Sample Papers · Previous Year Papers · Mock Tests

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Sr. No. .............................

ENTRANCE TEST-2023
SCHOOL OF PHYSICAL & MATHEMATICAL SCIENCE

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CHEMISTRY
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Question Booklet Series

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Total Questions : 60

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Time Allowed : 70 Minutes Roll No. :

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g l Instructions for Candidates :
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3. All entries in the OMR Answer Sheet, including answers to questions, are to be recorded in the Original

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Copy only.

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1. What Geometries SNF3 and XeO2F2 molecules 6. In the structure of Pyrophosphate molecule
have as per covalent bonding pattern ? (H4P2O7) we have :
(A) Square planar both (A) Three P=O bonds
(B) Tetrahedral both (B) Two P=O bonds and one POP bride type
(C) Square planar and trigonal bipyramidal bond
(D) Tetrahedral and trigonal bipyramidal (C) One P=O bond and two POP bridge type
2. Match the hydride with its general property : bond
a. NaH I. Polymeric Chain (D) Only POH, POP and none P=O
b. BeH2 II. Interstitial hydride 7. The incorrect pair among the following is :
c. Hf H2.10 III. Tricapped trigonal prism (A) Iron (II); Carbonic anhydrase
2–
d. [TcH9] IV. Saline hydride (B) Iron storage; Ferritin
(A) a–IV, b–II, c–III, d–I (C) Cadmium toxicity; Metallothoniens
(B) a–I, b–IV, c–II, d–III (D) Cytochrome 450; Monooxygenase
(C) a–IV, b–I, c–II, d–III 8. In case of ClF3 molecule, the incorrect statement
(D) a–IV, b–I, c–III, d–II is :
3. The observed enthalpies of hydration of divalent (A) 19
F NMR shows non-equivalent Fluorine’s
cations follows the order :
(B) Bent’s rule is followed in T shape
(A) Mn2+ < Ca2+ > Zn2+
(C) Di axial lone pair position gives highest
(B) Zn2+ > Ca2+ > Mn2+
energy
(C) Mn2+ > Zn2+ > Ca2+
(D) Two Fluorine distances are short and one
(D) Zn2+ > Mn2+ > Ca2+ long
4. The screening constant and effective nuclear
9. The choice of bridging group in case of Aluminium
charge for 4s electron of copper respectively
dimmers can be :
are :
(A) Br – > Ph > CH3
(A) 2.2 and 26.8
(B) Br – < Ph < CH3
(B) 26.8 and 2.2
(C) Br – < CH3 < Ph
(C) 2.95 and 26.05
(D) Ph > CH3 > Br –
(D) 26.05 and 2.95
5. Pick the odd one out for intermolecular hydrogen 10. Which of the following non-metal systems have
bonding : been referred to as one dimensional conductors ?

(A) Acetic acid (A) Phosphonitrilic halides
(B) Ortho nitrophenol (B) Polyphosphazenes
(C) Meta nitrophenol (C) Polythiazyls
(D) Ortho boric acid (D) Polyphosphates

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11. Match the Boron hydride compounds to their 15. Identify the correct match for Titration indicator :
correct styx and topology : Titration Indicator
I. B5H9 i. 4120, nido I. Ni2+ with EDTA a. Murexide
II. B4H10 ii. 4012, arachno II. Cl– with Ag+ b. Potassium chromate
iii. 4012, nido III. Fe2+ with Ce4+ c. Ferroin

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iv. 4120, arachno IV. NH4OH with HCl d. Methyl orange

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(A) I–i, II–ii e. Methyl red

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(A) I–a; II–b; III–c; IV–d

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(B) I–iii, II–iv

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(B) I–a; II–b; III–c; IV–e

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(C) I–iv, II–iii

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(D) I–ii, II–i (C) I–c; II–b; III–a; IV–d
12. Identify the incorrect match for stabilization of (D) I–b; II–c; III–a; IV–e
unusual oxidation of metal : 16. From the given solubility product {Ksp} values,
pick the most appropriate precipitating agent for
(A) Fe2+, OH–
Ca 2+ ions in solution :
(B) Cu+, soft sulphur donor thiourea
CaSO4 = 2.4 × 10–5; CaCO3 = 4.5 × 10–9;
(C) Co3+, EDTA
3+ –
Ca(OH)2 = 6.5 × 10–6; CaCl2 = 1.57 × 10–3
(D) Cu , hard F ions

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(A) Na2SO4

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13. Which of the following lanthanide (III) ion has

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(B) Na2CO3

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considerably different calculated and observed
(C) NaOH

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magnetic moment for its aqua complex ?

