| Post Name | Work Assistant, Assistant Chemist & Analyst - The Kerala Ceramics Ltd, Travancore Titanium Products Ltd & Foam Mattings (India) Ltd |
|---|---|
| Question Paper Code | 028/2022 |
| Category Code | 407/2019, 080/2021, 199/2019 |
| Date of Test | 6 March 2022 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
What is the shortest wavelength line (in nm) in the Lyman series of hydrogen spectrum ?
Answer
A. 91.2 nm
2
The dipole moment of HCl is 1.03 D and distance between atoms is 127 pm. What is the percentage ionic character of HCI bond ?
Answer
D. 16.9%
3
Calculate the formal charge of S atom in SO,.
Answer
Question Cancelled
4
Which of the following molecules has highest value of percentage s-character for the central atom ?
Answer
C. BeF,
5
Wave functions of electrons in atoms and molecules are called
Answer
B. orbitals
6
1 amu= ___ gm.
Answer
A. 1.66x10~*4
7
The electronic configuration of an element is 1s* 2s* 2p® 3d° 4s'. This represent its
Answer
Question Cancelled
8
The set representing correct order of first ionization energy is
Answer
B. Be>Mg>Ca
9
Halogen that can be easily reduced
Answer
D. F,
10
Each question is provided with four choices
Answer
C. and
11
Which among the following is an organometallic compound ?
Answer
D. Methyl lithium 12 When excess of ammonia solution is added to CuSO, solution, —_—____—_. is formed. A) [Cu(NHs)o]** B) [Cu(NH3),]* C) [Cu(NH,),]* D) [Cu(NH,),]°* 13 K[Al(C50,)] is called A) Potassium aluminooxalate B) Potassium trioxalato aluminate(III) C) Potassium aluminium(IIl) oxalate D) Potassium trioxalatoaluminate(V1) 14 A compound with molecular mass 112 is transparent in UV spectrum. In infrared spectrum it shows two bands at 2940 and 1464 cm". In the NMR it forms a singlet at 8.488. Identify the compound. A) Cyclooctane B) Octane C) Heptane D) Benzene 15 The complex ion [Cr(H,0)]** has d orbital electronic transition with energy of 169 kJ/mol. At what wavelength does the [Cr(H,O)]?* ion absorb ? A) 707.4nm B) 7.07 nm C) 2.81 nm D) 281 nm 16 The method of electrolytic refining is not suitable for the extraction of A) Aluminium B) Copper C) Mercury D) Silver 17 Biological function of carbonic anhydrase and carboxy peptidase A respectively are A) Interconversion of CO, and carbonates and gene regulation B) Gene regulation and hydrolysis of peptide bond C) Gene regulation and interconversion of CO, and carbonates D) Interconversion of CO, and carbonates and hydrolysis of peptide bond
12
When excess of ammonia solution is added to CuSO, solution, is formed.
Answer
D. [Cu(NH,),]°*
13
K,[Al(C,0,)] is called
Answer
Question Cancelled
14
A compound with molecular mass 112 is transparent in UV spectrum. In infrared spectrum it shows two bands at 2940 and 1464 cm". In the NMR it forms a singlet at 8.488. Identify the compound.
Answer
Question Cancelled
15
The complexion [Cr(H,0)]** has d orbital electronic transition with energy of 169 kJ/mol. At what wavelength does the [Cr(H,O)]?* ion absorb ?
Answer
A. 707.4nm
16
The method of electrolytic refining is not suitable for the extraction of
Answer
C. Mercury
17
Biological function of carbonic anhydrase and carboxy peptidase A respectively are
Answer
D. Interconversion of CO, and carbonates and hydrolysis of peptide bond
18
Match the following : a 2n peroxidase b Cu Il carboxypeptidase Cc Fe ili. haemocyanin IV nitrogenase a b Cc
Answer
C. iv ili ll
19
The number of ATP molecules hydrolysed when 3 Nat ions pumped out of cell and 2 K* pumped into the cell
Answer
A. 1
20
In the active sites of many enzymes, metals are coordinated by the aminoacid histidine, which element in histidine donates the electrons that form the coordinate bond ?
Answer
C. Nitrogen
21
Which of the following is not refined by zone refining method ?
Answer
D. Gold
22
Which of the following is correctly matched ? Column | Column Il Column Ill
Answer
C. [Co(CO),. diamagnetic — Tetrahedral, sp®
23
The organometallic compound follows 18 electron rule, the hapticities of two cyclopentadienyl groups are [W(C,H-).(CO)>]
Answer
Question Cancelled
24
The order of CO bond strengths in following metalhexacarbonyls is likely to be
Answer
A. V(CO)_~ < Cr(Co)g < Mn(CO)¢*
25
Which of the following is not an organometallic compound ?
