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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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Test your Everyday Science preparation

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301
Easy ppsc nts

Which blood component is primarily responsible for clotting?

  • A Red blood cells
  • B White blood cells
  • C Platelets
  • D Plasma
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Correct Answer: Option C — Platelets
Explanation: Platelets are small cell fragments in the blood that clump together at injury sites to form clots preventing excessive bleeding and initiating the wound healing process.
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302
Easy fpsc ppsc nts

Which part of the human eye controls the amount of light entering it?

  • A Retina
  • B Cornea
  • C Iris
  • D Lens
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Correct Answer: Option C — Iris
Explanation: The iris is the colored muscular structure that controls pupil size thereby regulating the amount of light entering the eye to ensure clear vision under varying light conditions.
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303
Easy ppsc nts

Which gas is most abundant in the Earth's atmosphere?

  • A Oxygen
  • B Nitrogen
  • C Carbon dioxide
  • D Argon
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Correct Answer: Option B — Nitrogen
Explanation: Nitrogen makes up about 78 percent of the Earth's atmosphere by volume making it the most abundant atmospheric gas far exceeding oxygen which constitutes roughly 21 percent.
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