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Everyday Science MCQs

181 Questions Subject Test
Subject Preparation Guide

Prepare Everyday Science with confidence

Understand the science behind daily life through questions covering health, energy, environment, inventions and natural phenomena.

Human BodyEnergyEnvironmentScientific Inventions
Important for general science portions of CSS, PMS, FPSC and provincial tests.
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141
Medium fpsc ppsc nts

Which common everyday substance is classified as a strong acid frequently used in car batteries?

  • A Acetic acid
  • B Sulfuric acid
  • C Citric acid
  • D Carbonic acid
Permalink
Correct Answer: Option B — Sulfuric acid
Explanation: Sulfuric acid is a strong acid commonly used as the electrolyte in lead acid car batteries enabling the chemical reactions necessary for storing and releasing electrical energy.
Submitted by: PaperMCQs
142
Medium fpsc ppsc nts

Which type of fat is generally considered healthier and is commonly found in foods like olive oil and nuts?

  • A Saturated fat
  • B Trans fat
  • C Unsaturated fat
  • D Hydrogenated fat
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Correct Answer: Option C — Unsaturated fat
Explanation: Unsaturated fats commonly found in olive oil nuts and avocados are generally considered healthier than saturated or trans fats as they support heart health when consumed in moderation.
Submitted by: PaperMCQs
143
Medium fpsc ppsc nts

Which everyday observation demonstrates the concept of inertia in physics?

  • A A ball rolling downhill
  • B A seated passenger jerking forward during sudden braking
  • C Water boiling at high altitude
  • D A magnet attracting iron filings
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Correct Answer: Option B — A seated passenger jerking forward during sudden braking
Explanation: A seated passenger jerking forward during sudden braking demonstrates inertia as the body continues moving forward due to its tendency to resist changes in its state of motion.
Submitted by: PaperMCQs
144
Medium fpsc ppsc nts

Which natural process explains how mountains gradually wear down over long periods of time?

  • A Erosion
  • B Deposition
  • C Sedimentation
  • D Weathering and erosion
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Correct Answer: Option D — Weathering and erosion
Explanation: Weathering and erosion together explain how mountains gradually wear down over long periods through physical chemical and biological processes that break down and transport rock material.
Submitted by: PaperMCQs
145
Medium fpsc ppsc nts

Which gas commonly used in refrigerators and air conditioners was historically linked to ozone layer depletion?

  • A Carbon dioxide
  • B Chlorofluorocarbons
  • C Methane
  • D Nitrogen
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Correct Answer: Option B — Chlorofluorocarbons
Explanation: Chlorofluorocarbons CFCs once widely used as refrigerants were linked to ozone layer depletion as they release chlorine atoms that break down ozone molecules in the stratosphere.
Submitted by: PaperMCQs
146
Medium fpsc ppsc nts

Which everyday phenomenon demonstrates the principle of capillary action in plants?

  • A Photosynthesis
  • B Transpiration
  • C Water rising through plant stems
  • D Respiration
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Correct Answer: Option C — Water rising through plant stems
Explanation: Capillary action allows water to rise through narrow xylem vessels in plant stems against gravity helping transport water and nutrients from roots to leaves throughout the plant.
Submitted by: PaperMCQs
147
Medium fpsc ppsc nts

Which property of water allows insects like water striders to walk on its surface?

  • A Viscosity
  • B Surface tension
  • C Density
  • D Capillarity
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Correct Answer: Option B — Surface tension
Explanation: Surface tension is the cohesive force between water molecules at the surface that creates a thin elastic like layer allowing lightweight insects such as water striders to walk on water.
Submitted by: PaperMCQs
148
Medium fpsc ppsc nts

Which gas is responsible for the characteristic smell often associated with rain after a dry spell?

  • A Methane
  • B Ozone
  • C Petrichor compounds
  • D Sulfur dioxide
Permalink
Correct Answer: Option C — Petrichor compounds
Explanation: The distinctive earthy smell after rain known as petrichor is caused by plant oils geosmin released by soil bacteria and ozone combining in the air during rainfall.
Submitted by: PaperMCQs
149
Medium fpsc ppsc nts

Which water purification process removes dissolved salts and impurities by forcing water through a semi-permeable membrane?

  • A Chlorination
  • B Reverse osmosis
  • C Boiling
  • D UV purification
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Correct Answer: Option B — Reverse osmosis
Explanation: Reverse osmosis forces water through a semi-permeable membrane under pressure removing dissolved salts and impurities producing cleaner and safer drinking water.
Submitted by: PaperMCQs
150
Medium fpsc ppsc nts

Which household water purification method uses ultraviolet light to kill bacteria and viruses?

