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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

1,259 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
821
Everyday Science Medium

Which layer of the atmosphere contains the ozone layer that absorbs harmful ultraviolet radiation?

  • ATroposphere
  • BStratosphere
  • CMesosphere
  • DThermosphere
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Correct Answer: Option B — Stratosphere
Explanation: The stratosphere contains the ozone layer which absorbs most of the sun's harmful ultraviolet radiation protecting living organisms on Earth from excessive UV exposure.
Submitted by: PaperMCQs
822
Everyday Science Easy

Which gas is primarily responsible for the greenhouse effect contributing most to global warming?

  • AOxygen
  • BCarbon dioxide
  • CNitrogen
  • DHelium
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Correct Answer: Option B — Carbon dioxide
Explanation: Carbon dioxide is the primary greenhouse gas contributing to global warming as it traps heat in the atmosphere due to human activities like fossil fuel combustion and deforestation.
Submitted by: PaperMCQs
823
Everyday Science Easy

Which natural phenomenon results from the dispersion of sunlight through water droplets in the atmosphere?

  • AAurora
  • BRainbow
  • CMirage
  • DHalo
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Correct Answer: Option B — Rainbow
Explanation: A rainbow forms when sunlight is refracted reflected and dispersed through water droplets in the atmosphere splitting white light into its constituent spectral colors.
Submitted by: PaperMCQs
824
Everyday Science Medium

Which process explains why sweating helps cool the human body?

  • AConduction
  • BConvection
  • CEvaporation
  • DRadiation
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Correct Answer: Option C — Evaporation
Explanation: Sweating cools the body through evaporation as sweat absorbs heat from the skin and turns into vapor effectively removing thermal energy and lowering body temperature.
Submitted by: PaperMCQs
825
Everyday Science Medium

Which household appliance operates on the principle of electromagnetic induction to heat food?

  • AMicrowave oven
  • BInduction stove
  • CElectric kettle
  • DToaster
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Correct Answer: Option B — Induction stove
Explanation: Induction stoves use electromagnetic induction to generate heat directly within ferromagnetic cookware making them more energy efficient than traditional electric or gas stoves.
Submitted by: PaperMCQs
826
Everyday Science Easy

Which gas is commonly used to fill balloons so that they float in air?

  • AOxygen
  • BCarbon dioxide
  • CHelium
  • DNitrogen
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Correct Answer: Option C — Helium
Explanation: Helium is used to fill balloons because it is significantly lighter than air allowing balloons to float and rise due to its low density compared to atmospheric gases.
Submitted by: PaperMCQs
827
Everyday Science Medium

Which property of light explains why a straw appears bent when placed in a glass of water?

  • AReflection
  • BRefraction
  • CDiffraction
  • DDispersion
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Correct Answer: Option B — Refraction
Explanation: Refraction is the bending of light as it passes from one medium to another with different optical densities causing the straw to appear bent at the water's surface.
Submitted by: PaperMCQs
828
Everyday Science Medium

Which type of mirror is commonly used in vehicle side mirrors to provide a wider field of view?

  • AConcave mirror
  • BConvex mirror
  • CPlane mirror
  • DParabolic mirror
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Correct Answer: Option B — Convex mirror
Explanation: Convex mirrors are used in vehicle side mirrors because they diverge light rays producing a smaller but wider field of view helping drivers see more of their surroundings.
Submitted by: PaperMCQs
829
Everyday Science Medium

Which simple machine is used in a pair of scissors?

  • ALever
  • BPulley
  • CWheel and axle
  • DInclined plane
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Correct Answer: Option A — Lever
Explanation: Scissors function as a compound lever where two blades pivot around a fixed point allowing mechanical advantage to cut through materials with reduced applied force.
Submitted by: PaperMCQs
830
Everyday Science Easy

What is the normal body temperature of a healthy human in degrees Fahrenheit?

  • A95.6
  • B98.6
  • C101.6
  • D93.6
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Correct Answer: Option B — 98.6
Explanation: The average normal human body temperature is approximately 98.6 degrees Fahrenheit equivalent to 37 degrees Celsius though slight variations are normal among individuals throughout the day.
Submitted by: PaperMCQs
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