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Everyday Science MCQs

387 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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Subject Test

Test your Everyday Science preparation

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341
Easy fpsc ppsc nts

Which natural disaster is measured using the Richter scale?

  • A Hurricanes
  • B Earthquakes
  • C Floods
  • D Tornadoes
Permalink
Correct Answer: Option B — Earthquakes
Explanation: The Richter scale is used to measure the magnitude of earthquakes based on the amplitude of seismic waves recorded by seismographs at monitoring stations.
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342
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
Permalink
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.
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343
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.
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344
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
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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.
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345
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
Permalink
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.
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346
Easy ppsc nts

Which gas makes up approximately 21 percent of Earth's atmosphere and is essential for respiration?

  • A Nitrogen
  • B Oxygen
  • C Carbon dioxide
  • D Argon
Permalink
Correct Answer: Option B — Oxygen
Explanation: Oxygen makes up approximately 21 percent of Earth's atmosphere and is essential for aerobic respiration in humans and animals allowing cells to generate energy from food.
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347
Medium fpsc ppsc nts

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

  • A Barometer
  • B Seismograph
  • C Anemometer
  • D Hygrometer
Permalink
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.
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348
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.
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349
Medium fpsc ppsc nts

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

  • A Barometer
  • B Hygrometer
  • C Anemometer
  • D Thermometer
Permalink
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.
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350
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.
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351
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
Permalink
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.
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352
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.
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353
Easy fpsc ppsc nts

Which common kitchen substance is used as a natural antacid due to its alkaline properties?

  • A Vinegar
  • B Baking soda
  • C Lemon juice
  • D Salt
Permalink
Correct Answer: Option B — Baking soda
Explanation: Baking soda sodium bicarbonate is commonly used as a natural antacid because its alkaline properties help neutralize excess stomach acid relieving symptoms of indigestion and heartburn.
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354
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.
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355
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
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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.
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356
Medium fpsc ppsc nts

Which everyday device uses the principle of capillary action to function?

  • A Thermometer
  • B Candle wick
  • C Barometer
  • D Magnet
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Correct Answer: Option B — Candle wick
Explanation: A candle wick uses capillary action to draw melted wax upward toward the flame allowing continuous burning as the liquid wax is pulled through the narrow fibers of the wick.
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357
Medium fpsc ppsc nts

Which gas law states that the volume of a gas is directly proportional to its temperature at constant pressure?

  • A Boyle's law
  • B Charles's law
  • C Gay-Lussac's law
  • D Avogadro's law
Permalink
Correct Answer: Option B — Charles's law
Explanation: Charles's law states that at constant pressure the volume of a gas is directly proportional to its absolute temperature meaning gas expands when heated and contracts when cooled.
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358
Medium fpsc ppsc nts

Which gas law states that pressure and volume of a gas are inversely proportional at constant temperature?

  • A Boyle's law
  • B Charles's law
  • C Gay-Lussac's law
  • D Avogadro's law
Permalink
Correct Answer: Option A — Boyle's law
Explanation: Boyle's law states that at constant temperature the pressure of a gas is inversely proportional to its volume meaning increased pressure results in decreased volume and vice versa.
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359
Medium fpsc ppsc nts

Which principle explains the lift generated by an aircraft wing due to differences in air pressure?

  • A Pascal's law
  • B Bernoulli's principle
  • C Archimedes' principle
  • D Boyle's law
Permalink
Correct Answer: Option B — Bernoulli's principle
Explanation: Bernoulli's principle explains that faster moving air over an aircraft wing creates lower pressure compared to slower air beneath generating the lift needed for flight.
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360
Medium fpsc ppsc nts

Which scientific principle explains why objects float or sink in a fluid?

  • A Archimedes' principle
  • B Pascal's law
  • C Bernoulli's principle
  • D Newton's law
Permalink
Correct Answer: Option A — Archimedes' principle
Explanation: Archimedes' principle states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of fluid displaced determining whether it floats or sinks.
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