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AFCAT Science — practice by topic

Browse 91 questions across 2 Science topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Science topics

Environmental & Disaster Management (62)Science & Technology (29)

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Consider the following: I. Cigarette butts II. Eyeglass lenses III. Car tyres How many of them contain plastic?Read the answer and worked solution →Artificial way of causing rainfall to reduce air pollution makes use ofRead the answer and worked solution →The organisms "Cicada, Froghopper and Pond skater" are :Read the answer and worked solution →Which one of the following shows a unique relationship with an insect that has coevolved with it and that is the only insect that can pollinate this tree?Read the answer and worked solution →

Worked practice questions

Consider the following: I. Cigarette butts II. Eyeglass lenses III. Car tyres How many of them contain plastic?

  1. Only one
  2. Only two
  3. All the three
  4. None
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Correct answer: C. All the three

UPSC CSE Prelims 2025 (GS-I, Set A), Q.44. Official answer key: C.

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Artificial way of causing rainfall to reduce air pollution makes use of

  1. silver iodide and potassium iodide
  2. silver nitrate and potassium iodide
  3. silver iodide and potassium nitrate
  4. silver nitrate and potassium chloride
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Correct answer: A. silver iodide and potassium iodide

UPSC CSE Prelims 2025 (GS-I, Set A), Q.85. Official answer key: A.

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The organisms "Cicada, Froghopper and Pond skater" are :

  1. Birds
  2. Fish
  3. Insects
  4. Reptiles
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Correct answer: C. Insects

Answer: C. Cicada, Froghopper and Pond skater are all INSECTS. (1) Cicada (Hemiptera: Cicadidae) is a true bug famous for the loud songs of males. (2) Froghopper (Hemiptera: Cercopidae) is the insect whose nymphs produce the protective 'spit' (cuckoo-spit) on plants. (3) Pond skater (Hemiptera: Gerridae) is the aquatic insect that walks on the water surface thanks to hydrophobic legs and surface tension. All three are members of the order Hemiptera (true bugs). None are birds, fish or reptiles. Source: syllabus Biology Ch 4 (Animal Kingdom) and standard entomology references.

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