General Science Questions (MCQs) for Competitive Examinations

General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App

1. Which of the following elements is present in heavy water?
[A] Heavy Oxygen
[B] Heavy Hydrogen
[C] Heavy Chlorine
[D] Heavy Nitrogen

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2. Identify the process from the options below, which is a physical change?
[A] Oxidation
[B] Reduction
[C] Sublimation
[D] Decomposition

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3. Which of the following makes the skin layer impervious to water?

[A] Melanin
[B] Collagen
[C] Keratin
[D] Chitin

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4. Leptospirosis is a disease caused by ____:
[A] Fungus
[B] Protozoa
[C] Virus
[D] Bacteria

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5. Which of the following structures are present in the throat to prevent the air passage from collapsing?
[A] Rings of cartilage
[B] Rings of muscle
[C] Rings of bone
[D] Rings of connective tissue

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6. Which one of the following is the smallest endocrine gland in human body?
[A] Pancreas
[B] Thyroid
[C] Pituitary
[D] Adrenal

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7. In the grass lands, trees do not replace the grasses as a part of an ecological succession because of ____:
[A] Limited sun light and paucity of nutrients
[B] Insect and fungi
[C] Water limits and fire
[D] None of the above

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8. Which of the following brings back deoxygenated blood from different parts of human body to heart?
[A] Veins
[B] Arteries
[C] Nerves
[D] Lungs

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9. Consider the following statements about how plants absorb nitrogen:

  1. Plants absorb nitrogen in the form of inorganic nitrates or nitrites.
  2. Plants take in nitrogen in the form of organic compounds.
  3. Nitrogen is directly taken up by the plants from the atmosphere.

Which of the above statements is / are correct?

[A] Only 1 and 2
[B] Only 1 and 3
[C] Only 2 and 3
[D] All of these

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10. Osteocytes are found in ____:
[A] Blood
[B] Bone
[C] Lymph
[D] Cartilage

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