PU CET UG 2026 Question Paper Chemistry

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PU CET UG 2026
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Chemistry
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PU CET UG 2026 Question Paper Chemistry

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co m .
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as ag [CET-UG-26] CHEM - A
1. How many moles of electrons weigh 10 Kg?
.
(A) 6.023 x 1023 (B) x 1031 (C) x 1054 (D) x 108
. . . .

2. The normality of 0.5 M phosphorus acid (H3PO3) is
(A) 0.1 (B) 1 (C) 0.5 (D) 2
3. The angular momentum of an electron in Bohr’s third orbit is

m
co
ℎ ℎ ℎ ℎ
(A) 1.5 (B) 2.5 (C) 3 (D)

o morbitals in increasing order of energy; .
   

c
. l=0, m=0 e m
s
4. Arrange the following
m
en=4, l=0, m=0 l a
s
i. n=3,

a
l iii. n=3, l=1, m=0
ii.
a g
g
a iv. n=3, l=2, m=1
(A) iv<ii<iii<i (B) i<iii<iv<ii (C) i<iii<ii<iv (D) ii<iv<iii<i
5. Select the orbital with two radial and two angular nodes.
(A) 4f (B) 3d (C) 5d (D) 3p
6. Arrange the following electronic configurations in increasing order of their ionization energy;
3s23p1, 3s23p3, 3s2, and 3s23p4.
m
c. o
(A) 3s23p1 < 3s2< 3s23p3< 3s23p4 (B) 3s23p1 < 3s2< 3s23p4< 3s23p3

7. Select the set with isoelectronic species. se
(C) 3s2 < 3s23p1< 3s23p3< 3s23p4
m
(D) 3s23p4 < 3s23p3< 3s23p1< 3s2

g la (B) N , O , Na , F
a
3- + 2+ 2- 3- 2- + -
(A) N , Li , Mg , O
+ + 2- - - + + 2+
(C) Li , Na , O , F (D) F , Li , Na , Mg
8. The correct shape of I3- is
(A) Bent (B) T-shape (C) Trigonal planar (D) Linear
9. The incoming electron in O2 O2- is added to
(A) *2px (B) *2pz (C) 2py (D) 2px

m
10. The pair containing an odd electron and an expanded octet molecule is

m is equal to c. o
(A) SF6, H2SO4 (B) CH4, NO (C) NO, H2SO4 (D) NH3, SF6

c. 11.o U s e m
s em (C) Isochoric work (D) Isobaric work gla
(A) Adiabatic work (B) Isothermal work

gla a
a 12. The amount of heat produced in the Bomb Calorimeter during the complete combustion of
ethanol is 1364.47 KJ mol at 25C. -1
Considering the reaction,
C2H5OH (l) + 3O2 (g)  2CO2 (g) + 3H2O (l), calculate the enthalpy of combustion (R = 8.314
J K-1mol-1).
(A) -1350.50 KJ mol-1 (B) -1361.95 KJ mol-1
(C) -1366.95 KJ mol-1 (D) -1460.50 KJ mol-1

m . c
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[CET-UG-26] CHEM - A
13. Choose the conditions from following for a process to be spontaneous at all temperatures.
(A) H > 0 and S >0 (B) H < 0 and S >0
(C) H > 0 and S <0 (D) H < 0 and S <0
14. The value of Kc is 64 at 800 K for the reaction
N2(g) + 3H2(g) 2NH3(g)
The value of Kc for the reaction
2NH3(g) N2(g) + 3H2(g) is
(A) 1/64 (B) 8 (C) 1/4 (D) 1/8
15. Choose the correct option for the decreasing order of pOH of
i. 0.01 M HCl
ii. 0.01 M NaOH
iii. 0.01 M CH3COONa
iv. 0.01 NaCl
(A) i) > iv) > iii) > ii) (B) ii) > iii) > iv) > i)
(C) iii) > ii) > iv) > i) (D) i) > ii) > iv) > iii)
16. Which of the following combinations will form an acidic buffer solution
(A) Ammonium acetate and acetic acid
(B) Ammonium chloride and ammonium hydroxide
(C) Sulphuric acid and sodium sulphate
(D) Sodium chloride and sodium hydroxide
17. The oxidation number of potassium in K2O and K2O2 is
(A) +2, +2 (B) +1, +2 (C) +1, +1 (D) +1, 0
18. Which of the following is an example of a disproportionation reaction?
(A) 2KMnO4 K2MnO4 + MnO2 + O2
(B) 2NaBr + Cl2 2NaCl + Br2
(C) 2CuBr  CuBr2 + Cu
(D) 2 MnO4- + 10I- + 16H+ 2Mn2+ + 5I2 + 8H2O
19. The correct IUPAC name of the following compound is

(A) 4-methyl-6-nitro-3-oxohept-4-enal
(B) 4-methyl-2-nitro-5-oxohept-3-enal
(C) 4-methyl-5-oxo-2-nitro-hept-3-enal
(D) 6-formyl-4-methyl-2-nitro-hex-3-enal

