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Everyday Science MCQs

303 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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241
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
Permalink
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
242
Easy fpsc ppsc nts

Which macronutrient is essential for building and repairing body tissues such as muscles?

  • A Carbohydrates
  • B Fats
  • C Proteins
  • D Fiber
Permalink
Correct Answer: Option C — Proteins
Explanation: Proteins are essential macronutrients required for building and repairing body tissues including muscles skin and organs as they provide the amino acids needed for cellular growth.
Submitted by: PaperMCQs
243
Easy fpsc ppsc nts

Which macronutrient is the body's primary and most efficient source of quick energy?

  • A Proteins
  • B Fats
  • C Carbohydrates
  • D Vitamins
Permalink
Correct Answer: Option C — Carbohydrates
Explanation: Carbohydrates serve as the body's primary and most efficient source of quick energy as they are readily broken down into glucose which cells use for immediate fuel.
Submitted by: PaperMCQs
244
Easy fpsc ppsc nts

Which common food item is a good source of dietary fiber important for digestive health?

  • A White bread
  • B Whole grains
  • C Refined sugar
  • D Processed cheese
Permalink
Correct Answer: Option B — Whole grains
Explanation: Whole grains are an excellent source of dietary fiber which supports healthy digestion regulates blood sugar levels and helps maintain overall gastrointestinal health.
Submitted by: PaperMCQs
245
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
Permalink
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
246
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
Permalink
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
247
Easy fpsc ppsc nts

Which renewable energy source generates electricity by harnessing the flow of water through dams or rivers?

  • A Solar energy
  • B Wind energy
  • C Hydropower
  • D Geothermal energy
Permalink
Correct Answer: Option C — Hydropower
Explanation: Hydropower generates electricity by harnessing the kinetic energy of flowing water typically through dams or river turbines making it one of the oldest renewable energy sources used worldwide.
Submitted by: PaperMCQs
248
Easy fpsc ppsc nts

Which renewable energy source uses moving air currents to generate electricity through turbines?

  • A Solar energy
  • B Wind energy
  • C Hydropower
  • D Biomass energy
Permalink
Correct Answer: Option B — Wind energy
Explanation: Wind energy uses moving air currents to rotate large turbine blades which drive generators to produce electricity offering a clean and increasingly cost effective renewable power source.
Submitted by: PaperMCQs
249
Easy fpsc ppsc nts

Which renewable energy source harnesses sunlight directly to generate electricity?

  • A Wind energy
  • B Solar energy
  • C Hydropower
  • D Geothermal energy
Permalink
Correct Answer: Option B — Solar energy
Explanation: Solar energy harnesses sunlight directly using photovoltaic cells to generate electricity providing a clean and renewable alternative to fossil fuel based power generation.
Submitted by: PaperMCQs
250
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
Permalink
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
251
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
Permalink
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
252
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
Permalink
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
253
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
254
Easy fpsc ppsc nts

Which everyday chemical reaction is responsible for rusting of iron objects?

  • A Oxidation
  • B Reduction
  • C Neutralization
  • D Sublimation
Permalink
Correct Answer: Option A — Oxidation
Explanation: Rusting is an oxidation reaction where iron reacts with oxygen and moisture in the air forming iron oxide which weakens and corrodes metal structures over time.
Submitted by: PaperMCQs
255
Hard fpsc ppsc nts

Which scale is used to estimate wind speed based on observed sea or land conditions without instruments?

  • A Richter scale
  • B Beaufort scale
  • C Fujita scale
  • D Saffir-Simpson scale
Permalink
Correct Answer: Option B — Beaufort scale
Explanation: The Beaufort scale estimates wind speed by observing its effects on sea waves and land conditions providing a practical method for assessing wind force without specialized instruments.
Submitted by: PaperMCQs
256
Hard fpsc ppsc nts

Which scale is commonly used to measure the intensity of hurricanes and tropical cyclones?

  • A Richter scale
  • B Saffir-Simpson scale
  • C Beaufort scale
  • D Fujita scale
Permalink
Correct Answer: Option B — Saffir-Simpson scale
Explanation: The Saffir-Simpson scale categorizes hurricanes into five categories based on sustained wind speed helping predict potential damage and guide disaster preparedness measures.
Submitted by: PaperMCQs
257
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.
Submitted by: PaperMCQs
258
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.
Submitted by: PaperMCQs
259
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
260
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
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