Chemical Assistant Ground Water Department 440/2016 Answer Key 22/2019

6/01/2019
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Post: Chemical Assistant
Department: Ground Water Department
Category Code: 440/16
Question Paper: 22/19
Qualification: Masters Degree in Chemistry/ Agricultural Chemistry; B.Sc Degree in Chemistry
Date of Test: 28-05-2019


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  1. Maximum permissible limit of nitrate nitrogen in drinking water as per WHO standard is :
    • 45 mg/L
    • 5 mg/L
    • 10 mg/L
    • 25 mg/L

  2. It is desirable that CRH of a fertilizer should be :
    • High
    • Low
    • Very low
    • Medium

  3. When a pesticide dose of 0.5 to 2.0 kg/ha is applied, its concentration in the upper soil layer is :
    • 0.25 to 1.0 mg/kg
    • 0.5 to 2.0 mg/kg
    • 0.1 to 1.0 mg/kg
    • 1.0 to 2.0 mg/kg

  4. Ammonia volatilization losses are of great importance in :
    • Acidic soils
    • Soils with high CEC
    • Calcareous soils
    • Soils with high clay content

  5. Producer gas contains :
    • Hydrogen and carbon monoxide
    • Nitrogen and hydrogen
    • Carbon monoxide and nitrogen
    • All these

  6. On comparing with humic acid, fulvic acid has :
    • More hydrophilic group
    • Higher carbon and lower oxygen content
    • Higher molecular weight
    • More polymerized compounds

  7. Amino acids are positively charged :
    • At pH value above the isoelectric point
    • Under neutral pH
    • Under alkaline pH
    • At pH value below the isoelectric point

  8. Feldspars belong to the silicate mineral group.
    • Inosilicate
    • Cyclosilicate
    • Tektosilicate
    • Phyllosilicate

  9. Bacillus comes under the group.
    • Aerobes
    • Facultative anaerobes
    • Oligate anaerobes
    • Microaerobes

  10. Average chlorine content in plant tissue.
    • 0.1%
    • 20 mg/kg
    • 0.1 mg/kg
    • 100 mg/kg

  11. Smectite group consists of the following mineral/minerals :
    • Montmorillonite
    • Beidellite
    • Nontronite
    • All these

  12. White alkali soils have :
    • pH > 8.5
    • Neutral soluble salts
    • EC < 4.0 dS/m
    • ESP > 15% of CEC

  13. Which one of the following is an easily weathered mineral :
    • Feldspar
    • Quartz
    • Muscovite
    • Olivine

  14. The dominant mineral in shale is :
    • Clay
    • Quartz
    • Calcite
    • Feldspar

  15. The net effect of adding organic matter to acidic soils is generally an :
    • Increase or decrease in pH
    • Decrease in pH
    • Increase in pH
    • None of these

  16. Ammonium polyphosphate contain __________ % P2O5.
    • 48
    • 60
    • 28
    • None of these

  17. The contribution of organic matter of CEC is greatest for soils having :
    • High complexation of aluminium and iron
    • Minerals with high charge density
    • Low clay content
    • None of these

  18. Approximate half life of 2,4-D in soil is :
    • One month
    • One year
    • Six months
    • Five days

  19. Strontium-90 behaves in soil much the same as :
    • Potassium
    • Calcium
    • Magnesium
    • Iron

  20. Ammonium ion moves through the plasma membrane primarily by :
    • Active transport
    • Mass flow
    • Diffusion
    • All these

  21. SO4−2 adsorption capacity of the soil is decreased by :
    • Increased soil pH
    • Decreased P content
    • Decreased soil pH
    • None of these

  22. Major sources of atmospheric sulfur.
    • Oceans
    • Soils
    • Volcanic emissions
    • Soils and industry

  23. Deficiency of __________ element is expected in organic soils due to the formation of stable complexes with organic matter.
    • Zinc
    • Copper
    • Mn
    • Fe

  24. Available water is held in the soil against a pressure of upto approximately __________  bar.
    • 0.1
    • 0.3
    • 15
    • 31

  25. A soil to be designated as clay if it has a clay separate of :
    • Not less than 40%
    • > 30%
    • 30 - 35%
    • > 20%

  26. Particle density of soil is affected by :
    • Fineness of particle of a given mineral
    • Arrangement of soil solids
    • Organic matter content
    • All these

  27. Ionic radii of Al3+ is :
    • 0.39 Ã…
    • 0.50 Ã…
    • 0.64 Ã…
    • 0.41 Ã…

  28. NO3 reduction in plants is closely linked to :
    • Photosynthesis
    • Respiration
    • Fatty acid metabolism
    • All these