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co m .
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as a g [CET-UG-26] CHEM - A
20. Which of the following orders is correct with respect to the stability of a free radicals?
(A) Isopropyl free radical < tertiary butyl free radical < triphenylmethyl free radical <
diphenylmethyl free radical
(B) Triphenylmethyl free radical < diphenylmethyl free radical < tertiary butyl free radical
<isopropyl free radical

m
(C) Diphenylmethyl free radical < triphenylmethyl free radical < tertiary butyl free radical <

om . co
isopropyl free radical

.c
(D) Isopropyl free radical < tertiary butyl free radical < diphenylmethyl free radical <
e m
e m
triphenylmethyl free radical
l a s
l a s a g
ag
21. Hyperconjugation involves the overlap of the following orbitals.
(A) - (B) -p (C) p-p (D) -
22. Which of the following is Lindlar’s catalyst?
(A) Dilute solution of KMnO4 (B) ZnCl2 and HNO3
(C) Sodium and liq. Ammonia (D) Partially deactivated palladised charcoal
23. Presence of a nitro group in a benzene ring
(A) Deactivates the ring towards electrophilic substitution

m
(B) Activates the ring towards electrophilic substitution

c. o
(C) Renders the ring basic

em of HBr according to the Anti-Markownikoff
(D) Deactivates the ring towards nucleophilic substitution
24. Which of the following does not give thesaddition
g la
(B) Butene a
rule?
(A) Propene (C) But-2-ene (D) Pent-2-ene
25. 8g of NaOH is dissolved in 18g of water. The mole fraction of NaOH in the solution is
(A) 0.167 (B) 0.2 (C) 0.44 (D) 2.25
26. Calculate the solubility of a gas in water at 300K and 500 torr partial pressure is 0.01gL -1. The
solubility at 750 torr partial pressure is
(A) 0.0075 gL-1 (B) 0.015 gL-1 (C) 0.005 gL-1 (D) 0.02 gL-1

m
m c. o
27. Which of the following is correct if liquids X and Y form an ideal solution?

c. o m
(A) Entropy of mixing is zero

s e
em a
(B) Free energy of mixing is zero

s g l
la
(C) Free energy and entropy of mixing are zero

g
(D) Enthalpy of mixing is zero a
a 28. Choose the correct increasing order of equivalent conductance at infinite dilution of LiCl, NaCl
and KCl.
(A) LiCl>NaCl>KCl (B) KCl>LiCl>NaCl
(C) KCl>NaCl>LiCl (D) NaCl>KCl>LiCl
29. Which of the following is applied in galvanization?
(A) Zn (B) Pb (C) Cu (D) Cr

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[CET-UG-26] CHEM - A
30. Calculate the EMF of the cell oxidation, Zn + Fe 2+ Fe + Zn2+, if the standard potentials, E,
for the half reactions are as
Zn  Zn2+ + 2e- ; E = +0.76 V
Fe  Fe2+ + 2e- ; E = +0.41 V
(A) +0.35 V (B) -0.35 V (C) +1.17 V (D) -1.17 V
31. The conductance in molten NaCl is due to
(A) Free electrons (B) Free ions (C) Free molecules (D) Na and Cl atoms
32. The unit of rate constant for a reaction with order n is
(A) Mol1-nL1-ns-1 (B) Mol1-nLn-1s-1 (C) Mol1-nL1ns-1 (D) Mol1-nL2ns-1
33. For a reaction, A + B  Products, the rate law is given by the expression k[A][B]. If the
concentration of B is increased from 0.1 to 0.3 mole, keeping the value of A at 0.1 mole, what
will be the rate constant?
(A) 3k (B) 9k (C) k/3 (D) k
34. For a reaction A + 2B  C, rate is given by R = [A][B]2 then the order of reaction is
(A) 3 (B) 6 (C) 1 (D) 2
35. The spin-only magnetic moment of Ni2+ in aqueous solution would be
(A) 0 (B) 4.9 (C) 2.84 (D) 1.73
36. Which of the following outer electronic configurations would achieve the highest oxidation
state?
(A) (n-1)d8ns2 (B) (n-1)d5ns1 (C) (n-1)d5ns2 (D) (n-1)d3ns2
37. In the following pairs, the one in which both the transition metal ions are colourless is
(A) Sc3+, Zn2+ (B) V2+, Ti3+ (C) Zn2+, Mn2+ (D) Ti4+, Cu2+
38. The outer electronic configuration of gadolinium (Atomic No. = 64) is
(A) 4f35d56s2 (B) 4f85d06s2 (C) 4f45d46s2 (D) 4f75d16s2
39. IUPAC name of the complex [Co(H2O)4(NH3)2]Cl3 is
(A) Tetraaquadiamminecobalt(II) chloride
(B) Tetraaquadiamminecobalt(III) chloride
(C) Diamminetetraaquacobalt(II) chloride
(D) Diamminetetraaquacobalt(III) chloride
40. Which of the following has an optical isomer?
(A) [Co(NH3)3Cl]+ (B) [Co(en)(NH3)2]2+
(C) [Co(en)2(NH3)2]3+ (D) [Co(en)(H2O)4]3+
41. Which of the following is an outer orbital complex?
(A) [Ni(NH3)6]2+ (B) [Co(NH3)6]3+ (C) [Fe(CN)6]4- (D) [Mn(CN)6]4-
42. Choose the species with a tetrahedral shape
(A) [Ni(CN)4]2- (B) [PdCl4]2- (C) [NiCl4]2- (D) [Pd(CN)4]2-

