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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

1,262 Questions
Exam Preparation Guide

How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
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All Subjects Biology Chemistry Computer Science Current Affairs English Everyday Science General Knowledge Islamic Studies Mathematics Pakistan Studies Physics
551
Everyday Science Easy

Which process in the water cycle involves the sun's energy turning liquid water into water vapour?

  • ACondensation
  • BPrecipitation
  • CEvaporation
  • DInfiltration
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Correct Answer: Option C — Evaporation
Explanation: Evaporation is the process in the water cycle where solar energy heats water in oceans lakes and rivers turning liquid water into water vapour that rises into the atmosphere.
Submitted by: PaperMCQs
552
Everyday Science Easy

Which device is used in submarines to see objects above the water surface without surfacing?

  • APeriscope
  • BSonar
  • CRadar
  • DTelescope
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Correct Answer: Option A — Periscope
Explanation: A periscope uses mirrors or prisms arranged at angles to reflect light allowing a submerged submarine or a person in a trench to see objects above without being visible.
Submitted by: PaperMCQs
553
Everyday Science Medium

Which everyday phenomenon explains why a ship made of steel can float despite steel being denser than water?

  • AThe ship displaces a volume of water equal to its weight
  • BSteel is lighter than water
  • CSteel reacts with seawater to reduce density
  • DShips contain compressed air making them float
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Correct Answer: Option A — The ship displaces a volume of water equal to its weight
Explanation: A steel ship floats because its hollow shape displaces a large volume of water whose weight equals the ship's weight satisfying Archimedes' principle even though steel itself sinks.
Submitted by: PaperMCQs
554
Everyday Science Medium

Which type of wave requires a material medium to travel and cannot propagate through vacuum?

  • AElectromagnetic wave
  • BLight wave
  • CSound wave
  • DRadio wave
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Correct Answer: Option C — Sound wave
Explanation: Sound is a mechanical wave that requires a material medium such as air water or solid to propagate and cannot travel through a vacuum unlike electromagnetic waves.
Submitted by: PaperMCQs
555
Everyday Science Hard

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
556
Everyday Science Medium

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
557
Everyday Science Medium

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
558
Everyday Science Medium

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
559
Everyday Science Medium

Which everyday phenomenon explains how a guitar produces different musical notes when different strings are plucked?

  • AAll strings vibrate at the same frequency
  • BLonger strings produce higher pitch
  • CStrings of different mass and tension vibrate at different frequencies
  • DThicker strings always produce higher notes
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Correct Answer: Option C — Strings of different mass and tension vibrate at different frequencies
Explanation: Guitar strings of different thickness and tension vibrate at different natural frequencies when plucked producing different musical pitches from deep bass to high treble notes.
Submitted by: PaperMCQs
560
Everyday Science Medium

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
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