| Post Name | Laboratory Assistant (Factory), Technical Assistant in State farming Corporation of Kerala Ltd, Drugs Control |
|---|---|
| Question Paper Code | 027/2023 |
| Category Code | 102/2022, 313/2022, 508/2022 |
| Date of Test | 13 April 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
For a simple cubic crystal x-ray diffraction shows intense reflection for angles at @, and 6,
which are assigned to planes 110 and 111 planes respectively. The ratio of sin@, to sin@, is
equal to:
2
Answer
C. H3 )3 C+
2
Name the transition element which give only +3 oxidation state :
Answer
B. scandium
3
Arrange the following in the increasing order of metallic character :
Be, Na, Mg, Al, Rb
Answer
A. Al < Be < Mg < Na < Rb
4
Which type of nuclear reaction leads to the decrease of atomic number by one?
Answer
C. Electron capture
5
Hybridization of Brf5 molecule :
Answer
A. sp3 d 2
6
Which metals are suitable for photoelectric effect?
Answer
B. Alkali metals
7
Consider the following isoelectronic Na + , Mg 2 + , F − , O2 −
The correct order of increasing length of their radii is:
Answer
B. Mg 2 + < Na + < F − < O2 −
8
Which subatomic particle was discovered by the bombardment of beryllium with alpha
particles in 1932?
Answer
B. neutrons
9
What is the shape of IF7 molecule?
Answer
B. Pentagonal bipyramidal
10
The ionization enthalpy of boron is slightly less than that of beryllium. This is because of :
Answer
B. the 2p electron of boron is more shielded than that of 2s electron of beryllium
11
Calculate the number of atoms in 32g of O2 :
Answer
A. 1.2046 × 1024
12
Borax dissolves in water to form an alkaline solution. Which compound is responsible for
alkaline nature?
Answer
B. NaOH
13
Fullerenes are the only pure form of carbon. Which of the following statement substantiate
this?
Answer
D. They have smooth structure without having dangling bonds
[NiCl4 ] has a tetrahedral shape. What is the spin only magnetic moment of [NiCl 4 ]2− ?
2−
14
Answer
B. 2.83 BM
15
The product obtained by the partial hydrolysis of XeF6 is :
Answer
C. XeOF4
16
Consider the following reaction
C12 H22 O11 + A → 12C + 11 H2O
What is A ?
Answer
A. H2SO4
17
Which one is the wrong statement about ozone?
Answer
C. Change in enthalpy for its decomposition is positive
18
The chelating ligand not used for the treatment of metal toxicity by chelation therapy is :
Answer
D. DMG
19
Out of the following compounds which one is not optically active
(i)
Answer
C. o(en )3 ]3+
(ii) [PtCl 2 (en )2 ] 2 +
(iii) Cis -
20
The electronic configuration of N is 1s 2 2s 2 2px1 2py1 2pz1 which rule explain this?
Answer
B. Hund’s rule of maximum multiplicity
21
Which of the following carbanion is the most stable?
iS)
Answer
C. CHs
CH, CH,
22
Addition of HBr to 2-Pentene results in the formation of :
Answer
C. 2-Bromopentane+3-Bromopentane
23
Which of the following statement is correct regarding the structure of Z-1-bromo-2-chloro
propene?
Answer
B. –Br and –Cl are on the same side of the double bond
24
The most stable conformation of n-butane is :
Answer
D. Anti staggered
A 5 027/2023
25
Aryl halides are less reactive towards nucleophilic substitution as compared to alkyl halides
due to :
Answer
C. Resonance stabilization
26
Which of the following represents a racemic mixture?
Answer
C. 50% (R)-2-butanol, 50% (S) -2-butanol
27
Freon is :
Answer
A. Chlorofluoromethane
28
Which of the following pollutants in water caused Minamata disease?
Answer
B. Mercury
29
The function of a lubricant is :
Answer
D. All of these
30
Which of the following adsorbent material used in thin layer chromatography?
Answer
D. All of these
31
is an example of :
Answer
A. Mannich reaction
32
During reaction of phenol with chloroform in presence of aqueous hydroxide the major
product formed is :
Answer
B. o-hydroxy benzaldehyde
33
The product formed in carbylamine reaction is :
Answer
C. Isocyanide
34
Preparation of arylfluorides by heating arenediazonium fluroborates is known as :
Answer
B. Schiemann reaction
35
Which of the following is most easily cleaved by HBr?