  29. Cation exchange capacity of chlorite is same as that of __________.
    • Montmorillonite
    • Illite
    • Vermicullite
    • None of these

  30. Nitrogenase enzyme consists of :
    • 8 protein complex
    • 2 protein complex
    • 6 protein complex
    • 4 protein complex

  31. Polyphenols are produced in soil during the mineralization of lignin.
    • Under aerobic conditions with pH > 5.5
    • Anaerobic environment
    • Acid conditions
    • Alkaline conditions

  32. The equilibrium constant Keq depends on :
    • Pressure
    • Temperature
    • Composition of the system
    • All these

  33. The three carbon compound formed by the reaction between CO2 and RUBP is :
    • G3P
    • Oxaloacetate
    • Malate
    • PGA

  34. Montmorillonite has a unit layer charge of :
    • 0.5
    • 1.0
    • 2.0
    • None of these

  35. Zeta potential can be reduced by :
    • Lowering of pH
    • Introducing multi charged ions
    • Adding simple salts
    • All these

  36. Which one of the following is a photosynthetic N fixing bacteria?
    • Azotobacter
    • Beijerinckia
    • Rhodospirillum
    • Clostridium

  37. The most abundant form of organic P compound in soil is :
    • Inositol phosphate
    • Phospholipid
    • Nucleic acid
    • Phosphoproteins

  38. The first study on legume - Rhizobium symbiosis conducted in India by :
    • Sen and Pal
    • V. Iswaran
    • N.V. Joshi
    • Boussingault

  39. Environmental Protection Act came into force in the year :
    • 1927
    • 1948
    • 1974
    • 1986

  40. The Universal Soil Loss Equation was developed by :
    • Wischmeier and Smith
    • Chepil and Woodruff
    • Sharma and Prasad
    • Dhruva Narayana

  41. The effective nuclear charge felt by the 4s electron of Mn atom is :
    • 3.25
    • 3.60
    • 5.1
    • 1.65

  42. 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.
    • Statement (V) is correct.
    • Statements (I) and (II) are correct.
    • Statements (I) and (IV) are correct.
    • Statements (I), (III) and (IV) are correct.

  43. The geometry of ClO3− ion as predicted by VSEPR theory is :
    • Trigonal Planar
    • Pyramidal
    • T shaped
    • Tetrahedral

  44. Choose the incorrect pair :
    • Sharp transition and fluorescence in lanthanides
    • d-d transition and colour of the compounds
    • Charge transfer and high molar absorption coefficient
    • High magnetic moment among lanthanides and Samarium (III)

  45. Al(CH3)3 is an example of :
    • A hard acid
    • A hard base
    • A soft acid
    • A soft base

  46. The non-aqueous solvent with longest liquid range is :
    • HF
    • NH3
    • N2O4
    • H2SO4

  47. In the pressure range 1 kPa to 100 kPa, the Hill constants for Hemoglobin and Myoglobin are :
    • 2.8 and 1.0 respectively
    • 1.0 and 3.0 respectively
    • 4.0 and 1.0 respectively
    • 1.0 and 4.0 respectively

  48. An old wooden stool was found to give 7.7 disintegrations g−1 min−1. If a fresh wooden material showed a C14 (t1/2=5730 years) activity of 15.4 disintegrations g−1 min−1, age of the sample is :
    • 3433 years
    • 8271 years
    • 5732 years
    • 9144 years

  49. Choose the odd function among the following :
    • cosx
    • x2 sinx
    • coshx
    • eix

  50. The Van Der Waals constants of a gas are : a=0.7 dm6 atm.mol−2 and b=0.02 dm3mol−1. The critical temperature of the gas is :
    • 65 K
    • 126 K
    • 0.06 K
    • 10.4 K

  51. Choose the incorrect relation from the following thermodynamic equations :

  52. 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 :
    • 12.79 mS m2 mol−1
    • 4.33 mS m2 mol−1
    • 2.31×10−4 S m2 mol−1
    • 50.5×10−4 S m2 mol−1

  53. 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 :
    • 1.38×103 s
    • 2×103 s
    • 6.02×102 s
    • None of these

  54. The correct order of efficacy for coagulating a lyophobic sol. is given by :
    • Mg2+ > Ba2+ > Ca2+ > Na+ > K+
    • Ba2+ > Mg2+ > Ca2+ > K+ > Na+
    • Ca2+ > Ba2+ > Mg2+ > K+ > Na+
    • Mg2+ > Ca2+ > Ba2+ > Na+ > K+

