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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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491

Which renewable energy source harnesses heat stored inside the Earth to generate electricity?

  • ASolar
  • BWind
  • CTidal
  • DGeothermal
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Correct Answer: Option D — Geothermal
Explanation: Geothermal energy harnesses heat from within the Earth using steam or hot water from underground reservoirs to drive turbines and generate electricity with minimal environmental impact.
Submitted by: PaperMCQs
492

Which common process happens when iron is exposed to oxygen and moisture over time forming a reddish-brown coating?

  • ASublimation
  • BReduction
  • CNeutralisation
  • DOxidation forming iron oxide rust
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Correct Answer: Option D — Oxidation forming iron oxide rust
Explanation: Rusting is an oxidation process where iron reacts with oxygen and water to form iron oxide a reddish-brown substance that weakens and corrodes iron structures over time.
Submitted by: PaperMCQs
493

Which everyday observation shows that white light is composed of multiple colours?

  • AOil floating on water showing colour bands
  • BA prism separating white light into a spectrum
  • CSunlight reflected off water
  • DA glass of water looking clear
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Correct Answer: Option B — A prism separating white light into a spectrum
Explanation: Passing white light through a glass prism causes dispersion splitting it into a visible spectrum of colours from red to violet demonstrating that white light contains multiple wavelengths.
Submitted by: PaperMCQs
494

Which common kitchen appliance uses the principle of electromagnetic induction specifically to heat food through magnetic coupling?

  • AInduction cooker
  • BMicrowave oven
  • CConventional oven
  • DElectric kettle
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Correct Answer: Option A — Induction cooker
Explanation: An induction cooker uses electromagnetic induction to generate electric currents directly in ferromagnetic cookware producing heat through electrical resistance within the pot or pan itself.
Submitted by: PaperMCQs
495

Which everyday process causes wood to appear to shrink and blacken when burned but conserves matter overall?

  • APhysical change only
  • BSublimation
  • CCondensation
  • DConservation of matter through combustion
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Correct Answer: Option D — Conservation of matter through combustion
Explanation: When wood burns carbon dioxide water vapour and ash are produced conserving total matter according to the law of conservation of mass even though the solid wood appears to vanish.
Submitted by: PaperMCQs
496

Which type of teeth erupt last in humans typically between ages 17 and 25 and are commonly called wisdom teeth?

  • APremolars
  • BCanines
  • CMolars
  • DThird molars
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Correct Answer: Option D — Third molars
Explanation: Third molars commonly known as wisdom teeth are the last teeth to erupt typically between ages 17 and 25 and are often removed if they grow in misaligned.
Submitted by: PaperMCQs
497

Which everyday observation shows that pressure in a gas increases as temperature increases at constant volume?

  • AIce melting in the sun
  • BWood burning in fire
  • CTyre pressure increasing on a hot day
  • DWater boiling faster with a lid
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Correct Answer: Option C — Tyre pressure increasing on a hot day
Explanation: Tyre pressure increases on a hot day because as temperature rises the gas molecules inside move faster increasing the number and force of collisions with the tyre walls.
Submitted by: PaperMCQs
498

Which common household chemical is produced when electricity is passed through brine in a process called chlor-alkali?

  • ASodium hydroxide and chlorine gas
  • BVinegar
  • CBleach
  • DHydrogen peroxide
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Correct Answer: Option A — Sodium hydroxide and chlorine gas
Explanation: Electrolysis of brine sodium chloride solution produces sodium hydroxide chlorine gas and hydrogen gas through the chlor-alkali process used widely in chemical industry.
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499

Which common everyday substance is used to test for the presence of glucose in food and turns brick-red when heated?

  • AIodine solution
  • BBenedict's solution
  • CLitmus paper
  • DUniversal indicator
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Correct Answer: Option B — Benedict's solution
Explanation: Benedict's solution is used to test for reducing sugars including glucose and turns from blue to brick-red when heated in the presence of glucose.
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500

Which common everyday substance is used to test for the presence of starch in food by turning blue-black?

  • AIodine solution
  • BLitmus paper
  • CBenedict's solution
  • DBiuret reagent
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Correct Answer: Option A — Iodine solution
Explanation: Iodine solution turns blue-black in the presence of starch making it a simple and reliable test for detecting starch in food items during food science investigations.
Submitted by: PaperMCQs