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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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161
Medium fpsc ppsc nts

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

  • A Thermometer
  • B Candle wick
  • C Barometer
  • D Magnet
Permalink
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.
Submitted by: PaperMCQs
162
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.
Submitted by: PaperMCQs
163
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.
Submitted by: PaperMCQs
164
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
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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.
Submitted by: PaperMCQs
165
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
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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.
Submitted by: PaperMCQs
166
Medium fpsc ppsc nts

Which law explains the equal and opposite reaction observed when a rocket launches?

  • A Newton's first law
  • B Newton's second law
  • C Newton's third law
  • D Law of conservation of energy
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Correct Answer: Option C — Newton's third law
Explanation: Newton's third law states that for every action there is an equal and opposite reaction explaining how a rocket is propelled forward by expelling gases backward at high speed.
Submitted by: PaperMCQs
167
Medium fpsc ppsc nts

Which law of motion explains why passengers lurch forward when a moving bus suddenly stops?

  • A Newton's first law
  • B Newton's second law
  • C Newton's third law
  • D Law of gravitation
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Correct Answer: Option A — Newton's first law
Explanation: Newton's first law of inertia explains that passengers continue moving forward when a bus suddenly stops because objects in motion tend to remain in motion unless acted upon by an external force.
Submitted by: PaperMCQs
168
Medium fpsc ppsc nts

Which element is the primary component of natural gas used for cooking and heating?

  • A Propane
  • B Methane
  • C Butane
  • D Ethane
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Correct Answer: Option B — Methane
Explanation: Methane is the primary component of natural gas commonly used for cooking and heating due to its high combustion efficiency and widespread availability through pipeline distribution.
Submitted by: PaperMCQs
169
Medium fpsc ppsc nts

Which vitamin deficiency commonly causes night blindness in humans?

  • A Vitamin A
  • B Vitamin B1
  • C Vitamin C
  • D Vitamin E
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Correct Answer: Option A — Vitamin A
Explanation: Vitamin A deficiency commonly causes night blindness because this vitamin is essential for producing rhodopsin a pigment in the retina necessary for vision in low light conditions.
Submitted by: PaperMCQs
170
Medium fpsc ppsc nts

Which vitamin deficiency commonly causes the disease scurvy?

  • A Vitamin A
  • B Vitamin B12
  • C Vitamin C
  • D Vitamin D
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Correct Answer: Option C — Vitamin C
Explanation: Scurvy is caused by a deficiency of Vitamin C which is essential for collagen synthesis and its absence leads to symptoms such as bleeding gums and joint pain.
Submitted by: PaperMCQs
171
Medium fpsc ppsc nts

Which gland in the human body is often referred to as the master gland because it controls other endocrine glands?

  • A Thyroid gland
  • B Pituitary gland
  • C Adrenal gland
  • D Pancreas
Permalink
Correct Answer: Option B — Pituitary gland
Explanation: The pituitary gland is referred to as the master gland because it secretes hormones that regulate the activity of other endocrine glands throughout the human body.
Submitted by: PaperMCQs
172
Medium fpsc ppsc nts

Which part of the human brain regulates vital involuntary functions such as breathing and heartbeat?

  • A Cerebrum
  • B Cerebellum
  • C Medulla oblongata
  • D Hypothalamus
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Correct Answer: Option C — Medulla oblongata
Explanation: The medulla oblongata located in the brainstem regulates vital involuntary functions including breathing heart rate and blood pressure essential for sustaining basic life processes.
Submitted by: PaperMCQs
173
Medium fpsc ppsc nts

Which part of the human brain is primarily responsible for controlling balance and coordination?

  • A Cerebrum
  • B Cerebellum
  • C Medulla oblongata
  • D Hypothalamus
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Correct Answer: Option B — Cerebellum
Explanation: The cerebellum located at the back of the brain is primarily responsible for controlling balance posture and fine motor coordination during voluntary muscle movements.
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174
Medium fpsc ppsc nts

Which blood type is known as the universal recipient for blood transfusions?

  • A O negative
  • B AB positive
  • C A negative
  • D B positive
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Correct Answer: Option B — AB positive
Explanation: AB positive blood is known as the universal recipient type because it contains both A and B antigens along with the Rh factor allowing it to accept blood from all other types.
Submitted by: PaperMCQs
175
Medium fpsc ppsc nts

Which blood type is known as the universal donor for blood transfusions?

  • A A positive
  • B AB positive
  • C O negative
  • D B negative
Permalink
Correct Answer: Option C — O negative
Explanation: O negative blood is known as the universal donor type because it lacks A B and Rh antigens making it compatible with recipients of nearly any blood type in emergency transfusions.
Submitted by: PaperMCQs
176
Medium fpsc ppsc nts

Which layer of the atmosphere contains the ozone layer that absorbs harmful ultraviolet radiation?

  • A Troposphere
  • B Stratosphere
  • C Mesosphere
  • D Thermosphere
Permalink
Correct Answer: Option B — Stratosphere
Explanation: The stratosphere contains the ozone layer which absorbs most of the sun's harmful ultraviolet radiation protecting living organisms on Earth from excessive UV exposure.
Submitted by: PaperMCQs
177
Medium fpsc ppsc nts

Which process explains why sweating helps cool the human body?

  • A Conduction
  • B Convection
  • C Evaporation
  • D Radiation
Permalink
Correct Answer: Option C — Evaporation
Explanation: Sweating cools the body through evaporation as sweat absorbs heat from the skin and turns into vapor effectively removing thermal energy and lowering body temperature.
Submitted by: PaperMCQs
178
Medium fpsc ppsc nts

Which household appliance operates on the principle of electromagnetic induction to heat food?

  • A Microwave oven
  • B Induction stove
  • C Electric kettle
  • D Toaster
Permalink
Correct Answer: Option B — Induction stove
Explanation: Induction stoves use electromagnetic induction to generate heat directly within ferromagnetic cookware making them more energy efficient than traditional electric or gas stoves.
Submitted by: PaperMCQs
179
Medium fpsc ppsc nts

Which property of light explains why a straw appears bent when placed in a glass of water?

  • A Reflection
  • B Refraction
  • C Diffraction
  • D Dispersion
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Correct Answer: Option B — Refraction
Explanation: Refraction is the bending of light as it passes from one medium to another with different optical densities causing the straw to appear bent at the water's surface.
Submitted by: PaperMCQs
180
Medium fpsc ppsc nts

Which type of mirror is commonly used in vehicle side mirrors to provide a wider field of view?

  • A Concave mirror
  • B Convex mirror
  • C Plane mirror
  • D Parabolic mirror
Permalink
Correct Answer: Option B — Convex mirror
Explanation: Convex mirrors are used in vehicle side mirrors because they diverge light rays producing a smaller but wider field of view helping drivers see more of their surroundings.
Submitted by: PaperMCQs
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