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(D) NaCl

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(A) Ce3+
17. For estimating total chloride content of 30 mL of
(B) Pr3+
0.01 M solution of [Co(NH3)5Cl]Cl2 complex as
(C) Eu3+ silver chloride, the volume of 0.1 M AgNO3
(D) Yb3+ required for complete precipitation will be :
14. The peculiar properties of lanthanide (III) ion (A) 3 mL
compounds are : (B) 6 mL
(A) Coordination numbers > 6 and sharp f-f (C) 5 mL
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transitions

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(D) 9 mL

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(B) Coordination numbers > 6 and sharp d-d 18. The complexes of which of the following inner

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transitions transition metal ion are commonly used as MRI
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las (C) Coordination numbers < 6 and sharp f-f
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(Magnetic Resonance Imaging) contrast agents ?

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(D) Octahedral geometry, broad electronic
(A) Gd
(B) Eu2+
transitions and mostly spin only magnetic (C) Lu3+
moment (D) Gd3+

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19. In the chelation therapy method of treating harmful 24. A gas cannot be liquefied whatever the pressure
effects of metal ions in humans, the ligands used is only above its :
to treat excess of iron and copper ions are :
(A) Boyle temperature
(A) Penicillamine
(B) Penicillamine & deferoxamine respectively (B) Inversion temperature
(C) Deferoxamine & Penicillamine respectively (C) Critical temperature
(D) BAL (2,3-Dimercaprol) (D) Room temperature
20. Which of the following complexes obey
25. A compound decomposes according to the first
18-electron rule with overall charge zero ?
order rate law with a half life period of 30 min.
(Considering ( 5–C H ) as 6 electron donor
5 5
ligand) What will be the percentage of the remaining
(A) (5–C5H5)Fe(CO)2 compound after 120 min ?
(B) (5–C5H5)Mo(CO)3 (A) 62.5%
(C) ( –C5H5)2Co
5
(B) 12.5%
(D) (5–C5H5)Re((6–C6H6)
(C) 6.25%
21. In van der Waal’s equation, (P–a/V2 )(V–b) = RT,
the units of ‘a’ would be : (D) 25.0%
(A) Nm2 26. Which of the following represent the law(s) of
(B) Nm4 photochemistry ?
(C) Nm–4
(A) Grothus-Draper and Stark-Einstein law
(D) Nm–2
22. Which of the following is true about the mean (B) Raoult’s and Dalton’s law
velocity (Vm), root mean square velocity (Vrms) (C) Law of mass action
and the most probable velocity (Vmp) of a gas at a
(D) Lambert’s and Beer’s law
temperature T ?
27. For a reaction A  B, the temperature dependence
(A) Vmp > Vm > Vrms
(B) Vmp < Vrms < Vm of rate constant, k, is given by log k = 8 – 103/T.
(C) Vmp > Vrms > Vm If universal gas constant, R = 8.314 J mol–1 K–1,
(D) Vmp < Vm < Vrms then the activation energy of this reaction would
23. The Miller indices of a diagonal plane of a cube be close to :
would be : (A) 8314 J/mol
(A) 110
(B) 19147 J/mol
(B) 100
(C) 200 (C) 1000 J/mol
(D) 111 (D) 120 J/mol

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28. When the two or more molecules get decomposed 32. For a reaction N 2(g) + 3H 2(g)   2NH 3(g);
by the absorption of one photon, the quantum yield H = 92.22 kJ/mol and S = –198.75 J/K-mol.
of the reaction is said to have value : At 127ºC, which of the following is true for this
reaction ?
(A) >1
(A) It is spontaneous
(B) <1
(B) It is not spontaneous

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(C) It may or may not be spontaneous

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(D) Cannot be predicted

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(D) Data is insufficient to predict its spontaneity

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29. Which of t he following st atement is/are 33. The number of phases in a two component system
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INCORRCT ?
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l absolute entropy of a substance. a
with 2 degrees of freedom would be :

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1. Second law of thermodynamics allows us (A) 1
to calculate (B) 2
2. Heat (Q) and work done (W) in (C) 3
thermodynamics are path functions. (D) 4
3. Densit y of a liquid is an ext ensive 34. If the specific conductance of a springily soluble
thermodynamic property. (1 : 1) salt in its saturated aqueous solution at
(A) 1 and 2 25ºC is 1.5 × 10 –5  –1 cm–1 ; and the ionic

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conductance for its cation and anion at infinite

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(B) 1 and 3

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dilution are 0.495 and 1.0  –1 cm2 mol–1
(C) 2 and 3

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respectively; the solubility (in mol L–1) of the salt
(D) 1,2 and 3
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in water at 25ºC is :
30. Which of the following is correct for the
a
(A) 1 × 10–6
reversible isothermal expansion of one mole of (B) 1 × 10–2
an ideal gas at a given temperature from volume (C) 2 × 10–1
V1 to V2 ? (D) 2 × 10–4
(A) Q = W =U =H = 0 35. During the conductometric titration of an acid
(B) Q = W and U =H = 0 (placed in beaker) by an alkali (taken in burrette),

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the plot between the conductance and volume of

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(C) Q = W =and U = –H

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alkali added was found to initially decrease

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(D) Q = –Wand U = H = 0

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steeply followed by a sharp increase. Which of

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31. A Carnot engine operates between 200ºC and

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the following combinations would give such a

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20ºC. Its maximum possible efficiency is :
plot ?

