| Post Name | CHEMICAL ASSISTANT - GROUND WATER DEPARTMENT |
|---|---|
| Question Paper Code | 022/2019 |
| Category Code | 440/2016 |
| Date of Test | 28 May 2019 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Maximum permissible limit of nitrate nitrogen in drinking water as per WHO standard
is :
Answer
C. 10 mg/L
2
It is desirable that CRH of a fertilizer should be :
Answer
A. High
3
When a pesticide dose of 0.5 to 2.0 kg/ha is applied, its concentration in the upper soil
layer is :
Answer
A. 0.25 to 1.0 mg/kg
4
Ammonia volatilization losses are of great importance in :
Answer
C. Calcareous soils
5
Producer gas contains :
Answer
C. Carbon monoxide and nitrogen
6
On comparing with humic acid, fulvic acid has :
Answer
A. More hydrophilic group
7
Amino acids are positively charged :
Answer
D. At pH value below the isoelectric point
8
Feldspars belong to the silicate mineral group.
Answer
C. Tektosilicate
9
Bacillus comes under the group.
Answer
B. Facultative anaerobes
10
Each question is provided with four choices
Answer
D. having one correct answer.
Choose the correct answer and darken the bubble corresponding to the question number using
Blue or Black Ball Point Pen in the OMR Answer Sheet.
11
Smectite group consists of the following mineral/minerals :
Answer
D. All the above
12
White alkali soils have :
Answer
B. Neutral soluble salts
13
Which one of the following is an easily weathered mineral :
Answer
D. Olivine
14
The dominant mineral in shale is :
Answer
A. Clay
15
The net effect of adding organic matter to acidic soils is generally an :
Answer
C. Increase in pH
16
Ammonium polyphosphate contain __________ % P2O5.
Answer
B. 60
17
The contribution of organic matter of CEC is greatest for soils having :
Answer
C. Low clay content
18
Approximate half life of 2,4-D in soil is :
Answer
A. One month
19
Strontium-90 behaves in soil much the same as :
Answer
B. Calcium
20
Ammonium ion moves through the plasma membrane primarily by :
Answer
C. Diffusion
21
SO4−2 adsorption capacity of the soil is decreased by :
Answer
A. Increased soil pH
22
Major sources of atmospheric sulfur.
Answer
D. Soils and industry
23
Deficiency of __________ element is expected in organic soils due to the formation of
stable complexes with organic matter.
Answer
B. Copper
24
Available water is held in the soil against a pressure of upto approximately __________
bar.
Answer
C. 15
25
A soil to be designated as clay if it has a clay separate of :
Answer
A. Not less than 40%
26
Particle density of soil is affected by :
Answer
C. Organic matter content
27
Ionic radii of Al3+ is :
Answer
B. 0.50 Å
28
NO3 reduction in plants is closely linked to :
Answer
A. Photosynthesis
29
Cation exchange capacity of chlorite is same as that of __________.
Answer
B. Illite
30
Nitrogenase enzyme consists of :
Answer
D. 4 protein complex
A 5 22/2019
{P.T.O.}
31
Polyphenols are produced in soil during the mineralization of lignin.
Answer
C. Acid conditions
32
The equilibrium constant Keq depends on :
Answer
B. Temperature
33
The three carbon compound formed by the reaction between CO2 and RUBP is :
Answer
D. PGA
34
Montmorillonite has a unit layer charge of :
Answer
A. 0.5
35
Zeta potential can be reduced by :
Answer
D. All the above
36
Which one of the following is a photosynthetic N fixing bacteria ?
Answer
C. Rhodospirillum
37
The most abundant form of organic P compound in soil is :
Answer
A. Inositol phosphate
38
The first study on legume - Rhizobium symbiosis conducted in India by :
Answer
C. N.V. Joshi
39
Environmental Protection Act came into force in the year :
Answer
D. 1986
40
The Universal Soil Loss Equation was developed by :
Answer
A. Wischmeier and Smith
41
Which state in India is the largest producer of saffron ?
Answer
A. Jammu and Kashmir
42
Which one of the following is NOT a basic feature of the Indian Constitution ?
Answer
D. Presidential form of Government
43
Who is the present Chairman of NITI Aayog ?
Answer
B. Shri Narendra Modi, The Prime Minister
44
Who presided over the Surat Session of the Indian National Congress ?
