PSC Previous Years GS Questions Part 15

PSC General Science Questions Part 15

• [accordion]
• 351. Who invented the structure of an atom ?
• A) Mendaleev
  B) Neils Bhor
  C) Cavandish
  D) None of these
• Answer
• Correct Option : B
• Explanation

• [accordion]
• 352. The pollutant which gives rise to acid rain is?
• A) SO2
  B) SO3
  C) NO2
  D) NO3
• Answer
• Correct Option : A
• Explanation

• [accordion]
• 353. Mumps is a disease caused by?
• A) Fungus
  B) Bacterium
  C) Virus
  D) None of these
• Answer
• Correct Option : C
• Explanation

• [accordion]
• 354. Which one of the following enzymes is found in human saliva?
• A) Typsin
  B) pepsin
  C) ptyalin
  D) Rennin
• Answer
• Correct Option : C
• Explanation

• [accordion]
• 355. The development of the Ultramicroscope makes use of the?
• A) Edison effect
  B) Tyndall effect
  C) Brownian motion
  D) Zeeman effect
• Answer
• Correct Option : B
• Explanation

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• [accordion]
• 356. Focus of the lens of eye adjusted by......?
• A) Retina
  B) Pelliary muscles
  C) Cornea
  D) Lens
• Answer
• Correct Option : B
• Explanation

• [accordion]
• 357. The most suitable conductor is?
• A) Saline water
  B) Fresh water
  C) Pure water
  D) None of these
• Answer
• Correct Option : A
• Explanation

• [accordion]
• 358. The SI unit of magnetic induction is?
• A) tesla
  B) henry
  C) gauss
  D) oersted
• Answer
• Correct Option : A
• Explanation

• [accordion]
• 359. Parsec is the unit of
• A) Density
  B) Distance
  C) Momentum
  D) Time
• Answer
• Correct Option : B
• Explanation

• [accordion]
• 360. Detergents are Sodium or Potassium salts of
• A) Carboxylic acids
  B) Adipic acid
  C) Sulphonic acid
  D) None of these
• Answer
• Correct Option : C
• Explanation

• [accordion]
• 361. Thiokol is a
• A) Vulcanised rubber
  B) Raw rubber
  C) Natural rubber
  D) Synthetic rubber
• Answer
• Correct Option : D
• Explanation

• [accordion]
• 362. A protein solution on warming with concentrated nitric acid may turn yellow called?
• A) Xanthoproteic test
  B) Biuret test
  C) Millions test
  D) Hopkins cole test
• Answer
• Correct Option : A
• Explanation

• [accordion]
• 363. The Washing Soda is?
• A) Sodium Hydroxide
  B) Potassium Hydroxide
  C) Sodium Carbonate
  D) Calcium Carbonate
• Answer
• Correct Option : C
• Explanation

• [accordion]
• 364. The essential Vitamin for the functioning of reproduction?
• A) Vitamin A
  B) Vitamin B
  C) Vitamin C
  D) Vitamin E
• Answer
• Correct Option : D
• Explanation

• [accordion]
• 365. Typhoid fever is caused by?
• A) Virus
  B) Allergy
  C) Fungus
  D) Bacteria
• Answer
• Correct Option : D
• Explanation

• [accordion]
• 366. The effects of hormones on the body is?
• A) Stimulation of organs
  B) Catalytic functions
  C) Proper growth
  D) Co ordination of functions of different organs
• Answer
• Correct Option : A
• Explanation

• [accordion]
• 367. The chemical name of quartz is?
• A) Calcium oxide
  B) Calcium phosphate
  C) Sodium phosphate
  D) Sodium silicate
• Answer
• Correct Option : D
• Explanation

• [accordion]
• 368. `Lock Jaw` is difficulty in opening the mouth is symptom of?
• A) Plague
  B) Tetanus
  C) Cholera
  D) None of these
• Answer
• Correct Option : B
• Explanation

• [accordion]
• 369. The longest cell in the human body?
• A) Neuron cell
  B) Epithelial cell
  C) RBC
  D) Beta cell
• Answer
• Correct Option : A
• Explanation

• [accordion]
• 370. Colouring substance present in bile is?
• A) Haemoglobin
  B) Melanin
  C) Bilirubin
  D) Xanthophyll
• Answer
• Correct Option : C
• Explanation

• [accordion]
• 371. Hormone which helps in ripening of fruits?
• A) Cytokinin
  B) Gibberllins
  C) Florigens
  D) Ethylene
• Answer
• Correct Option : D
• Explanation

• [accordion]
• 372. Bronze is an alloy of ?
• A) Copper and Zinc
  B) Copper and Aluminium
  C) Copper and Tin
  D) Copper and Nickel
• Answer
• Correct Option : C
• Explanation

• [accordion]
• 373. Deficiency of Vitamin ____ affects the reproductive organs and causes sterility?
• A) D
  B) E
  C) A
  D) C
• Answer
• Correct Option : B
• Explanation

• [accordion]
• 374. Device used for detecting even feeble current?
• A) Induction Coil
  B) Choke
  C) Transformer
  D) Galvanoscope
• Answer
• Correct Option : D
• Explanation

• [accordion]
• 375. The sun`s heat and light energy reaches earth by?
• A) Conduction
  B) Convection
  C) Reflection
  D) Radiation
• Answer
• Correct Option : D
• Explanation

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