| Post Name | ANALYST (KERALA KERA KARSHAKA SAHAKARANA FEDERATION) |
|---|---|
| Question Paper Code | 158/2025 |
| Category Code | 244/2024 |
| Date of Test | 26 November 2025 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
The wavelength of second line of the Lyman series (Rydberg constant = 10 7 m −1 ) is :
Answer
D. 112.5 nm
2
Match the following List A (Molecule) with List B (Shape) :
List – A List – B
Answer
C. H2 O
3
Which of the following statements is/are correct?
(i) PbCl 2 is more stable than PbCl 4 due to inert pair effect
(ii) Boron shows diagonal relationship with Magnesium
(iii) PbCl 4 is more stable than PbCl 2 due to inert pair effect
Answer
A. Only (i)
4
The element which has highest electron affinity is :
Answer
A. Chlorine
5
Match the following List A (Molecule) with List B (Hybridization) :
List – A List – B
Answer
D. sp3
(c) BeF2 (iii) sp3d 2
(A) (a)-(ii), (b)-(iii), (c)-(i) (B) (a)-(ii), (b)-(i), (c)-(iii)
(C) (a)-(iii), (b)-(i), (c)-(ii) (D) (a)-(iii), (b)-(ii), (c)-(i)
6
Which of the following molecules has a bond order of 3?
Answer
B. CO
7
Born-Haber cycle helps to determine :
Answer
D. Lattice energy
8
Which of the following sets of quantum numbers is not permitted?
Answer
C. n = 4, l = –1, m = 0, s = + 1 2
9
The wavelength (λ ) associated with a microscopic particle of mass 2×10–19 kg and
velocity 105 m/s is :
Answer
A. 3.31 × 10–20 m
10
Which of the following statements is/are correct?
(i) Intermolecular hydrogen bonding is present in p-nitrophenol
(ii) Boiling point of p-nitrophenol is higher than o-nitrophenol
(iii) Intramolecular hydrogen bonding is present in p-nitrophenol
Answer
D. Both (i) and (ii)
158/2025 4 A
11
Which among the following are not correct statements about Werner’s co-ordination
theory?
(i) In complexes, metal exhibit two types of valencies.
(ii) Primary valency corresponds to the co-ordination number and secondary valency
corresponds to the oxidation state.
(iii) Every metal atom has fixed number of secondary valencies.
(iv) Primary valencies are satisfied by positive ions.
Answer
B. (ii), (iv)
12
Among the following co-ordination compounds, facial and meridional isomerism is
exhibited by :
Answer
D. [Co(NH3 )3 Cl3 ]
13
For an octahedral high spin d 4 system, CFSE is equal to :
Answer
C. − 0.6 Δ 0
14
The compound which exhibit Jahn-Teller distortion is :
Answer
A. [Mn(H2O)6 ] 3 +
15
Which technique is used to determine the CFSE of transition metal complexes?
Answer
B. UV - Visible Spectroscopy
16
Which among the following contains bridged carbonyl group?
Answer
B. Fe2
17
Identify the first row transition metal (M) for HM(CO)5 species following 18 e rule:
Answer
C. Mn
18
The water splitting enzyme in photosynthesis is :
Answer
D. Mn 4O4 Cluster
158/2025 5 A
19
Match the following :
Column – I Column – II
(i) Hemoglobin
Answer
D. Oxygen transport
20
The Fe-S protein present in nitrogenase is :
Answer
B. Fe4S4
21
Which of the following species does not exhibit hyperconjugation?
Answer
D. CH₂=CH₂
22
Select the correct order of increasing acid strength :
Answer
B. CH3CH2COOH < CH3COOH < C6 H5COOH < HCOOH
23
The shape of a singlet carbene is :
Answer
B. Bent
24
The major product formed by the addition of HBr to propene in the presence of peroxide
is :
Answer
A. 1-bromopropane
25
Identify the Sawhorse projection formula of tartaric acid :
COOH rial
HOOC H
HO—4—H
Answer
C. IN
26
Select the correct R and S configuration of the compound :
Answer
D. 2S, 3R
27
Stereoisomers that contain chiral carbon atoms but are optically inactive are called :
Answer
C. Meso compounds
28
Select the method that is not used for the separation of racemic mixtures :
Answer
D. Distillation under reduced pressure
29
The E-Z system of nomenclature is used to identify :
Answer
B. Geometrical isomers
30
The configuration of the product formed by the unimolecular nucleophilic substitution
reaction of an optically active alkyl halide is :
Answer
C. A racemic mixture
31
Phenanthrene belongs to ______________ class of organic compound.