Answer
A. Rashbehari Ghosh
45
In which language Gandhiji published the paper Harijan ?
Answer
C. English
46
On which date Prime Minister Shri Narendra Modi announced, Ayushman Bharat Health
Insurance Scheme ?
Answer
B. 15th August, 2018
47
Who built the Dutch Palace at Mattancherry in 1555 ?
Answer
D. The Portuguese
48
The most important lake in North Kerala is :
Answer
A. Kavvayi lake
49
Which Travancore ruler, shifted the Capital of Travancore from Padmanabhapuram to
Thiruvananthapuram ?
Answer
D. Dharma Raja
A 7 22/2019
{P.T.O.}
50
In which year was Ancharakandy Cinnamon estates established ?
Answer
C. 1767
51
In which works Chattampi Swamikal has expressed his profound faith in Ahimsa or
non-violence ?
Answer
D. Jivita Karunyanirupanam
52
The first of the temples consecrated by Sri Narayana Guru was at :
Answer
A. Aruvippuram in Neyyattinkara
53
Chirayankizh Taluk Muslim Samajam was founded by :
Answer
C. Vakkom Abdul Khadar Maulavi
54
In which year Kuriakose Chavara established CMI Church at Mannanam ?
Answer
B. 1831
55
‘Kallumala Samaram’ an agitation under the leadership of Shri Ayyankali took place at :
Answer
D. Perinad
56
Who is the architect of ‘Statue of Unity’, world’s tallest statue built at Kevadiya in Gujarat ?
Answer
B. R.V. Suthar
57
Who is the present Chief Minister of Sikkim ?
Answer
A. Pawan Kumar Chamling
58
Who won the ONV Literary Award for the year 2018 ?
Answer
C. M.T. Vasudevan Nair
59
Who has won the women’s singles title in the Australian open, 2018 ?
Answer
D. Caroline Wozniacki
22/2019 8 A
60
Who is the director of the film ‘Kayamkulam Kochunni’ ?
Answer
C. Roshan Andrews
61
The effective nuclear charge felt by the 4s electron of Mn atom is :
Answer
B. 3.60
62
Which among the following is the most appropriate statement(s) ?
(I) Bromides have higher lattice energies and higher stabilities.
(II) The Solubility of ionic compounds in polar solvents decreases with decrease in the
degree of polarisation.
(III) The hardness of ionic compounds increases with increase in the degree of polarisation.
(IV) The solubility of ionic compounds in polar solvents decreases with increase in the degree
of polarisation.
(V) Bromides have lesser lattice energies and higher stabilities.
Answer
C. Statements (I) and (IV) are correct.
63
The geometry of ClO−
3 ion as predicted by VSEPR theory is :
Answer
B. Pyramidal
64
Choose the incorrect pair :
Answer
D. d transition and colour of the compounds
65
Al(CH3)3 is an example of :
Answer
A. A hard acid
66
The non-aqueous solvent with longest liquid range is :
Answer
D. H2SO4
67
In the pressure range 1 kPa to 100 kPa, the Hill constants for Hemoglobin and Myoglobin
are :
Answer
A. 2.8 and 1.0 respectively
68
An old wooden stool was found to give 7.7 disintegrations g⁻¹ min⁻¹. If a fresh wooden material showed a ¹⁴C (t₁/₂ = 5730 years) activity of 15.4 disintegrations g⁻¹ min⁻¹, age of the sample is:
Answer
C. 5732 years
69
Choose the odd function among the following :
Answer
B. x2 sinx
70
The Van Der Waals constants of a gas are: a = 0.7 dm⁶ atm mol⁻² and b = 0.02 dm³ mol⁻¹. The critical temperature of the gas is:
Answer
B. 126 K
71
Choose the incorrect relation from the following thermodynamic equations:
Answer
C. (∂S/∂P)ₜ = −(∂A/∂V)ₜ
72
The molar ionic conductance at infinite dilution of lithium chloride (LiCl) is found to be
8.92 mS m2 mol−1. If the molar ionic conductance of Li+ion is 3.87 mS m2 mol−1, the molar
ionic conductance of chloride ion would be :
Answer
D. 50.5×10−4 S m2 mol−1
73
If k, the rate constant for the decomposition of N2O5 is 5×10−4 s−1, the time required for the
N2O5 concentration to be 50% of the original value is :
Answer
A. 1.38×103 s
74
The correct order of efficacy for coagulating a lyophobic sol. is given by :
Answer
D. Mg2+ > Ca2+ > Ba2+ > Na+ > K+
75
The dissociation constant of acetic acid is 2×10−5 at 25C. What would be the pH of an
aqueous solution obtained by mixing 0.3 g of acetic acid and 4.1 g of sodium acetate and
making a 500 ml solution ?