Answer
B. Cis-platin
26
A key feature of Fischer-Tropsch process is
Answer
A. hydrocarbon formation
27
Accuracy expresses the
Answer
A. correctness of an experiment
28
In an experiment values 2.2, 2.3 and 2.4 are obtained while the true value is 4.6. Now if we double each value then
Answer
C. Accuracy is increased but precision remains unchanged
29
The thermogram in differential thermal analysis is a plot of
Answer
B. AT Vs Temperature
30
The donor atom in EDTA are
Answer
B. Two N and four O
31
Limiting current in polarography depends on
Answer
D. All the above
32
The material of cathode in Hollow cathode lamp constructed in AAS
Answer
C. Element to be investigated
33
Cell constant is
Answer
B. length/area
34
Olefin hydrogenation of using Wilkinsons catalyst initiates with
Answer
A. A phosphine dissociation from [Rh (PPh,)Cl]
35
Free radicals are detected by the
Answer
B. CIDNP
36
Which of the following reaction undergoes without formation of any intermediate ?
Answer
D. Sy2 reaction
37
In E2 reaction the dihedral angle of synperiplanar conformation is
Answer
A. 0°
38
Which of the following is not an electrophile ?
Answer
A. CH,
39
Homolytic fission for generation of free radical is favoured most in bond
Answer
B. O-O
40
Which type of electronic transition can be seen in saturated aldehyde and ketone ?
Answer
C. non andro
41
For the structure E-1-bromo-1-chloro propene, the correct statement is
Answer
A. —CH, and —-Cl are on same side of double bond
42
The correct R-S notation for the structure 3-chlorobutane-2-ol is
Answer
Question Cancelled
43
An aqueous solution of 6.3 g oxalic acid dehydrate is made upto 250 ml. The volume of 0.1 N NaOH required to completely neutralize 10 ml of this solution is
Answer
C. 40 ml
44
Wurtz reaction on a mixture of ethyl iodide and n-propyl iodide does not yield the hydrocarbon
Answer
B. n-propane
45
Alcoholic solution of KOH is used for
Answer
D. Dehydrohalogenation
46
A complex has a composition corresponding to formula CoBr,Cl.4NH3. What is the structural formula if conductance measurements show two ions per formula unit ? Silver nitrate solution gives an immediate precipitate of AgCl but no AgBr.
Answer
D. [CoBr,(NH3),]Cl
47
Which among the following is not aromatic ?
Answer
Question Cancelled
48
Which among the following alkyl halide will react by both S,1 and S,2 pathways ?
Answer
C. (CHg)2CH — X
49
Which of the following reaction cannot be employed to prepare alkyl halides ?
Answer
B. MPV reduction
50
Aniline reacts with glycerol in presence of sulphuric acid and nitrobenzene as an oxidizing agent. Which among the following statement is more correct ?
Answer
D. Skraup reaction and the product is quinoline.
51
Among the following reactions and the final product, which pair does not match ?
Answer
C. Fries rearrangement gives methoxybenzoic acid
52
Phenol is dissolved in caustic soda solution along with CO, gas at about 398 K and 4 —7 bar pressure gives which of the following compound ?
Answer
D. None of the above
53
Glycerol on periodic acid oxidation gives
Answer
B. 2HCHO + HCOOH
54
Predict the product of the following reaction. O I Bry, NaOH | > CH,CHs — ~NH
Answer
B. Ethylamine
55
Identify the wrong statement regarding carbocation rearrangement.
Answer
D. The configuration of a carbon centre undergoing a 1,2-shift in a carbocation is not retained.
56
Etard reaction in the following is
Answer
A. Oxidation of toluene to benzaldehyde by chromyl chloride
57
The chlorination of toluene in pressure of ferric chloride gives mostly
Answer
Question Cancelled
58
In the nitrating mixture, HNO, acts as which among the following ?
Answer
A. Base
59
Which of the following is not a correct statement on aromatic electrophilic substitution reactions ?
Answer
B. — Bris activating and o, p-directing
60
Identify the wrong statement.
Answer
B. The rate constant for the base-catalysed «-halogenation of propanone decreases in the order Cl, > Bry > Ip.
61
Identify the product of Knoevenagel reaction.
Answer
B. Unsaturated acyclic system
62
Identify the starting reagents in Dieckman Condensation ?
Answer
D. One molecule with two ester towards the end of the molecule
63
Identify the wrong articulation about Claisen condensation.
Answer
Question Cancelled
64
A carbonyl compound reacts with an ylide to form an alkene. Identify the reaction.
Answer
B. Wittig reaction
65
Which of the following compounds does not contain an active methylene group ?
Answer
C. Diethylfumarate
66
The approximate total energy of an ideal monoatomic gas in kJmol"! at 27°C is
Answer
A. 1.67
67
At what temperature will helium atoms have the same rms velocity as hydrogen molecule at 300K ?