  55. The dissociation constant of acetic acid is 2×10-5 at 25° C. 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?
    • 5.8
    • 3.79
    • 4.25
    • None of these

  56. For the system :

    Nernst equation can be written as

  57. The correct IUPAC name of the compound A is :
    Compound A
    • (2R, 3R)-2, 3, 4-trihydroxybutanal
    • (2S, 3S)-2, 3, 4-trihydroxybutanal
    • (2R, 3S)-2, 3, 4-trihydroxybutanal
    • (2S, 3R)-2, 3, 4-trihydroxybutanal

  58. In the most stable conformation of trans-1-t-butyl-3-methylcyclohexane, the t-butyl group at C1 and methyl group at C3 are :
    • Equatorial and axial respectively
    • Axial and equatorial respectively
    • Equatorial and equatorial respectively
    • Axial and axial respectively

  59. Choose the correct statement(s) about [18]-Annulene.
    • [18]-Annulene is non-aromatic due to the non-planar structure
    • All the hydrogens are in the same environment as indicated by a singlet at δ (9.25 ppm) in 1H-NMR at room temperature
    • Six inner hydrogens are well shielded and shows an NMR signal at δ (−2.88 ppm)
    • There are two singlets in the NMR spectrum of [18]-Annulene at 100°C

  60. The reaction in which nitrene is not an intermediate is :
    • Curtius reaction
    • Arndt-Eistert reaction
    • Hoffman reaction
    • Schmidt reaction

  61. The reaction used for the conversion of an aldose into the next higher ketose is :
    • Wohl’s Method
    • Ruff’s Method
    • Wolfram’s Method
    • Sowden-Fischer Synthesis

  62. The intermediate associated with Wolff rearrangement reaction is :
    • Nitrene
    • Ketene
    • Carbene
    • Carbanion

  63. Which of the following vitamins and their deficiency diseases are not correctly matched?
    • Vitamin C - Scurvy
    • Vitamin B12 - Pernicious Anemia
    • Vitamin B4 - Pellagra
    • Vitamin B6 - Beri-beri

  64. The reaction used for the synthesis of α-amino acids is :
    • Schmidt reaction
    • Hoffman’s degradation reaction
    • Strecker’s synthesis
    • Carius method

  65. In the complexometric estimation of Ca2+, which of the following is a masking agent?
    • Cyanide ion
    • Eriochrome Black T
    • NH4Cl
    • NH4OH

  66. 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 :
    • 0.8×10−6 M
    • 0.01 M
    • 0.12 M
    • 8.33×10−6 M

  67. The number of significant figures in the following measurement is : Temperature=0.0045°C
    • 4
    • 2
    • 5
    • 1

  68. 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.
    • All the statements are correct
    • Statements (I) and (IV) are correct
    • Statements (I) and (III) are correct
    • Statements (II) and (IV) are correct

  69. The sharp band at wavelength 528 nm in the UV - Vis absorption spectra of KMnO4 can be attributed to :
    • LMCT transition
    • d-d transition
    • MLCT transition
    • Jahn-Teller distortion

  70. The correct order of decreasing vibrational frequency for C–Cl, C–C, C–Br, C–H and C–O is :
    • C–Br, C–Cl, C–O, C–H, C–C
    • C–O, C–H, C–Br, C–Cl, C–C
    • C–Cl, C–Br, C–O, C–C, C–H
    • C–H, C–C, C–O, C–Cl, C–Br

  71. 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 :
    • The two Cl atoms are cleaved easily
    • The hydrogens can be cleaved easily
    • Cl has two isotopes
    • Cl has three isotopes

  72. A 1H–NMR spectrum of compound contains a singlet, a triplet and a quartet peaks. Choose the possible compound from the following :
    • CH3CH2CH2CHCl2
    • CH3CCl2CH2CH3
    • CH3CH2CHClCHCl2
    • CH3CHClCHClCH3

  73. 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
    • All are correct
    • Only (III) is correct
    • (I) and (II) are correct
    • (II) and (III) are correct

  74. Which of the following is an auxochrome?
    • –OH
    • –NO2
    • –N=N–
    • –N=O

  75. The compound showing insecticidal properties is :
    • hexachlorobenzene
    • β-hexachlorocyclohexane
    • γ-hexachlorocyclohexane
    • θ-hexachlorocyclohexane

  76. Which of the following is NOT a function of a food additive?
    • Maintaining the product taste
    • Keeping the nutritive value
    • Controlling the pH
    • None of these

