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Past Papers MCQs

GSA

2017

MCQs

Question 1
The gas used for artificial ripening of green fruit is:
  • Ethylene
  • Ethane
  • Carbon dioxide
  • Acetylene
Explanation: Ethylene is a natural plant hormone used to accelerate the ripening of fruits.
Question 2
The largest planet in the solar system is:
  • Moon
  • Venus
  • Jupiter
  • Sun
Explanation: Jupiter is the largest planet in the solar system by size and mass.
Question 3
Sulfuric acid was prepared by:
  • Priestley
  • Peregrine Phillips
  • Jabir bin Hayyan
  • None of these
Explanation: Jabir bin Hayyan is credited with the early preparation and study of sulfuric acid.
Question 4
The name of the disease called lockjaw is:
  • Arthritis
  • Hypertrophy
  • Tetanus
  • None of these
Explanation: Tetanus causes severe muscle stiffness, particularly in the jaw, hence called lockjaw.
Question 5
The longest and largest bone in the human body is:
  • Spinal cord
  • Humerus
  • Fibula
  • Femur
Explanation: The femur is the longest and strongest bone in the human body.
Question 6
The branch of physics which deals with atomic nuclei is called:
  • Nuclear physics
  • Atomic physics
  • Particle physics
  • Modern physics
Explanation: Nuclear physics focuses on the structure and behavior of atomic nuclei.
Question 7
Sonar is used to measure:
  • The speed of sound
  • Ocean depth
  • Water properties of temperature
  • None of these
Explanation: Sonar determines ocean depth by measuring the time it takes for sound waves to return.
Question 8
The stone used in whitewash is:
  • Limestone
  • Sandstone
  • Granite
  • None of these
Explanation: Limestone is processed into lime, which is used in whitewashing walls.
Question 9
Radar receives waves called:
  • Electromagnetic waves
  • Mechanical waves
  • Radio waves
  • None of these
Explanation: Radar uses radio waves to detect and locate objects.
Question 10
Plaster of Paris is obtained from:
  • Brochantite
  • Gypsum
  • Chalcanthite
  • None of these
Explanation: Plaster of Paris is produced by heating gypsum.
Question 11
Phosphorus helps plant growth of:
  • Leaves
  • Seeds
  • Roots
  • None of these
Explanation: Phosphorus promotes root development and energy transfer in plants.
Question 12
The blue color of the sky is due to:
  • Rayleigh scattering
  • Mie scattering
  • Sky saturation
  • None of these
Explanation: Shorter wavelengths of light scatter more, making the sky appear blue.
Question 13
Newspaper can be recycled:
  • 5 to 7 times
  • 5 times
  • 4 times
  • None of these
Explanation: Paper fibers can typically be recycled 5 to 7 times before degrading.
Question 14
Blood clotting happens in which part of the human body?
  • Veins
  • Heart
  • Brain
  • None of these
Explanation: Blood clotting occurs within blood vessels (both veins and arteries), not a single listed organ.
Question 15
The lens used to correct short-sightedness is:
  • Concave polygon
  • Concave prescription lenses
  • Concave mirror
  • None of these
Explanation: Concave lenses diverge light rays to correct myopia (short-sightedness).
Question 16
The catalyst to convert oil into ghee is:
  • Nickel
  • Aluminum isopropoxide
  • Phosphonium borate
  • None of these
Explanation: Nickel acts as a catalyst in hydrogenation, converting oil into ghee.
Question 17
The conversion of oil into ghee is:
  • Crystallization
  • Hydrogenation
  • Oxidation
  • None of these
Explanation: Hydrogenation adds hydrogen to unsaturated fats, converting oil into semi-solid ghee.
Question 18
In a certain code language, COMPUTER is written as RFUVQNPC. How will MEDICINE be written in the code language?
  • MFEDJJOE
  • EOJDJEFM
  • MFEJDJOE
  • EOJDJEFM
Explanation: The coding pattern involves shifting letters and reversing the sequence, yielding EOJDJEFM for MEDICINE.
Question 19
A told B that C is his father’s nephew. D is A’s cousin but not C's brother. What relationship is there between D and C?
  • Father
  • Cousin and sister
  • Mother
  • Aunt
Explanation: C and D are cousins, and since D is not C’s brother, D is female (sister).
Question 20
It takes Ali 30 minutes to mark a paper. Aslam only needs 25 minutes to mark a paper. If they both start marking papers at 11:00 AM, at what time will they finish marking papers at the same time?
  • 12:30 PM
  • 12:45 PM
  • 1:30 PM
  • None of these
Explanation: The LCM of 30 and 25 minutes is 150 minutes, so both finish together at 1:30 PM.