WBCS Mains 2017 Answer Keys Paper IV



WBCS Mains 2017-Answer Key/ Paper IV/ Test Booklet Series  A
For Question Paper go to: WBCS-mains-2017-question-paper of Paper IV (Test Booklet Series A)

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WBCS Mains 2017 Answer Key GS Paper IV Test Booklet Series A

1.B 48A

2.D Methyl isothiocyanate (Should be MIC-Methyl isocyanate)

3.D Union of States

4.D Article 32

5.C Shah Commission

6.A Diamonds (India is highest polished diamond exporter whereas India imports unpolished diamond)

7.C 75:25

8.C Thermal

9.C Paradeep

10.C Foreign Currency Assets

11.B Student demands for individual rights

12.C French Revolution

13.D Ascension Day: Ascension of Father Saint Paul

14.D Minnesota

15.C Chandrasekhar

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16.B Modernisation of the nation’s industry

17.A Abraham Lincoln

18.D 1815


19.D Poland

20.D Jesus Christ

21.B China

22.C Thomas More

23.A Trusteeship Council

24.A ILO

25.C First Sermon



26.D Bharatnatyam

27.D Ahmed Jan Thirkuwa

28.B 1953(Resolution taken on 1952, inaugurated in 1953)

29.A Dayanand Saraswati

30.B People of India

31.D None of the above

32.’Date of formation’ wise: C and D incorrect, ‘Date of report submission’ wise B and D incorrect. So PSC will decide the answer.

33.B Mandamus

34.C Percentage of India’s Population to World Population: 16 Percent

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35.Virgin Island has two parts. They are dependency of British as well as USA. So, again PSC will decide.
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36.B Napoleon Bonaparte

37.B Belgium

38.C Part IVA



39.D President of India

40.26th

41.C July 12, 2010

42.B Manmohan Singh

43.C The Indian Ocean

44.D B. N. Srikrishna

45.B Mumbai Terror Attacks

46.A INS Kamorta

47.D Hundred Twenty eight

48.A February 2010 (Launched on feb,2010 but the team started on Nov 2010).

49.C Julia Gillard

50.C Durban



51.A Dilip Kumar

52.B Mobo Money

53.C Shani

54.B Gujarat

55.C Both of the Above ( Public Health Foundation of India and International Food Policy Research Institute)

56.B Philippines

57.C Madhya Pradesh

58.C Sikkim

59.D All of the above

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60.Democratic Ulster Unionist Party(DUP) of Northern Ireland

61.B Rafael Nadal

62.C Pakistan



63.** Women’s World Cup in hockey in 2018 is scheduled to be held in England. No such tournament played in 2017.

64.B Bill Clinton

65.D 20.01.2017

66.C Tunisia

67.D 80 pc of total employment in India in 2016

68.B Uttar Pradesh

69.A European Court of Justice

70.B USA pulling out of Paris Accord

71.A Health (a fecal incontinence developed by Department of Biotechnology (DBT), Ministry of Science & Technology)

72.D All of the above

73.A Agasthyamalai biosphere reserve

74.B Varanasi

75.C Serena Williams



76.C Phillip Pullman

77.A Rana Dasgupta

78.C Qatar

79.D Article 167 (C and D both are very close and seems to be related with the event)

80.B Shankha Ghosh (Asked in our mock test)

81.C Boeing

82.A Kaushik Basu

83.C MKU Limited

84.A Air India

85.D Moisture content in the air

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86.C Barium diphenyl amine sulphonate

  1. D Thermosphere

88.C West Bengal

89.A Fractional distillation

90.C Kalpakkam

91.D Coffee

92.B Sikkim

93.A NH-6

94.C Thermal Power Plants

95.B 10-9m



96.C Magnetic flux

97.B Centrifugal force

98.D 24 hours

99.B Cavendish

100.A Otto cycle (though B, diesel cycle is also used in internal combustion engines)

101.B Frequency modulation

102.B Mercury Vapour Lamp

103.C the electric field between the plates

104.A Steady Currents

105.B Low hysteresis loss and high permeability

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106.A Ferrimagnetic

107.C BCT

108.B Telephone

109.U235

110.A Doped semiconductors

111.C Combination of analog and digital circuits

112.A 30-300 MHz

113.B C-DAC

114.C Operating system

115.A System



116.C A set of instruction for your computer

117.D Zinconium

118.B Muriatic Acid

119.B Ni

120.D All of the above

  1. D LPG

122.B Water Gas

123.A F2

124.C 2.53g/cc

125.A Trigonal

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126.A Syneresis

127.C Sodium Benzoate

128.A Iron

129.B Quartz, Clay and Feldspar

130.D All of the above

131.D Si

132.B Iron & Steel Plants

133.C U(Uranium)

134.A Bayer’s process

135.D Pt

136.A Cu+Sn

137.B Curie Point

138.A Fe+Cr+Ni

139.C Calcium and Sodium silicate

140.B CH4



141.C I2

142.D HF

143.A Orthoclase

144.B Specific surface area

145.A 1723⁰C

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146.C Rutile

147.C Ethylene

148.D Saturated hydrocarbons

149.C Ammoniacal Silver Nitrate

150.A Isoprene



151.D None of the above

152.A Burning coal

153.D Alumina

154.A Asbestos

155.D Seed

156.C Linnaeus

157.A Leeuwenhoek

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158.D Algae

159.A Azola

160.B Phototropism

161.A Starch

162.C Deficiency of oxygen

163.A Fungus

164.D Birds

165.C Histology



166.B Nymph

167.C 100 um(the almost average of the range 17-181 um)

168.A Bentonite

169.A Agro industry

170.A Free energy

  1. D Fluorocarbon

172.C Biodegradable pollution ( The question is a bit confusing as other options can’t be ruled out)

173.C Lead

174.B 1928

175.B Football

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176.D Polo

177.C <2eV
178.A Optical glass

179.A R-Mg-X

180.C Red Dye

181.D Microwave

182.? All are transitional metal. So PSC will decide the answer.

183.? Answer should be 1

184.A ℽ-BHC

185.B Co60



186.C Zeiglar-Natta catalyst

187.B Condensation polymerization

188.C 10

189.C GHz

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190.B CO2

191.C  ∆G<0

192.B >90⁰

193.C the ratio of the sine of the angles of incidence and refraction of light is constant when it passes between two given media

194.A x axis : y axis

195.B 6%

196.B 2.24



197.A 25W Bulb will fuse

198.D 4⁰C

199.C 0.74

200.D MnO2

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