  77. The antibiotic effect of sulfadrugs is due to :
    • The presence of sulphur which is an antibiotic
    • Their structural similarity with p-aminobenzoic acid amide
    • Their ability to burst the cell walls of bacteria
    • Their reaction with folic acid

  78. Identify a molecule which can be used as soap :
    • Calcium palmitate
    • Potassium adipate
    • Magnesium linoleate
    • Sodium stearate

  79. Which of the following is saccharin?

  80. The condition in which the ratio of chemical nutrients in ecosystem increases beyond optimal value is known as :
    • Bioaccumulation
    • Eutrophication
    • Biomagnification
    • Pollution

  81. Which state in India is the largest producer of saffron?
    • Jammu and Kashmir
    • Sikkim
    • Himachal Pradesh
    • Gujarat

  82. Which one of the following is NOT a basic feature of the Indian Constitution?
    • Parliamentary form of Government
    • Federal Government
    • Independence of Judiciary
    • Presidential form of Government

  83. Who is the present Chairman of NITI Aayog?
    • Mr. Rajiv Kumar
    • Shri Narendra Modi, The Prime Minister
    • Dr. Bibek Debroy
    • Prof. Ramesh Chand

  84. Who presided over the Surat Session of the Indian National Congress?
    • Rashbehari Ghosh
    • Dadabhai Naoroji
    • W.C. Banerji
    • Gopalakrishna Gokhale

  85. In which language Gandhiji published the paper Harijan?
    • Gujarati
    • Hindi
    • English
    • Urdu

  86. On which date Prime Minister Shri Narendra Modi announced, Ayushman Bharat Health Insurance Scheme?
    • 25th September, 2018
    • 15th August, 2018
    • 22nd October, 2018
    • 23rd September, 2018

  87. Who built the Dutch Palace at Mattancherry in 1555?
    • The Dutch East India Company
    • The French East India Company
    • The English East India Company
    • The Portuguese

  88. The most important lake in North Kerala is :
    • Kavvayi lake
    • Vembanad lake
    • Kayamkulam lake
    • Sastham Kotta lake

  89. Which Travancore ruler, shifted the Capital of Travancore from Padmanabhapuram to Thiruvananthapuram?
    • Marthanda Varmma
    • Gowri Parvathi Bhai
    • Balarama Varmma
    • Dharma Raja

  90. In which year was Ancharakandy Cinnamon estates established?
    • 1700
    • 1789
    • 1767
    • 1800

  91. In which works Chattampi Swamikal has expressed his profound faith in Ahimsa or non-violence?
    • Adi Bhasha
    • Advaita Chinta Paddhati
    • Kristu Matanirupanam
    • Jivita Karunyanirupanam

  92. The first of the temples consecrated by Sri Narayana Guru was at :
    • Aruvippuram in Neyyattinkara
    • Jaganath Temple, Tellicherry
    • Advaita Asramam at Alwaye
    • Sarada Matam, Shivagiri

  93. Chirayankizh Taluk Muslim Samajam was founded by :
    • Ali Musliyar
    • Kalathingal Muhammed
    • Vakkom Abdul Khadar Maulavi
    • Muhammed Abdu Rahiman

  94. In which year Kuriakose Chavara established CMI Church at Mannanam?
    • 1871
    • 1831
    • 1805
    • 1806

  95. ‘Kallumala Samaram’ an agitation under the leadership of Shri Ayyankali took place at :
    • Veganoor
    • Oorattambalam
    • Changanasseri
    • Perinad

  96. Who is the architect of ‘Statue of Unity’, world’s tallest statue built at Kevadiya in Gujarat?
    • B.V. Dhoshi
    • R.V. Suthar
    • Anupama Kundoo
    • Raj Rewal

  97. Who is the present Chief Minister of Sikkim?
    • Pawan Kumar Chamling
    • Sarbananda Sonowal
    • Nongthombam Biren Singh
    • Jai Ram Thakur

  98. Who won the ONV Literary Award for the year 2018?
    • Sugatha Kumari
    • M. Mukundan
    • M.T. Vasudevan Nair
    • Subhash Chandran

  99. Who has won the women’s singles title in the Australian open, 2018?
    • Serena Williams
    • Venus Williams
    • Simona Halep
    • Caroline Wozniacki

  100. Who is the director of the film ‘Kayamkulam Kochunni’?
    • Nivin Pauly
    • R. Sukumaran
    • Roshan Andrews
    • Lal Jose

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