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PPSC Past Paper 2025: Everyday Science MCQs – Complete Solved MCQs

everyday Science - PPSC Past Paper 2025 MCQ’S

The study of atmospheric conditions, including climate and weather, is known as:

  • a) Hyetology
  • b) Hydrology
  • c) Meteorology
  • d) None of these
Correct Answer: c) Meteorology

Which common salt is frequently spread on roads to melt ice?

  • a) Potassium Chloride
  • b) Sodium Chloride
  • c) Calcium Chloride
  • d) None of these
Correct Answer: b) Sodium Chloride

How does the speed of electromagnetic waves in a vacuum compare to the speed of light?

  • a) Less speed
  • b) High speed
  • c) Same speed
  • d) None of these
Correct Answer: c) Same speed

When a ball is thrown straight up, what is its velocity at the very top of its trajectory?

  • a) 0
  • b) Max
  • c) Min
  • d) None of these
Correct Answer: a) 0

What kind of weather is typically associated with a decrease in atmospheric pressure?

  • a) Rain, wind
  • b) Pleasant conditions
  • c) Intense conditions (storms)
  • d) All of these
Correct Answer: c) Intense conditions (storms)

Who is known for the invention of the lightning rod?

  • a) Benjamin Franklin
  • b) Michael Faraday
  • c) James Watt
  • d) None of these
Correct Answer: a) Benjamin Franklin

A generator is a device that converts mechanical energy into what form of energy?

  • a) Heat energy
  • b) Potential energy
  • c) Electrical energy
  • d) None of these
Correct Answer: c) Electrical energy

Which enzyme, responsible for breaking down starch, is secreted by the salivary glands?

  • a) Ligases
  • b) Isomerases
  • c) Ptyalin (Salivary Amylase)
  • d) None of these
Correct Answer: c) Ptyalin (Salivary Amylase)

What is the name for a flammable gas mixture composed of hydrogen, methane, and carbon monoxide?

  • a) Natural gas
  • b) Methane gas
  • c) Coal gas
  • d) None of these
Correct Answer: c) Coal gas

Sulfuric acid (H₂SO₄) is a common example of what type of acid?

  • a) Hydrofluoric acid
  • b) Mineral acid
  • c) Salt
  • d) None of these
Correct Answer: b) Mineral acid

The removal of trees, which leads to the loss of protective ground cover, is a primary cause of:

  • a) Residual accumulation
  • b) Leaching
  • c) Soil erosion
  • d) None of these
Correct Answer: c) Soil erosion

What is the scientific reason for ice floating on liquid water?

  • a) Because ice is less dense than water.
  • b) Because ice is more dense than water.
  • c) Because ice is colder than water.
  • d) None of these
Correct Answer: a) Because ice is less dense than water.

How many individual vertebrae make up the human vertebral column?

  • a) 22
  • b) 33
  • c) 44
  • d) None of these
Correct Answer: b) 33

The primary function of taste buds on the tongue is to aid in the:

  • a) Safety of the mouth
  • b) Selection of food
  • c) Cleaning of the mouth
  • d) None of these
Correct Answer: b) Selection of food

What is the name of the galaxy closest to our Milky Way?

  • a) Comet Galaxy
  • b) Cartwheel Galaxy
  • c) Andromeda Galaxy
  • d) None of these
Correct Answer: c) Andromeda Galaxy

The ability of a submarine to control its buoyancy and depth is based on:

  • a) Principle of Pressure
  • b) Michael Faraday Principle
  • c) Archimedes’ principle
  • d) None of these
Correct Answer: c) Archimedes’ principle

The primary material used in the manufacture of computer microchips is:

  • a) Carbon
  • b) Silicon
  • c) Iron
  • d) None of these
Correct Answer: b) Silicon

The ancient geocentric model, which placed the Earth at the center of the universe with the Sun revolving around it, was first proposed by:

  • a) Ptolemy
  • b) Aristotle
  • c) Einstein
  • d) None of these
Correct Answer: a) Ptolemy

Estrogen is a sex hormone that is primarily associated with which gender?

  • a) Male
  • b) Female
  • c) Both
  • d) None of these
Correct Answer: b) Female

The scientific study of mental processes and behavior is known as:

  • a) Hetrology
  • b) Philosophy
  • c) Psychology
  • d) None of these
Correct Answer: c) Psychology

The development of the integrated circuit (microchip) is credited to:

  • a) Einstein
  • b) Coby Marshal
  • c) Jack Kilby
  • d) None of these
Correct Answer: c) Jack Kilby

Steel is primarily an alloy composed of:

  • a) Iron and Cobalt
  • b) Iron and Nickel
  • c) Iron and Carbon
  • d) None of these
Correct Answer: c) Iron and Carbon

A major health risk associated with increased exposure to ultraviolet (UV) radiation is:

  • a) Skin Infection
  • b) Digestion issues
  • c) Skin Cancer
  • d) None of these
Correct Answer: c) Skin Cancer

The term for any harmful alteration of our natural environment is:

  • a) Environmental Change
  • b) Violation
  • c) Pollution
  • d) None of these
Correct Answer: c) Pollution

In which state of matter are the particles held in fixed positions and unable to move freely?

  • a) Solid
  • b) Liquid
  • c) Gas
  • d) None of these
Correct Answer: a) Solid

What is the name for the hot, molten rock material found beneath the Earth’s surface?

  • a) Lava
  • b) Plutonic rock
  • c) Magma
  • d) None of these
Correct Answer: c) Magma

On a map, what feature indicates the ratio between a distance on the map and the corresponding distance on the ground?

  • a) Scope
  • b) Legends
  • c) Scale
  • d) None of these
Correct Answer: c) Scale

During hibernation, how does a frog primarily exchange respiratory gases?

  • a) Through its nose
  • b) Through its butt (cloaca)
  • c) Through its skin
  • d) None of these
Correct Answer: c) Through its skin

What is the largest internal organ (gland) in the human body?

  • a) Thyroid
  • b) Intestine
  • c) Liver
  • d) None of these
Correct Answer: c) Liver

The process of pasteurization involves heating which consumable liquid to destroy pathogens?

  • a) Food
  • b) Water
  • c) Milk
  • d) None of these
Correct Answer: c) Milk

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