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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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521

Which naturally occurring radioactive element was discovered by Marie Curie and named after her home country?

  • AUranium
  • BRadium
  • CPolonium
  • DThorium
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Correct Answer: Option C — Polonium
Explanation: Marie Curie discovered polonium in 1898 and named it after her home country Poland making it the first element to be named after a country.
Submitted by: PaperMCQs
522

Which everyday phenomenon demonstrates that objects at higher temperature emit more thermal radiation?

  • AIce floating in water
  • BA rainbow forming after rain
  • CSound echoing in a room
  • DA red hot iron glowing
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Correct Answer: Option D — A red hot iron glowing
Explanation: A red hot iron glowing demonstrates that objects emit electromagnetic radiation including visible light when heated to sufficient temperatures and emit more radiation at higher temperatures.
Submitted by: PaperMCQs
523

Which type of chemical bond involves the transfer of electrons from one atom to another?

  • ACovalent bond
  • BIonic bond
  • CMetallic bond
  • DHydrogen bond
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Correct Answer: Option B — Ionic bond
Explanation: An ionic bond forms when electrons are transferred from one atom to another creating oppositely charged ions that attract each other as seen in table salt sodium chloride.
Submitted by: PaperMCQs
524

Which type of chemical bond involves the sharing of electrons between atoms?

  • AIonic bond
  • BMetallic bond
  • CCovalent bond
  • DHydrogen bond
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Correct Answer: Option C — Covalent bond
Explanation: A covalent bond forms when atoms share electrons between them to achieve stable electron configurations commonly seen in molecules like water and carbon dioxide.
Submitted by: PaperMCQs
525

Which part of the human body regulates temperature through sweating and blood vessel dilation?

  • ALiver
  • BLungs
  • CSkin
  • DKidney
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Correct Answer: Option C — Skin
Explanation: The skin regulates body temperature through sweating to cool down and constricting or dilating blood vessels to retain or release heat maintaining thermal homeostasis.
Submitted by: PaperMCQs
526

Which household disinfectant chemical is commonly used to purify drinking water in small quantities?

  • AChlorine
  • BSulfuric acid
  • CHydrochloric acid
  • DAmmonia
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Correct Answer: Option A — Chlorine
Explanation: Chlorine is commonly added in small safe quantities to drinking water supplies to kill bacteria viruses and other pathogens making the water safe for human consumption.
Submitted by: PaperMCQs
527

Which phenomenon is responsible for the formation of a shadow?

  • ARefraction
  • BRectilinear propagation of light
  • CAbsorption
  • DDispersion
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Correct Answer: Option B — Rectilinear propagation of light
Explanation: Shadows form because light travels in straight lines and when an opaque object blocks the light path a region of darkness called a shadow forms behind the object.
Submitted by: PaperMCQs
528

What is the approximate speed of light in a vacuum?

  • A300 km per second
  • B3000 km per second
  • C300000 km per second
  • D3000000 km per second
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Correct Answer: Option C — 300000 km per second
Explanation: Light travels at approximately 300000 kilometres per second in a vacuum making it the fastest known phenomenon in the universe and a fundamental constant in physics.
Submitted by: PaperMCQs
529

Which everyday device changes alternating current from power lines to the lower voltages suitable for homes?

  • ATransformer
  • BGenerator
  • CBattery
  • DInverter
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Correct Answer: Option A — Transformer
Explanation: Transformers step down the high voltage alternating current from power transmission lines to the lower voltages suitable for safe use in residential and commercial buildings.
Submitted by: PaperMCQs
530

Which unit measures the loudness or intensity of sound?

  • AHertz
  • BDecibel
  • CJoule
  • DNewton
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Correct Answer: Option B — Decibel
Explanation: Decibel is the unit used to measure sound intensity or loudness with normal conversation at about 60 dB and sounds above 85 dB potentially damaging hearing over time.
Submitted by: PaperMCQs