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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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101
Medium fpsc ppsc nts

Which phenomenon explains why a straw placed in a drink allows liquid to be sucked upward?

  • A Gravity pulling liquid
  • B Magnetic force
  • C Atmospheric pressure pushing liquid up
  • D Surface tension alone
Permalink
Correct Answer: Option C — Atmospheric pressure pushing liquid up
Explanation: When you suck on a straw you reduce air pressure inside it and the greater atmospheric pressure outside pushes the liquid upward into your mouth.
Submitted by: PaperMCQs
102
Easy fpsc ppsc nts

Which vitamin is produced when ultraviolet light acts on cholesterol in the skin?

  • A Vitamin A
  • B Vitamin E
  • C Vitamin K
  • D Vitamin D
Permalink
Correct Answer: Option D — Vitamin D
Explanation: Vitamin D is synthesised in the skin when UV-B radiation converts a form of cholesterol into Vitamin D3 which is then processed by the liver and kidneys.
Submitted by: PaperMCQs
103
Easy fpsc ppsc nts

Which everyday process is used when a doctor listens to heartbeats through a stethoscope?

  • A Refraction of sound
  • B Conduction of sound
  • C Amplification of light
  • D Reflection of light
Permalink
Correct Answer: Option B — Conduction of sound
Explanation: A stethoscope conducts sound from the chest through the tube to the earpieces amplifying the otherwise faint sounds of heartbeats and breathing.
Submitted by: PaperMCQs
104
Medium fpsc ppsc nts

Which gas is used to fill incandescent light bulb to prevent the filament from burning?

  • A Oxygen
  • B Carbon dioxide
  • C Argon or nitrogen
  • D Helium
Permalink
Correct Answer: Option C — Argon or nitrogen
Explanation: Incandescent bulbs are filled with argon or nitrogen to prevent the tungsten filament from oxidising and burning out quickly extending the bulb's lifespan.
Submitted by: PaperMCQs
105
Medium fpsc ppsc nts

Which phenomenon causes a needle to deflect when placed near a current-carrying wire?

  • A Magnetism
  • B Gravity
  • C Static electricity
  • D Sound waves
Permalink
Correct Answer: Option A — Magnetism
Explanation: A current-carrying wire produces a magnetic field around it which deflects a nearby compass needle demonstrating the link between electricity and magnetism.
Submitted by: PaperMCQs
106
Medium fpsc ppsc nts

Which everyday material is used as an X-ray absorber to protect the body during medical scans?

  • A Copper
  • B Lead
  • C Aluminium
  • D Steel
Permalink
Correct Answer: Option B — Lead
Explanation: Lead is used as a shield during X-ray procedures because it effectively absorbs harmful ionising radiation protecting body parts not being examined.
Submitted by: PaperMCQs
107
Easy ppsc nts

Which sense organ contains the olfactory receptors responsible for detecting smells?

  • A Ears
  • B Eyes
  • C Nose
  • D Tongue
Permalink
Correct Answer: Option C — Nose
Explanation: The nose contains olfactory receptors located in the nasal cavity that detect chemical molecules in the air and transmit smell information to the brain.
Submitted by: PaperMCQs
108
Easy fpsc ppsc nts

Which common substance has the chemical formula H2O2?

  • A Water
  • B Acetic acid
  • C Hydrogen peroxide
  • D Ammonia
Permalink
Correct Answer: Option C — Hydrogen peroxide
Explanation: Hydrogen peroxide H2O2 is a common antiseptic used to clean wounds and is also used as a bleaching agent and differs from water by having an extra oxygen atom.
Submitted by: PaperMCQs
109
Hard fpsc ppsc nts

Which layer of the skin provides insulation and stores energy as fat?

  • A Melanocyte layer
  • B Epidermis
  • C Dermis
  • D Hypodermis
Permalink
Correct Answer: Option A — Melanocyte layer
Explanation: The hypodermis also called subcutaneous tissue is the deepest skin layer that stores fat for insulation energy reserve and cushioning against physical impact.
Submitted by: PaperMCQs
110
Medium fpsc ppsc nts

Which everyday process converts mechanical energy into electrical energy in a bicycle dynamo?

  • A Radiation
  • B Conduction
  • C Electromagnetic induction
  • D Chemical reaction
Permalink
Correct Answer: Option C — Electromagnetic induction
Explanation: A bicycle dynamo converts mechanical energy from wheel rotation into electrical energy through electromagnetic induction as a coil rotates within a magnetic field.
Submitted by: PaperMCQs
111
Medium fpsc ppsc nts

Which organ produces the hormone adrenaline that prepares the body for fight or flight response?