Answer
D. Aromatic
32
Name the reaction and the product, when bromobenzene is treated with bromomethane
in presence of Na :
Answer
A. Toluene and Wurtz - Fittig reaction
33
Predict the product of the given thermal cycloaddition reaction shown in the official source diagram.
Answer
A. Cyclohexene product with geminal R/R′ substituents at C1 and C4; at each center R is dashed and R′ is wedged
34
Which among the following will give an acetylide ion on reaction with propyne?
Answer
C. NaNH2
35
Reactivity order of halides for dehydrohalogenation reaction :
Answer
C. R − I > R − Br > R − Cl > R − F
36
Zeisel’s method is used to estimate
Answer
Question Cancelled
37
Which among the following reagent give ortho and para substitution with
chlorobenzene?
Answer
D. All the above
KOH(alc) HBr KOH(aq)
38
CH3 − CH2 − CH2 − Br ⎯⎯ ⎯ ⎯→ A ⎯⎯⎯→ B ⎯⎯ ⎯⎯→ C predict the product
Answer
B. Propan-2-ol
39
Which of the following statement is incorrect about Jone’s reagent?
Answer
Question Cancelled
40
What is the colour of sodium salt of indophenol in Libermann nitroso reaction?
Answer
D. Blue
41
Which of the following correctly describes the structure of cholesterol?
Answer
B. Cholesterol contains three six-membered and one five-membered rings,
a double bond between C5-C6 and a β − hydroxyl group at C3.
42
According to the isoprene rule, the molecular formula of a sesquiterpene is :
Answer
B. C15H24
43
Which of the following alkaloids contains a phenanthrene ring?
Answer
C. Morphine
44
Which toxic alkaloid, responsible for the death of the Greek Philosopher Socrates in
399 B.C., is obtained from the poisonous plant hemlock?
Answer
B. Coniine
45
Which value is used to determine average molecular weight of fatty acids in fats?
Answer
C. Saponification value
46
Which among the following is a monocyclic monoterpenoid?
Answer
C. Menthol
47
In lecithin, the phosphate group is typically attached to the glycerol backbone at :
Answer
C. C-3
48
Identify the steroid hormone from the list :
Answer
B. Cortisol
49
The cobalt atom present in the core structure is characteristic of which vitamin?
Answer
B. Vitamin B12
50
Which vitamin is classified chemically as a terpenoid?
Answer
A. Vitamin A
51
RMS velocity of N 2 at 300 K (M = 28 g/mol) is approximately :
Answer
C. 517 m/s
52
Mean free path is :
Answer
B. Average distance between successive collisions
53
Equal masses of CH4 and O2 are placed in a container at constant T. If the total
pressure is 900 mm, what is the partial pressure of CH4 ?
Answer
A. 600 mmHg
54
Which of the following solutes will increase the surface tension of water when added at
low concentration?
Answer
D. NaCl (Simple electrolyte)
55
For an ideal gas, the correct relationship between RMS speed (Urms), average speed
(Uavg) and most probable speed (Ump) is :
Answer
C. Urms > Uavg > Ump
56
The Kraft temperature (Krafft point) of a detergent is :
Answer
A. The temperature at which the detergent becomes completely miscible in
water and micelles start to form
57
An X-ray diffraction experiment uses Cu Kα radiation with wavelength λ = 1.00 Å.
A second-order Bragg diffraction (n = 2) is observed at an angle 2θ = 60° . What is the
interplanar spacing d (in Å)?
Answer
A. 2.00 Å
58
Match Column A with Column
Answer
B. Column A Column B
(i) Body Centred Cubic
59
Identify the incorrect statement :
Answer
D. Glass is an anisotropic solid
60
A solid has the following lattice parameters :
a = b = c ; α = β = γ ≠ 90°
which type of crystal system does it belong to?
Answer
A. Rhombohedral (Trigonal)
61
The dispersed phase and dispersion medium in smoke are respectively :
Answer
C. Solid and gas
62
A small quantity of FeCl 3 is added to a freshly prepared Fe(OH)3 precipitate.
The process is called :
Answer
B. Peptisation
63
When 1 ml 10% NaCl is added to 10 ml gold sol in the presence of 0.025 g of starch,
the coagulation is just prevented. The gold number of starch will be :
Answer
A. 25
64
Which of the following is not true about physisorption?
Answer
C. It is favoured by high temperature and low pressure
65
For Freundlich adsorption isotherm, when log x/m is plotted against log P, the slope will
be :
Answer
B. 1/n
66
The rate constant for a first order reaction is 0.01s–1. What will be the half-life of the
reaction in seconds?