  • A Reverse osmosis
  • B UV purification
  • C Boiling
  • D Chlorination
Permalink
Correct Answer: Option B — UV purification
Explanation: UV purification systems use ultraviolet light to destroy the DNA of bacteria viruses and other pathogens in water making it safe for drinking without altering its taste.
Submitted by: PaperMCQs
151
Medium fpsc ppsc nts

Which preservation technique uses controlled heating to kill harmful microorganisms in liquids like milk?

  • A Dehydration
  • B Pasteurization
  • C Fermentation
  • D Canning
Permalink
Correct Answer: Option B — Pasteurization
Explanation: Pasteurization involves heating liquids like milk to a specific temperature for a set time to kill harmful microorganisms while preserving nutritional quality and extending shelf life.
Submitted by: PaperMCQs
152
Medium fpsc ppsc nts

Which common food preservation method works by removing moisture to inhibit bacterial growth?

  • A Refrigeration
  • B Dehydration
  • C Pasteurization
  • D Freezing
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Correct Answer: Option B — Dehydration
Explanation: Dehydration preserves food by removing moisture content which inhibits the growth of bacteria fungi and other microorganisms that require water to survive and multiply.
Submitted by: PaperMCQs
153
Medium fpsc ppsc nts

Which instrument is used to detect and measure the magnitude of earthquakes?

  • A Barometer
  • B Seismograph
  • C Anemometer
  • D Hygrometer
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Correct Answer: Option B — Seismograph
Explanation: A seismograph detects and records ground vibrations allowing scientists to measure the magnitude and epicenter of earthquakes for disaster monitoring and early warning systems.
Submitted by: PaperMCQs
154
Medium fpsc ppsc nts

Which instrument is used to measure wind speed?

  • A Barometer
  • B Hygrometer
  • C Anemometer
  • D Seismograph
Permalink
Correct Answer: Option C — Anemometer
Explanation: An anemometer measures wind speed and is commonly used at weather stations and airports to monitor atmospheric conditions important for aviation and meteorological forecasting.
Submitted by: PaperMCQs
155
Medium fpsc ppsc nts

Which instrument is used to measure humidity levels in the atmosphere?

  • A Barometer
  • B Hygrometer
  • C Anemometer
  • D Thermometer
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Correct Answer: Option B — Hygrometer
Explanation: A hygrometer is the instrument used to measure humidity levels in the atmosphere providing important data for weather forecasting agriculture and indoor climate control.
Submitted by: PaperMCQs
156
Medium fpsc ppsc nts

Which device measures atmospheric pressure and is commonly used for weather forecasting?

  • A Thermometer
  • B Barometer
  • C Hygrometer
  • D Anemometer
Permalink
Correct Answer: Option B — Barometer
Explanation: A barometer measures atmospheric pressure and is widely used in weather forecasting since pressure changes often indicate approaching weather systems such as storms or clear skies.
Submitted by: PaperMCQs
157
Medium fpsc ppsc nts

Which type of wave does light represent in terms of its propagation?

  • A Longitudinal wave
  • B Transverse wave
  • C Mechanical wave
  • D Standing wave
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Correct Answer: Option B — Transverse wave
Explanation: Light is a transverse electromagnetic wave in which oscillations occur perpendicular to the direction of wave travel distinguishing it from longitudinal sound waves.
Submitted by: PaperMCQs
158
Medium fpsc ppsc nts

Which everyday process best illustrates the conversion of chemical energy into mechanical energy?

  • A Burning fuel in a car engine
  • B Boiling water
  • C Solar panel charging a phone
  • D Photosynthesis
Permalink
Correct Answer: Option A — Burning fuel in a car engine
Explanation: Burning fuel in a car engine illustrates the conversion of chemical energy stored in fuel into mechanical energy that powers the vehicle's movement through controlled combustion.
Submitted by: PaperMCQs
159
Medium fpsc ppsc nts

Which type of lens is used to correct hyperopia or farsightedness?

  • A Concave lens
  • B Convex lens
  • C Bifocal lens
  • D Cylindrical lens
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Correct Answer: Option B — Convex lens
Explanation: Convex lenses are used to correct hyperopia or farsightedness because they converge light rays helping the eye focus images properly onto the retina for clearer near vision.
Submitted by: PaperMCQs
160
Medium fpsc ppsc nts

Which type of lens is used to correct myopia or nearsightedness?

  • A Convex lens
  • B Concave lens
  • C Bifocal lens
  • D Cylindrical lens
Permalink
Correct Answer: Option B — Concave lens
Explanation: Concave lenses are used to correct myopia or nearsightedness because they diverge light rays before they enter the eye allowing the image to focus properly on the retina.
Submitted by: PaperMCQs
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