Answer
D. \ /
O
36
Which of the following is known as Omega-3 fatty acid?
Answer
B. Linolenic acid
37
Friedel crafts alkylation proceeds by the formation of
Answer
A. Carbocation
38
Which of the following is not a 5-membered heterocyclic compound?
Answer
B. Pyridine
39
NBR is a polymer of :
Answer
C. Butadiene and Acrylonitrile
40
The empirical formula of the hydrocarbon containing 80% carbon and rest hydrogen is:
Answer
C. CH3
41
Which of the following spectroscopic technique is / are correctly matched with the radiations
used for their study?
(i) Vibrational Spectroscopy – IR waves
(ii) Electron Spectroscopy – Gamma rays
(iii) NMR Spectroscopy – Radio waves
Answer
B. Only (i) and (iii)
42
What is the degree of freedom of water at its melting curve?
Answer
B. 1
43
For a simple cubic crystal, X-ray diffraction shows intense reflection for angles θ₁ and θ₂, assigned to planes 110 and 111 respectively. The ratio of sin θ₁ to sin θ₂ is equal to:
Answer
C. √2/√3
44
The law which states that heat and work are mutually inter convertible is known as?
Answer
B. First law of thermodynamics
45
For an isothermal expansion of an ideal gas which of the following is / are true :
(i) ΔH = 0
(ii) w = −q
(iii) ΔU = 0
Answer
D. All of the above
46
The RMS velocity of a gas at 200K is 350 m/s. The RMS velocity of the same gas at a
temperature of 800K is :
Answer
B. 700 m/s
47
An element exists in two crystallographic modifications with FCC and BCC structure. The
ratio of densities of FCC to BCC (ρ FCC : ρ BCC ) modifications in terms of volume of their unit
cell is :
Answer
C. 2VBCC : VFCC
48
The conductivity of an electrolytic solution of 0.05 mol L−1 concentration is found to be
0.0125 ohm–1 cm–1. The molar conductivity of the solution is :
Answer
C. 250 ohm mol cm
–1 –1 2
49
During the process of osmosis, the volume of less concentrated solution is :
Answer
B. Decreased
50
What is the unit of rate constant of a second order reaction?
Answer
A. L mol −1 S−1
51
An acid solution with pH = 1 is diluted to double its volume by adding water. The pH of the
resulting solution will be :
Answer
C. Between 1 and 2
52
The defect in which an electron is trapped in place of an anion vacancy in a crystal is
known as:
Answer
D. F-centre
53
Which of the following statement is / are true for Smectic liquid crystals?
(i) They have thread like structure
(ii) They are affected by strong magnetic field
(iii) Their flow is non-Newtonian
Answer
A. Only (iii)
54
Which of the following statement is/are true about chemical potential?
(i) It is a partial molar property
(ii) It is an Intensive thermodynamic property
(iii) It varies with temperature
Answer
D. All of the above
55
For a reversible chemical reaction, the ratio between the rate constant of forward reaction
and the rate constant of backward reaction is called :
Answer
D. Equilibrium constant of the reaction
56
An aqueous solution of sodium acetate is :
Answer
C. Basic
57
The law which connects the relationship between pressure and solubility of a gas in a liquid
at a given temperature is called:
Answer
A. Henry’s law
58
The phenomenon of Phosphorescence is due to :
Answer
A. Triplet to Singlet transition of electron
59
To which point group does Ammonia molecule belongs to:
Answer
D. C3v
60
The symmetry operation product σ v ' C2 when applied to BF3 molecule gives :
1
Answer
C. Identity Element
61
Which of the following compounds are considered for calculating octane and cetane number?
Answer
B. Iso-octane and cetane
62
A precipitated material can be converted to a colloidal dispersion by the action of a suitable
electrolyte. The process is known as :
Answer
D. Peptization
63
nC + (n + 1)H2 → Cn H2n + 2 , is a reaction that occurs at high temperature and pressure in the
presence of a catalyst. This process is known as :
Answer
C. The Bergius process
64
Which of the following statement is correct?
Answer
B. ZnCO3 → ZnO + CO2 , is an example for calcination process
65
Assertion : Ball milling method of synthesizing nanomaterials is a top down method.
Reason : Mechanical pressure is applied to crush big particle to nano size materials.
Answer
A. Both assertion and reason are true
66
Which among the following compound cannot be employed as a catalyst in liquid/liquid,
liquid/solid and liquid/gas type reactions?
