UPSC EPFO (AO/EO) Exam Paper 05 Sep 2021 (Answer Key)

101. Which one of the following is not a female reproductive organ in humans?
(a) Ovaries
(b) Oviducts
(c) Cervix
(d) Stamen

102. Which one of the following cannot be called “Amphibian of the Plant Kingdom” ?
(a) Spirogyra
(b) Riccia
(c) Funaria
(d) Marchantia

103. Which one of the following is not a consequence of deforestation ?
(a) Increased groundwater table
(b) Decreased biodiversity
(c) Increased soil erosion
(d) Decreased rainfall

104. Which one of the following chromosomes has a mismatched pair in a normal human male ?
(a) Chromosome number 21
(b) Chromosome number 18
(c) X-chromosome
(d) Chromosome number 13

105. The word Vaccine’ has been derived from a Latin word having meaning
(a) Antibody
(b) Immunity
(c) Cow
(d) Guinea pig

106. Which one of the following statements is true with regard to the image formation by two eyes of a person ?
(a) Both the eyes see exactly the same image.
(b) One eye sees half portion of the object.
(c) Both the eyes combine the two images seen by them.
(d) Each eye sees a slightly different image.

107. Which one of the following statements is correct? Wavelength of microwaves ranges between
(a) infrared waves and radio waves.
(b) visible waves and infrared light.
(c) γ-rays and X-rays.
(d) X-rays and visible waves.

108. Which one of the following is the size of hydrogen atom ?
(a) 10^-10 m
(b) 10 μm
(c) 10 mm
(d) 1000 Å

109. Which one of the following statements regarding force is correct ?
(a) A positive force implies attractive nature.
(b) A negative force implies repulsive nature.
(c) A positive force can be both attractive and repulsive in nature.
(d) A negative force implies attractive nature.

110. When a dielectric material is kept in an external electric field, which one of the following phenomena may be realized ?
(a) Magnetization
(b) Polarization
(c) Photoionization
(d) Circularization

111. Which one of the following substances, when added to water, will not change the pH ?
(a) NaHCO₃
(b) NH₄Cl
(c) Na₂CO₃
(d) NaCl

112. Which one of the following, on adding to water, will not scatter a beam of light?
(a) Copper sulphate
(b) Chalk powder
(c) Milk
(d) Ink

113. Which one of the following will not be reduced by metallic zinc ?
(a) Cu²⁺
(b) H⁺
(c) Ag⁺
(d) Al³⁺

114. Who among the following discovered Proton ?
(a) J.J. Thomson
(b) E. Goldstein
(c) E. Rutherford
(d) J. Chadwick

115. Consider the following balanced equation :
CO (g) + 2H₂ (g) ——-→ CH₃OH (l)
How many moles of CH3OH (l) can be obtained by reacting 2.0 mole of CO (g) with 2.0 mole of H2 (g) ?
(a) 1
(b) 2
(c) 3
(d) 4

116. Which one of the following pairs of Zonal Railways and their Headquarters is not correctly matched ?
(a) Central — Nagpur
(b) Eastern — Kolkata
(c) Western — Mumbai
(d) Northern — New Delhi

117. Tri-service contingent of which one of the following countries participated in India’s Republic Day parade in 2021 ?
(a) Myanmar
(b) Nepal
(c) Bhutan
(d) Bangladesh

118. Which one of the following does not figure in the list of languages in the Eighth Schedule of the Constitution of India ?
(a) Dogri
(b) Bhoti
(c) Maithili
(d) Santhali

119. As a routine exercise, Operations ‘Garam Hawa’ and ‘Sard Hawa’ are conducted by
(a) BSF
(b) ITBP
(c) CRPF
(d) CISF

120. Who among the following was the founder of Swatantra Party ?
(a) C. Rajagopalachari
(b) Deen Dayal Upadhyaya
(c) Shyama Prasad Mukherjee
(d) Acharya Narendra Dev

 

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