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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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Subject Test

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281
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
Permalink
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
282
Medium fpsc ppsc nts

Which vitamin deficiency commonly causes the disease scurvy?

  • A Vitamin A
  • B Vitamin B12
  • C Vitamin C
  • D Vitamin D
Permalink
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
283
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
284
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
Permalink
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
285
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
Permalink
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.
Submitted by: PaperMCQs
286
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
Permalink
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.
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287
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.
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288
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
289
Easy fpsc ppsc nts

Which gas is primarily responsible for the greenhouse effect contributing most to global warming?

  • A Oxygen
  • B Carbon dioxide
  • C Nitrogen
  • D Helium
Permalink
Correct Answer: Option B — Carbon dioxide
Explanation: Carbon dioxide is the primary greenhouse gas contributing to global warming as it traps heat in the atmosphere due to human activities like fossil fuel combustion and deforestation.
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290
Easy fpsc ppsc nts

Which natural phenomenon results from the dispersion of sunlight through water droplets in the atmosphere?

  • A Aurora
  • B Rainbow
  • C Mirage
  • D Halo
Permalink
Correct Answer: Option B — Rainbow
Explanation: A rainbow forms when sunlight is refracted reflected and dispersed through water droplets in the atmosphere splitting white light into its constituent spectral colors.
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291
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.
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292
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.
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293
Easy ppsc nts

Which gas is commonly used to fill balloons so that they float in air?

  • A Oxygen
  • B Carbon dioxide
  • C Helium
  • D Nitrogen
Permalink
Correct Answer: Option C — Helium
Explanation: Helium is used to fill balloons because it is significantly lighter than air allowing balloons to float and rise due to its low density compared to atmospheric gases.
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294
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
Permalink
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.
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295
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.
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296
Medium fpsc ppsc nts

Which simple machine is used in a pair of scissors?

  • A Lever
  • B Pulley
  • C Wheel and axle
  • D Inclined plane
Permalink
Correct Answer: Option A — Lever
Explanation: Scissors function as a compound lever where two blades pivot around a fixed point allowing mechanical advantage to cut through materials with reduced applied force.
Submitted by: PaperMCQs
297
Easy ppsc nts

What is the normal body temperature of a healthy human in degrees Fahrenheit?

  • A 95.6
  • B 98.6
  • C 101.6
  • D 93.6
Permalink
Correct Answer: Option B — 98.6
Explanation: The average normal human body temperature is approximately 98.6 degrees Fahrenheit equivalent to 37 degrees Celsius though slight variations are normal among individuals throughout the day.
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298
Easy fpsc ppsc nts

Which gas do plants primarily absorb during photosynthesis?

  • A Oxygen
  • B Carbon dioxide
  • C Nitrogen
  • D Hydrogen
Permalink
Correct Answer: Option B — Carbon dioxide
Explanation: Plants absorb carbon dioxide from the atmosphere during photosynthesis using sunlight and water to convert it into glucose and oxygen which is released as a byproduct.
Submitted by: PaperMCQs
299
Easy fpsc ppsc nts

Which organ in the human body is primarily responsible for filtering blood and removing waste?

  • A Liver
  • B Kidney
  • C Spleen
  • D Pancreas
Permalink
Correct Answer: Option B — Kidney
Explanation: The kidneys filter blood to remove metabolic waste products and excess fluids excreting them as urine while also regulating electrolyte balance and blood pressure in the body.
Submitted by: PaperMCQs
300
Easy fpsc ppsc nts

Which vitamin is primarily synthesized in human skin upon sunlight exposure?

  • A Vitamin A
  • B Vitamin C
  • C Vitamin D
  • D Vitamin K
Permalink
Correct Answer: Option C — Vitamin D
Explanation: Vitamin D is synthesized in the skin when exposed to ultraviolet B rays from sunlight and is essential for calcium absorption and maintaining healthy bones and immune function.
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