Answer
A. 5.8
76
For the system Ni(s) + 2Ag⁺(aq) → Ni²⁺(aq) + 2Ag(s), the Nernst equation can be written as:
Answer
C. Ecell = E°cell − (RT/2F) ln([Ni²⁺]/[Ag⁺]²)
77
The correct IUPAC name of the compound A is :
Compound A
Answer
A. (2R, 3R)-2, 3, 4-trihydroxybutanal
78
In the most stable conformation of trans-1-t-butyl-3-methylcyclohexane, the t-butyl group
at C1 and methyl group at C3 are :
Answer
A. Equatorial and axial respectively
79
Choose the correct statement(s) about [18]-Annulene.
Answer
C. Six inner hydrogens are well shielded and shows an NMR signal at δ (−2.88 ppm)
80
The reaction in which nitrene is not an intermediate is :
Answer
B. Arndt-Eistert reaction
81
The reaction used for the conversion of an aldose into the next higher ketose is :
Answer
C. Wolfram’s Method
82
The intermediate associated with Wolff rearrangement reaction is :
Answer
B. Ketene
83
Which of the following vitamins and their deficiency diseases are not correctly
matched ?
Answer
D. Vitamin B6 - Beri-beri
84
The reaction used for the synthesis of α-amino acids is :
Answer
C. Strecker’s synthesis
85
In the complexometric estimation of Ca2+, which of the following is a masking agent ?
Answer
A. Cyanide ion
86
The molar absorption coefficient of a complex is 1200 dm3 mol−1 cm−1 and the minimum
detectable absorbance is 0.01. The minimum concentration of the complex that can be
detected using a sample cell of 1 cm is :
Answer
D. 8.33×10−6 M
87
The number of significant figures in the following measurement is: Temperature = 0.0045°C
Answer
B. 2
88
Choose the correct sentence(s) regarding accuracy and precision.
(I) A precise value shows the agreement between several experiments.
(II) The precise value must be in agreement with true value.
(III) Standard deviation is used to express the accuracy of experiments.
(IV) Error distribution curves for a more accurate set of results is in close proximity to
the true value.
Answer
B. Statements (I) and (IV) are correct
89
The sharp band at wavelength 528 nm in the UV - Vis absorption spectra of KMnO4
can be attributed to :
Answer
A. LMCT transition
90
The correct order of decreasing vibrational frequency for C–Cl, C–C, C–Br, C–H and
C–O is :
Answer
D. C–H, C–C, C–O, C–Cl, C–Br
91
In the mass spectrum of CH₂Cl₂, a group of three peaks at m/z = 84, 86 and 88 in a ratio 9 : 6 : 1 are assigned to the parent ion. These peaks are due to:
Answer
C. Cl has two isotopes
92
A 1H–NMR spectrum of compound contains a singlet, a triplet and a quartet peaks.
Choose the possible compound from the following :
Answer
B. CH3CCl2CH2CH3
93
Which of the following statement(s) is true for condensation polymers ?
(I) Polymer structure contains only C–C bonds
(II) Monomers used can be bifunctional or polyfunctional
(III) A small by-product molecule is eliminated
Answer
D. (II) and (III) are correct
94
Which of the following is an auxochrome?
Answer
A. −OH
95
The compound showing insecticidal properties is :
Answer
C. γ-hexachlorocyclohexane
96
Which of the following is NOT a function of a food additive ?
Answer
D. None of the above
97
The antibiotic effect of sulfadrugs is due to :
Answer
B. Their structural similarity with p-aminobenzoic acid amide
98
Identify a molecule which can be used as soap :
Answer
D. Sodium stearate
99
Which of the following is saccharin?
Answer
A. Saccharin structure: C₆H₄(CO)(SO₂)NH cyclic imide
100
The condition in which the ratio of chemical nutrients in ecosystem increases beyond optimal
value is known as :
Answer
B. Eutrophication
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