Kerala PSC Previous Years GS Question Bank Part 5

Kerala PSC Previous Years General Science Question Bank in English Part 3

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• 101. The control rods used in nuclear reactor are made of ?
• A) Barium
  B) Graphite
  C) Cadmium
  D) Antimony
• Answer
• C) Cadmium
• Explanation

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• 102. The only person who got Nobel prize for Physics twice ?
• A) Frederick Sanger
  B) William Shockley
  C) John Bardeen
  D) Walter Brattain
• Answer
• C) John Bardeen
• Explanation

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• 103. A frog with body Temperature of 20°C is transferred to an area with 30°C temperature. What will be the temperature of frog in the new Environment ?
• A) 20°C
  B) 30°C
  C) 25°C
  D) Fluctuates between 20°C to 30°C
• Answer
• B) 30°C
• Explanation

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• 104. A farmer applied a hormone to his rice plants and the plant grew abnormally tall. Which of the following do you think, was the hormone ?
• A) Auxin
  B) Gibberellin
  C) Ethylene
  D) Cytokinin
• Answer
• A) Auxin

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• 105. The organ in our body with out muscle is
• A) heart
  B) lungs
  C) kidney
  D) liver
• Answer
• B) Lungs
• Explanation

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• 106. Dermatology is the study of
• A) heart
  B) eyes
  C) skin
  D) nose
• Answer
• C) Skin
• Explanation

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• 107. Which of the following protect us from cold ?
• A) Vitamin
  B) Protein
  C) Fat
  D) Carbohydrates
• Answer
• C) Fat
• Explanation

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• 108. Most chemically active element is
• A) fluorine
  B) hydrogen
  C) osmium
  D) lithium
• Answer
• A) Fluorine
• Explanation

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• 109. PH value from 0 to 7 indicates that is
• A) salt
  B) water
  C) acid
  D) base
• Answer
• C) Acid
• Explanation

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• 110. Atoms with different atomic number and mass number, having same number of neutron are called
• A) isotopes
  B) isobars
  C) isohytes
  D) isotones
• Answer
• D) isotones
• Explanation

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• 111. Sound with intensity greater than ---------- causes sound pollution
• A) 70 db
  B) 50 db
  C) 80 db
  D) 90 db
• Answer
• D) 90 db
• Explanation

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• 112. Colour of soap bubbles are due to
• A) refraction
  B) defraction
  C) interference
  D) reflection
• Answer
• C) Interference
• Explanation

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• 113. What is the talc used in Talcum Powder ? 
• A) Calcium Carbonate
  B) Magnesium Carbonate
  C) Hydrated Magnesium Silicate
  D) Zinc Sulphate
• Answer
• C) Hydrated Magnesium Silicate
• Explanation

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• 114. Which of the following is a Vitamin Deficiency Disease ? 
• A) Goitre
  B) Typhoid
  C)  Kwashiorkor
  D) Beriberi
• Answer
• D) Beriberi
• Explanation

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• 115. The irregular and partial refraction of light ray in a medium is known as 
• A) Scattering
  B) Dispersion
  C) Interference
  D) Diffraction
• Answer
• B) Dispersion
• Explanation

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• 116. About 90 percentage of Sun is made up of ? 
• A) Oxygen
  B) Helium
  C) Nitrogen
  D) Hydrogen
• Answer
• D) Hydrogen
• Explanation

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• 117. Glass known as optical glass ? 
• A) Fibre Glass
  B) Soft Glass
  C) Flint Glass
  D) Safety Glass
• Answer
• A) Fibre Glass
• Explanation

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• 118. In which light the rate of Photosynthesis is maximum ?
• A) Blue
  B) Yellow
  C) Red
  D) Green
• Answer
• C) Red
• Explanation

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• 119.Which type of lenses are prescribed for the correction of astigmatism of human eye?
• A) convex
  B) Plane
  C) concave
  D) cylindrical
• Answer
• Correct Option : D
• Explanation

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• 120. Permanent hardness of water may be removed by the addition of
• A) Lime
  B) Alum
  C) Potassium permanganate
  D) Sodium Carbonate
• Answer
• Correct Option : D
• Explanation

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• 121. Which of the following is not a natural fibre?
• A) Coir
  B) Silk
  C) Rayon
  D) Jute
• Answer
• Correct Option : C
• Explanation

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• 122. The SI Unit of energy is
• A) Newton
  B) Joules
  C) Ampere
  D) Erg
• Answer
• Correct Option : B
• Explanation

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• 123. Fizzy soft drinks usually contain?
• A) Hydrochloric Acid
  B) Nitric Acid
  C) Carbonic Acid
  D) Phosphoric Acid
• Answer
• Correct Option : D
• Explanation

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• 124. The scientific study of beauty is called ?
• A) Ethics
  B) Synthesis
  C) Aesthetics
  D) Dialectics
• Answer
• Correct Option : C
• Explanation

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• 125. Which of the following is not a noble gas?
• A) Argon
  B) Radon
  C) Neon
  D) Oxygen
• Answer
• Correct Option : D
• Explanation

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