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General Science MCQ

General Science MCQ Practice

Practice General Science questions with instant scoring, correct answer highlighting, detailed solutions and first-click AI explanation caching for missing explanations.

📚 Questions: 553 🧭 Page: 8 / 56 🎯 10 per page
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Q. 3903
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The only snake that builds its nest is:
  • A Krait
  • B King cobra
  • C Chain viper
  • D Saw scaled viper
Correct Option: B  [ King cobra ]
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Q. 3902
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Cow milk is a rich source of:
  • A Vitamin A
  • B Vitamin B
  • C Vitamin C
  • D Vitamin D
Correct Option: B  [ Vitamin B ]
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Q. 3901
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Acupuncture is a medical system of treatment in which:
  • A herbs are used to relieve pain
  • B needles are inserted into particular parts of the body to relieve pain
  • C surgery is done to relieve pain
  • D none of these
Correct Option: B  [ needles are inserted into particular parts of the body to relieve pain ]
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Q. 3900
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SA-node of mammalian heart is known as :
  • A Autoregulator
  • B Pace-maker
  • C Time controller
  • D Beat regulator
Correct Option: B  [ Pace-maker ] Stored explanation
Correct option: B — Pace-maker
  • The SA node generates rhythmic electrical impulses that set the heart rate, acting as the natural “pacemaker.”
  • Key concept: automaticity and rhythmic rhythm generation in the sinoatrial node.
  • Why others are wrong: Autoregulator, Time controller, and Beat regulator are not standard terms for initiating heartbeats.
  • Exam tip: Remember “SA node = pace-maker” as the primary initiator of heartbeat. No formula needed.
Q. 3867
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The element used for vulcanizing rubber is:
  • A sulphur
  • B bromine
  • C silicon
  • D phosphorus
Correct Option: A  [ sulphur ] Stored explanation
Correct answer: A
  • Why: Vulcanization uses sulfur to form cross-links (C–S–C) between polymer chains, improving elasticity and heat resistance of rubber.
  • Key concept: Cross-linking in polymers; sulfur forms polysulfide bridges with polyisoprene chains.
  • Formula/numerical note: S8 rings break and create S–C bonds to link chains; no numerical calculation needed here.
Q. 3866
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Lens is made up of:
  • A pyrex glass
  • B flint glass
  • C ordinary glass
  • D cobalt glass
Correct Option: B  [ flint glass ]
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Q. 3865
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The phenomenon of light associated with the appearance of the blue Colour of the sky is:
  • A interference
  • B reflection
  • C refraction
  • D scattering
Correct Option: D  [ scattering ]
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Q. 3864
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'Mirage' is an example of:
  • A refraction of light only
  • B total internal reflection of light only
  • C refraction and total internal reflection of light
  • D dispersion of light only
Correct Option: C  [ refraction and total internal reflection of light ]
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Q. 3863
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Which part is modified as the tusk of elephant?
  • A canine
  • B premolar
  • C second incisor
  • D molar
Correct Option: C  [ second incisor ]
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Q. 3862
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Which amongst the following is the largest mammal?
  • A elephant
  • B whale
  • C dinosaur
  • D rhinoceros
Correct Option: B  [ whale ]
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