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co m .
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as ag [CET-UG-26] CHEM - A
43. Fluorobenzene can be synthesized in the laboratory
(A) By heating phenol with HF and KF
(B) From aniline by diazotization followed by heating the diazonium salt with HBF 4
(C) By direct fluorination of benzene with F2 gas
(D) By reacting bromobenzene with NaF solution

m
44. Alkyl halides react with dialkylcopper reagents to give

om . co
(A) Alkenes (B) Alkyl copper halides

.c m
(C) Alkynes (D) Alkanes

m se
e l a
45. Elimination of bromine from 2-bromobutane results in the formation of

l a s
(A) But-2-yne (B) But-1-ene (Major product)
ag
g
a for the following conversion
(C) But-2-ene (Major product)
46. The reagents
(D) Mixture of But-2-ene and but-2-yne

(A) Alcoholic KOH (B) Zn/Methanol
(C) Aqueous KOH followed by NaNH2 (D) Alcoholic KOH followed by NaNH2
47. Amongst the following alcohols, the one which would react fastest with conc. HCl and ZnCl 2

m
(A) 2-methylpropan-2-ol (B) Butanol
(C) Butan-2-ol
c o
. be dehydrated very easily?
(D) 2-methylpropanol

m
e (B) CH CH C(CH )(OH)CH CH
s
48. Among the following compounds, which one can
(A) CH CH CH CH CH OH
3 2 2 2 2

g a
l (D) CH CH CH(CH )CH CH OH
3 2 3 2 3
(C) CH CH CH CH(OH)CH
3 2 2 3
a
49. Which of the following is the strongest acid?
3 2 3 2 2

(A) m-cresol (B) Phenol (C) 3-chlorophenol (D) 3-nitrophenol
50. When phenol reacts with conc. sulphuric acid followed by conc. nitric acid, it gives
(A) 2,4,6-trinitrobenzene (B) 2-nitrophenol
(C) 2,4,6-trinitrophenol (D) 4-nitrophenol

m
51. Glycosidic linkage between C1 of -glucose and C2 of -fructose is found in

m
(A) Maltose (B) Sucrose (C) Lactose (D) Amylose
c. o
c. 52.o -D-glucose and -D-glucose are s e m
s em (A) Enantiomers (B) Anomers (C) Conformers
g l
(D)a Epimers

gla a
a
53. Which of the following is the most basic strength in an aqueous medium?
(A) NH 3 (B) CH NH 3 (C) (CH ) NH
2 (D) (CH ) N
3 2 3 3

54. The reaction of butanamide with Br2/KOH (aq) gives
(A) Propylamine (B) Ethylamine (C) Propylnitrile (D) Ethanenitrile
55. When aniline is treated with chloroform and KOH, it gives
(A) C6H5NHCH3 (B) C6H5CONH2 (C) C6H5CN (D) C6H5NC

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[CET-UG-26] CHEM - A
56. The primary, secondary and tertiary amines can be separated by using
(A) Acetylamide (B) Chloroform and KOH
(C) Benzene sulphonic acid (D) p-toluenesulphonic acid
57. In Cannizaro reaction, the slowest step is
(A) Attack of OH- at the carbonyl group
(B) Transfer of hydride to the carbonyl group
(C) Abstraction of proton from the carboxylic group
(D) Deprotonation of alcohol
58. The silver mirror test is given by
(A) Acetone (B) Acetic acid (C) Acetaldehyde (D) Benzophenone
59. Which of the following is most acidic?
(A) 4-Nitrobenzoic acid (B) Phenol
(C) Benzoic acid (D) 4-methylbenzoic acid
60. A liquid is mixed with ethanol and a drop of conc. sulphuric acid was added. A compound
formed with fruity smell is
(A) Acid chloride (B) Acid anhydride (C) Acid amide (D) Ester
x-x-x
(ROUGH WORK)

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co m .
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as ag [CET-UG-26] CHEM - A
(ROUGH WORK)

m
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.c e m
e m l a s
l a s a g
ag

m
. co
s em
g l a
a

m
m c. o
c. o s e m
s em la
gla ag
a

m . c
c. o m
(7)

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[CET-UG-26] CHEM - A
(ROUGH WORK)

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