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(B) 100%
(A) Strong acid and strong base
(B) Weak acid and strong base
(C) 38% (C) Strong acid and weak base
(D) 72% (D) Weak acid and weak base

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36. ºm(H2O) is equivalent to : 40. When all the three principal moments of intertia
(a) ºm(HCl) + ºm(NaOH) – ºm(NaCl) of a molecule are equal, it is called :
(b) ºm(HNO3) + ºm(NaNO3) – ºm(NaOH) (A) Symmetric top
(c) ºm(HNO3) + ºm(NaOH) – ºm(NaNO3) (B) Prolate symmetric top
(d) ºm(NH4OH) + ºm(HCl) – ºm(NH4Cl) (C) Asymmetric top
(A) (a) only (D) Spherical top
(B) (a) and (d) 41. Choose the correct IR frequency of C=O of amide :
(C) (a), (c) and (d) (A) 1800 cm–1
(D) (a), (b), (c) and (d) (B) 1730 cm–1
37. If E º Fe2 / Fe   0.441V and Eº Fe3 / Fe2  0.771V, (C) 1630 cm–1
the standard EMF of the reaction, (D) 1680 cm–1
Fe + 2Fe3+  3Fe2+ 42. Choose the max of the molecule given below :
will be :
(A) 1.212 V
(B) 0.111 V
(C) 0.330 V
(D) 1.653 V (A) 215 nm
38. Which of the following molecules will not display (B) 235 nm
an infrared spectrum ? (C) 234 nm
(A) CO2 (D) 265 nm
(B) N2 43. The approximate value of methyl proton in NMR
(C) Benzene is :
(D) Both (A) and (B) (A) 1.3
39. A molecule -carotene (MW = 536 gmol–1) has (B) 1.5
lmax 450 nm and e = 15,000 m2 mol–1. Calculate
(C) 0.9
the absorbance expected for a solution in which
0.1 mg has been dissolved in 10 ml of water in a (D) 2.5
cuvette of path length 1 cm. 44. Signal splitting in NMR arises from :
(A) 2.8 (A) Shielding effect
(B) 2.8 × 10–4 (B) Spin-spin decoupling
(C) 0.28 (C) Spin-spin coupling
(D) .028 (D) Deshielding effect

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45. Which of the following is used to prepare Benzoyl 50. Which of the following factors is not responsible
chloride from benzoic acid ? for the denaturation of proteins ?
(A) Cl2, H2O (A) Heat
(B) Charge
(B) SOCl2
(C) pH change
(C) SO2, Cl2 (D) Organic solvents

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(D) Cl2, hv

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51. Which of the following is an example of

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46. Which of the following organic compound is alkaloid ?

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formed when aniline reacts with acetaldehyde ?
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(A) Diazoniumsalt
(B) Schiff ’s base
(B)
(C) Immine
(D) Carbylamine
47. In which of the following reactions lead (C)
tetraacetate is used to cleave a carbon-carbon

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bond in a glycol ?
(A) Swern oxidation
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(B) Criegee oxidation
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(C) Jones oxidation
(D) Baeyer-Villiger oxidation 52. Which one among the following carbocations has
48. Which of the following is a phospholipid ? the longest half-life ?

(A) Sterol
(B) Cholesterol
(A)
(C) Lecithin

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(D) Steroid

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49. Which of the following is an example of
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(B)

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Epimers ?

gla (B) Glucose and Galactose (C)
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(C) Galactose, Mannose and Glucose
(D)
(D) Glucose, Ribose and Mannose

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53. The major product of the below given reaction 55. Aromatic electrophilic substitution reaction
is : proceed via :
(A) Carbocation Intermediate
(B) Radical Intermediate
(C) Arinium Ion Intermediate
(D) Benzyne Intermediate
56. What is the possible intermediate formed in the
Reimer-Tiemann reaction ?
(A) (B)
(A) Carbocation
(B) Carboanion
(C) Carbene
(D) Free radicals
57. One of the possible factor of cyclopropane
instability is :
(C) (D)
(A) Torsional strain
(B) C–H bond length
54. Which among the following undergo ArSN2 (C) 60 bond angles
mechanism with ease ? (D) Due to Sp character of Carbons
58. The product of the below given reaction is :

(A)

(B) (A)

(B)

(C)
(C)

(D)
(D)

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59. The suitable electrophilic substitution on Pyridine 60. What is obtained by thermolysis of azides ?
occurs at : (A) Free radicals
(A) C–2 (B) Carbocation
(B) C–3 (C) Arene
(C) C–4 (D) Nitrene
(D) None of the above

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ROUGH WORK

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