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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

1,461 Questions
Exam Preparation Guide

How to prepare for FPSC

FPSC recruitment tests assess subject knowledge, general ability and job-related competence for federal government positions across Pakistan.

General KnowledgeCurrent AffairsEnglishJob-related Subjects
Read the official syllabus first, then combine subject-specific revision with timed mixed-question practice.
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481

Which layer at the back of the eye contains photoreceptor cells called rods and cones that detect light?

  • AIris
  • BRetina
  • CCornea
  • DLens
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Correct Answer: Option B — Retina
Explanation: The retina is the light-sensitive layer at the back of the eye containing rod cells for detecting light intensity and cone cells for detecting colour in bright conditions.
Submitted by: PaperMCQs
482

Which part of the human eye is responsible for forming a sharp image by focusing light onto the retina?

  • ACornea only
  • BIris
  • CRetina
  • DLens
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Correct Answer: Option D — Lens
Explanation: The lens of the eye focuses light onto the retina by changing its shape in a process called accommodation allowing the eye to focus on objects at varying distances.
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483

Which term describes the process by which a gas changes directly to a solid without passing through the liquid state?

  • ASublimation
  • BEvaporation
  • CCondensation
  • DDeposition
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Correct Answer: Option D — Deposition
Explanation: Deposition is the reverse of sublimation where a gas changes directly into a solid bypassing the liquid state as seen when water vapour freezes directly into frost.
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484

Which term describes the process of a solid changing directly to a gas without passing through the liquid state?

  • ASublimation
  • BEvaporation
  • CCondensation
  • DMelting
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Correct Answer: Option A — Sublimation
Explanation: Sublimation is the process where a solid changes directly to a gas without passing through the liquid state as seen with dry ice carbon dioxide transforming to vapour.
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485

Which type of diet is most commonly recommended for preventing cardiovascular disease due to its emphasis on healthy fats?

  • AHigh fat diet
  • BCarnivore diet
  • CHigh sugar diet
  • DMediterranean diet
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Correct Answer: Option D — Mediterranean diet
Explanation: The Mediterranean diet emphasising fruits vegetables whole grains legumes and healthy fats from olive oil and fish is widely recommended for reducing cardiovascular disease risk.
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486

Which common property of water describes water molecules being attracted to each other through hydrogen bonds?

  • AAdhesion
  • BSurface tension
  • CViscosity
  • DCohesion
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Correct Answer: Option D — Cohesion
Explanation: Cohesion describes the attraction of water molecules to each other through hydrogen bonds and is one reason water forms droplets and has relatively high surface tension.
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487

Which common property of water is described as the tendency of water molecules to stick to other surfaces?

  • ACohesion
  • BSurface tension
  • CAdhesion
  • DViscosity
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Correct Answer: Option C — Adhesion
Explanation: Adhesion is the property that describes water molecules sticking to other surfaces such as glass or plant cell walls and is responsible for capillary action in plants.
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488

Which everyday device measures body temperature by detecting the infrared radiation emitted from the ear canal or forehead?

  • ATraditional glass thermometer
  • BInfrared thermometer
  • CAlcohol thermometer
  • DBimetallic thermometer
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Correct Answer: Option B — Infrared thermometer
Explanation: Infrared thermometers detect infrared radiation emitted from the ear canal or forehead and convert it into a temperature reading without making direct contact with the skin.
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489

Which substance in a catalytic converter helps reduce harmful vehicle exhaust emissions?

  • AIron
  • BPlatinum and palladium
  • CCopper
  • DAluminium
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Correct Answer: Option B — Platinum and palladium
Explanation: Catalytic converters use platinum and palladium as catalysts to convert harmful exhaust gases like carbon monoxide nitrogen oxides and unburnt hydrocarbons into less harmful substances.
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490

Which term describes the minimum energy required to start a chemical reaction?

  • AKinetic energy
  • BPotential energy
  • CActivation energy
  • DChemical energy
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Correct Answer: Option C — Activation energy
Explanation: Activation energy is the minimum energy required to initiate a chemical reaction by breaking bonds in reactant molecules so that new bonds can form in the products.
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