Answer
D. 600K
68
Give the correct statement about the viscosity of liquids.
Answer
B. decreases with rise in temperature and increases with increase in pressure
69
The Miller indices of crystal planes that cut through crystal axes at (2a, —3b, —3c) is
Answer
C. 322
70
Number of effective atoms per unit cell in a bcc system is
Answer
B. 2
71
The rule that relates the molar heat of vaporisation of a liquid with its normal boiling point is
Answer
C. Trouton’s
72
Calculate the approximate pOH of 0.03 M solution of HCI at 25°C is
Answer
C. 12.48
73
If s is solubility of Al(OH), in water then it solubility product is
Answer
D. 27s*
74
A buffer is most effective in the range of pH values between
Answer
A. pK-1 and pK +1
75
Inthe conversion of nitrogen to ammonia at 400°C, what is the standard Gibbs energy in kJmol" if the equilibrium constant for the formation of ammonia is 10 at 1 bar pressure ?
Answer
C. 20
76
Whatis the change in boiling point of water at a 127°C per Pascal if the molar enthalpy of vaporisation is 40 kJmol! and molar volume change is 30 m? mol! ?
Answer
B. 10-+ KPa™!
77
Which is not an application of Nernst distribution law ?
Answer
D. study of partial molar properties
78
5.2 moles of an ideal gas expand reversibly from a volume of 8 lit to 80 lit at 300K. Calculate the approximate change in entropy in JK~".
Answer
B. 100
79
Work done in a closed system in an adiabatic process is equal to the increase in ______—cof the system.
Answer
A. Internal energy
80
The value of Joule Thomson coefficient for an ideal gas is
Answer
C. zero
81
Calculate the approximate entropy change in JK~'mol"’ if n-hexane boils at 68.7°C at 1 bar pressure if the molar enthalpy of vaporisation is 28850 Jmot"t.
Answer
B. 84.4
82
Calculate the approximate amount of work if one mole of an ideal gas at 27°C isothermally expands from a volume of 10 lit to 20 lit against a constant external pressure of 1 atm.
Answer
B. 1kJ
83
The term for the activity of a gas which serves as a thermodynamic counterpart of gas pressure is
Answer
C. fugacity
84
What percentage of reactant will be left at the end of 25 mins, if the reaction is of first order with a half-life period of 5 mins ?
Answer
C. 3.1
85
A possible unit of second order rate constant is
Answer
B. Lmot-'s71
86
In Arrhenius equation, k = Ae — (E,/RT) the pre exponential factor has the same unit as that of
Answer
C. rate constant
87
Which of the following is not an assumption in the derivation of Langmuir adsorption isotherm ?
Answer
D. There is lateral interaction between absorbate molecules
88
The Michalis — Menton mechanism account for the
Answer
D. dependence of rate on the concentrations of substrate and enzyme
89
The experimental effect of increase in conductance of a strong electrolyte in aqueous solution to a certain limiting value with increase in potential is called __ effect.
Answer
D. Wien
90
Calculate the ionic strength of 0.2 molal BaCl, solution.
Answer
C. 0.6
91
The molar ionic conductance of an infinite dilution of LiX is found to be 90x10-* Sm?mol!~'. Find the ionic conductance of halide ion if that of Li* is 30x10~4 Sm?mol™.
Answer
C. 60x10~4 Sm2mo!"!
92
A zinc rod is dipped in a 0.1 M solution of ZnSO, at 25°C and if the salt undergoes 100% dissociation, calculate the approximate potential of electrode if the standard potential E°(Zn?*/Zn) is -0.76V.
Answer
C. -0.79
93
Calculate the potential of the cell Zn, Zn2* (1M)|Fe?* (1M); Pt, if the respective standard reduction potential of half-cell are respectively —-0.76V and +0.77V.
Answer
C. +1.53V
94
The standard electrode potential of quinhydrone electrode can be written as
Answer
B. Egjeg? = +0.6996 — 0.0591pH
95
If the rotational constant B of '*C'®O is 3.8 cm, the position of first rotational line in its spectrum in cm! is
Answer
C. 7.6
96
Zero point energy of a simple harmonic oscillator in terms of oscillation frequency wem1is
Answer
A. %w
97
In the vibrational Raman spectrum separation of each line from the centre of the excitation line gives the Raman active vibrational frequency of the molecule.
Answer
D. fundamental
98
In the electronic spectrum the correct expression for Voontinuum limit |S (D is the dissociation energy, E,, is the excitation energy and double prime for lower electronic state)
Answer
A. Dg! + Eex
99
In a 60 MHz instrument a chemical shift value of 2 ppm from TMS is equivalent to Hz.
Answer
C. 120
100
The number of lines in the EPR spectrum of '?CF,H radical is
Answer
D. 6
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