Answer
A. 69.3
67
For a first order reaction, a plot of rate versus concentration of reactant will be :
Answer
D. Straight line with positive slope
68
The rate constant of a reaction with activation energy zero will be :
Answer
B. Independent of temperature
69
For the reaction CO2 (g) + H 2 (g) CO(g) + H 2 O(g) , increase of pressure will:
Answer
A. Have no effect on equilibrium constant
70
A change in which of the following factors will shift the position of equilibrium in a
reaction?
Answer
D. All the above
71
Which of the following is a systematic error?
Answer
A. Instrumental zero error
72
Match the following types of errors with their suitable examples:
Type of error Example
Answer
D. Personal error (4) Wrongly recording data
value
(e) Instrumental error (5) Wrong calibration of
burette
73
Which of the following statements is incorrect about significant figures?
Answer
C. Leading zeros before decimal point are significant
74
Which combination of terms correctly describes the distribution of random errors?
Answer
B. Bell-shaped, symmetric
75
Which of the following radicals is not eliminated by treatment with concentrated nitric
acid?
Answer
B. Phosphate
76
In the preparation of sodium-carbonate extract, boiling the mixture helps to :
Answer
B. Convert insoluble salts to soluble carbonates and release acid radicals
77
Match Column I with Column II correctly and select the right option :
Column I Column II
(i) Nucleation
Answer
A. Formation of tiny particles (embryos)
of a new phase
(ii) Co-precipitation
78
Identify the INCORRECT statement regarding redox indicators :
Answer
D. Redox indicators are used in acid-base titrations
79
In an acidic medium, the equivalent weight of potassium dichromate (K 2Cr2O7 ) in a
redox titration is :
Answer
A. 49 g eq–1
80
Which statement is correct regarding linear regression in analytical calibration?
Answer
C. The regression equation expresses concentration as a function of response
81
Select the correct statements from the following :
(i) Wave number of MW radiation is higher than IR radiation
(ii) Wave length of UV radiation is less than IR radiation
(iii) Wave number of MW radiation is less than visible radiation
(iv) Wave length of UV radiation is higher than visible radiation
Answer
C. Only (ii) and (iii)
82
Which of the following electronic transition requires highest energy?
Answer
B. σ → σ ∗ transition
83
In UV-Visible spectroscopy, the term hypochromic effect refers to :
Answer
D. Decrease in absorption intensity
84
Based on Woodward-Fieser rules, the λmax corresponds to the following diene is :
Answer
A. 240 nm
85
Which of the following cycloalkanone exhibit highest C = O stretching frequency?
Answer
B. Cyclopropanone
86
In the high-resolution 1 H NMR spectrum of the following molecule, the signal
corresponds to methylene protons appears as :
Answer
B. Doublet
87
An organic compound with molecular formula C5H12 gives only one signal in its
1
H NMR spectrum. The compound will be :
Answer
D. Neopentane
88
In the IR spectrum of alcohols, the broad band in the region 3200-3600 cm–1 corresponds
to :
Answer
C. O–H stretching vibration
89
In the 1 H NMR spectrum of toluene, the methyl proton signal appears as a singlet
nearly at :
Answer
A. δ = 2.3 ppm
90
Select the correct statement related to 1 H NMR spectrum of ethyl acetate :
Answer
C. Three signals (singlet, triplet and quartet)
91
Which of the following statement is not correct for conductometric titration?
Answer
C. These titrations cannot be used for very dilute solutions
92
In potentiometry which of the following is used to predict the variation in potential
during a redox titration :
Answer
D. Nernst equation
93
In atomic absorption spectroscopy which of the following is used as radiation source?
Answer
A. Hollow cathode lamp
94
Qualitative analysis can be done using flame emission spectroscopy by plotting :
Answer
B. Emitted intensity as function of wavelength
95
Which of the following statement is not correct?
Answer
B. DSC is not used to determine the purity of drugs
96
The basic principle behind colorimetry :
Answer
A. Beer-Lambert’s law
97
The resolving power of TEM is derived from :
Answer
C. Electrons
98
Which of the following is correct for Atomic Force Microscopy
Answer
D. AFM commonly operated in two modes
99
What does the Rf value in chromatography represent?
Answer
C. Distance travelled by solute divided by distance travelled by solvent front
100
In mass spectrometry, McLafferty rearrangement refers to :
Answer
A. Cleavage of beta bond followed by gamma hydrogen transfer
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