Answer
C. Carbonic anhydrase
67
The specific volume ratios of Ni, Cr, Al and W are 1.6, 2, 2.3 and 3.6 respectively. Which
among the following metals will have higher oxidation corrosion rate?
Answer
A. Ni
68
A refractory material should possess all the properties below except, :
Answer
C. Higher porosity
69
Which statement is not correct for the chlor-alkali process?
Answer
D. Ion exchange membrane allows the passage of sodium ions and hydroxide ions
70
What will be the charge on the particles of a protein sol if it is dispersed in an acidic medium?
Answer
B. Positive
71
Which technique is most used in clinical laboratories to analyze immuno assays?
Answer
B. Nephelometry
72
The compound which is used for rose fragrance is :
Answer
D. Phenyl ethyl alcohol
73
Thermosetting polymers can be moulded in :
Answer
C. Both
74
Which among the following statements are true?
(i) Vulcanization is a process involving the crosslinking of polymer chains using
5% sulphur at a temperature of 140-180°C.
(ii) In the vulcanization process plastic rubber is converted into the elastic rubber.
(iii) Peroxide and urethane vulcanization are two non-sulphur vulcanization processes.
(iv) Vulcanization process was discovered by Charles Goodyear in 1839
Answer
Question Cancelled
75
Low supersaturation results in :
Answer
A. Faster growth and larger size crystal
76
Nitration of chlorobenzene results in:
Answer
A. 70% para and 30% ortho isomer as products
77
Temperature at a distant place can be measured by using :
Answer
D. Pressure spring thermometers
78
The process used for obtaining high purity liquid is :
Answer
Question Cancelled
79
Match the following :
Answer
B. Vinyl acetate (ii) Decaffeination of coffee beans
80
Benzenesulfonic acid on treatment with sulphuric acid under Argon gas purging yields :
Answer
C. Benzene and sulphur trioxide
81
Displacement pump is classified on the basis of :
Answer
D. Mechanical operation of principle
82
The three elements of the fire triangle are :
Answer
B. Fuel, Oxygen and Heat Source
83
Which of the following fire extinguisher is suitable for live electrical fire?
Answer
C. Halon
84
The act which regulates the transportation of hazardous waste is :
Answer
C. RCRA
85
A toxic substance produced by plant or animal origin is specially referred to as :
Answer
A. toxin
86
The most common cause of blue baby syndrome is :
Answer
B. Nitrate contaminated drinking water
87
The radioactive isotope that is normally used in ionization smoke detectors is :
Answer
C. Amarecium-241
88
NFPA 72 is related to :
Answer
A. Fire alarm systems
89
The act/rule that protest the right of workers in contingencies such as sick, maternity,
temporary or permanent physical disability and death due to employment injury is :
Answer
D. The Employee’s State Insurance Act 1948
90
An industrial chemical process for converting mercaptans in sour gasoline into disulfides is
known as :
Answer
B. Doctor’s Sweetening process
91
1 BTU
Answer
C. 252
92
The element which is not used as a nuclear fuel is :
Answer
B. Cadmium
93
The correct statement regarding a moderator in a nuclear reactor is/are :
(i) It is used to slow down the fast moving secondary neutrons produced during the fission
(ii) Heavy water and graphite are the commonly used moderators.
(iii) A breeder reactor does not require a moderator.
(iv) Cadmium rod is the most common moderator.
Answer
C. All except (iv) are correct
94
The oil refinery which is run under ONGC in India is :
Answer
D. Tatipaka
95
The fuel with lowest calorific value among the following is :
Answer
B. Lignite
96
The reference fuel mixture used to assign octane number and cetane number are
respectively:
Answer
A. iso-Octane and n- Heptane, n-Hexadecane and 1-Methyl naphthalene
97
The components common in water gas and producer gas are:
Answer
B. Hydrogen and Carbon monoxide
98
The correct statement regarding copper chloride sweetening process is :
(i) Petroleum refining process.
(ii) A slurry of clay and cupric chloride is used.
(iii) Mercaptans are oxidized during this process.
(iv) Viscous disulfides are formed during this process
Answer
D. All the four are correct
99
The largest tidal energy producing area in India, Khambhat coast and the gulf of Khambhat
is located in the state of :
Answer
A. Gujarat
100
The biggest thermal power plant in India is:
Answer
C. Vindhyachal, Madhya Pradesh
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