  • A Thyroid gland
  • B Pituitary gland
  • C Pancreas
  • D Adrenal gland
Permalink
Correct Answer: Option D — Adrenal gland
Explanation: The adrenal glands located above the kidneys produce adrenaline which triggers the fight or flight response by increasing heart rate and blood flow to muscles.
Submitted by: PaperMCQs
112
Easy ppsc nts

Which planet is the largest in our solar system?

  • A Jupiter
  • B Mars
  • C Saturn
  • D Neptune
Permalink
Correct Answer: Option A — Jupiter
Explanation: Jupiter is the largest planet in the solar system with a mass greater than all other planets combined and is known for its Great Red Spot storm.
Submitted by: PaperMCQs
113
Medium fpsc ppsc nts

Which everyday safety device detects dangerous levels of carbon monoxide in homes?

  • A Smoke detector
  • B Carbon monoxide detector
  • C Thermostat
  • D Hygrometer
Permalink
Correct Answer: Option B — Carbon monoxide detector
Explanation: Carbon monoxide detectors are specialized safety devices that detect dangerous levels of this odorless gas in homes alerting occupants before harmful exposure occurs.
Submitted by: PaperMCQs
114
Medium fpsc ppsc nts

Which colorless and odorless gas is particularly dangerous because it can cause poisoning without detection unless monitored?

  • A Natural gas
  • B Carbon monoxide
  • C Helium
  • D Nitrogen
Permalink
Correct Answer: Option B — Carbon monoxide
Explanation: Carbon monoxide is a colorless and odorless gas produced by incomplete combustion making it particularly dangerous since it can cause poisoning without detection unless monitored by alarms.
Submitted by: PaperMCQs
115
Medium fpsc ppsc nts

Which common gas leak hazard in homes is often detected by its distinctive rotten egg smell added intentionally for safety?

  • A Natural gas leaks
  • B Carbon monoxide leaks
  • C Oxygen leaks
  • D Nitrogen leaks
Permalink
Correct Answer: Option A — Natural gas leaks
Explanation: Natural gas is odorless in its pure form so a chemical called mercaptan is intentionally added to give it a rotten egg smell allowing people to detect leaks for safety.
Submitted by: PaperMCQs
116
Easy fpsc ppsc nts

Which storage practice helps slow down the ripening and spoilage process of most fruits and vegetables?

  • A Storing at room temperature
  • B Refrigeration
  • C Storing in direct sunlight
  • D Storing in plastic without ventilation
Permalink
Correct Answer: Option B — Refrigeration
Explanation: Refrigeration slows down the ripening and spoilage process of most fruits and vegetables by reducing the rate of enzymatic and microbial activity that causes decay.
Submitted by: PaperMCQs
117
Easy fpsc ppsc nts

Which common food safety practice prevents cross contamination between raw meat and other foods?

  • A Using the same cutting board for everything
  • B Using separate cutting boards for raw meat
  • C Washing hands only after cooking
  • D Storing meat at room temperature
Permalink
Correct Answer: Option B — Using separate cutting boards for raw meat
Explanation: Using separate cutting boards for raw meat and other foods prevents cross contamination by avoiding the transfer of harmful bacteria from raw meat to ready to eat items.
Submitted by: PaperMCQs
118
Easy fpsc ppsc nts

Which everyday hygiene practice is most effective in preventing the spread of common cold and flu viruses?

  • A Washing hands frequently
  • B Eating spicy food
  • C Drinking cold water
  • D Wearing sunglasses
Permalink
Correct Answer: Option A — Washing hands frequently
Explanation: Washing hands frequently with soap and water removes viruses and bacteria from the skin significantly reducing the risk of spreading common cold and flu infections to others.
Submitted by: PaperMCQs
119
Easy fpsc ppsc nts

Which type of microorganism is responsible for causing common food spoilage through mold growth?

  • A Bacteria
  • B Fungi
  • C Virus
  • D Protozoa
Permalink
Correct Answer: Option B — Fungi
Explanation: Fungi including various molds are responsible for common food spoilage by breaking down organic material and producing visible fuzzy growth on items like bread and fruit.
Submitted by: PaperMCQs
120
Medium fpsc ppsc nts

Which microorganism is primarily responsible for fermenting sugars into alcohol in brewing and winemaking?

  • A Bacteria
  • B Yeast
  • C Algae
  • D Protozoa
Permalink
Correct Answer: Option B — Yeast
Explanation: Yeast ferments sugars into alcohol and carbon dioxide through anaerobic respiration making it essential for brewing beer producing wine and baking bread.
Submitted by: PaperMCQs
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