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CSS MCQs

Civil Superior Services — Complete MCQ Bank

899 Questions
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How to prepare for CSS

CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.

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211
Everyday Science Medium

Which type of chemical bond involves the sharing of electrons between atoms?

  • AIonic bond
  • BMetallic bond
  • CCovalent bond
  • DHydrogen bond
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Correct Answer: Option C — Covalent bond
Explanation: A covalent bond forms when atoms share electrons between them to achieve stable electron configurations commonly seen in molecules like water and carbon dioxide.
Submitted by: PaperMCQs
212
Everyday Science Hard

Which planet in the solar system rotates on its side with an axial tilt of about 98 degrees?

  • AUranus
  • BNeptune
  • CSaturn
  • DJupiter
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Correct Answer: Option A — Uranus
Explanation: Uranus has an extreme axial tilt of about 98 degrees meaning it essentially rotates on its side likely caused by a massive collision during the early solar system.
Submitted by: PaperMCQs
213
Everyday Science Hard

Which everyday process explains how noise-cancelling headphones work?

  • AReflecting sound waves outward
  • BAbsorbing sound with foam only
  • CIncreasing inner air pressure
  • DGenerating sound waves that cancel incoming noise
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Correct Answer: Option D — Generating sound waves that cancel incoming noise
Explanation: Noise-cancelling headphones use microphones to detect ambient sound and generate opposing sound waves that cancel out the incoming noise through destructive interference.
Submitted by: PaperMCQs
214
Everyday Science Hard

Which type of radiation has the greatest penetrating power among alpha beta and gamma radiation?

  • AGamma
  • BAlpha
  • CBeta
  • DAll equal
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Correct Answer: Option A — Gamma
Explanation: Gamma radiation has the greatest penetrating power and can pass through dense materials like lead only being significantly blocked by thick lead or concrete shielding.
Submitted by: PaperMCQs
215
Everyday Science Hard

Which part of the nervous system is called the automatic system and controls involuntary body functions like digestion?

  • ASomatic nervous system
  • BCentral nervous system
  • CAutonomic nervous system
  • DPeripheral nervous system
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Correct Answer: Option C — Autonomic nervous system
Explanation: The autonomic nervous system regulates involuntary functions like digestion heartbeat and breathing without conscious effort and is divided into sympathetic and parasympathetic divisions.
Submitted by: PaperMCQs
216
Everyday Science Medium

Which scale measures the hardness of minerals, with diamond being the hardest at 10?

  • ARichter scale
  • BMohs scale
  • CBeaufort scale
  • DKelvin scale
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Correct Answer: Option B — Mohs scale
Explanation: The Mohs hardness scale ranks minerals from 1 to 10 based on their ability to scratch each other with diamond rated at 10 as the hardest naturally occurring mineral.
Submitted by: PaperMCQs
217
Everyday Science Medium

Which everyday item uses the principle of total internal reflection to transmit data as light signals?

  • APeriscope
  • BOptical fibre cable
  • CTelescope
  • DMicroscope
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Correct Answer: Option B — Optical fibre cable
Explanation: Optical fibre cables use total internal reflection to transmit data as pulses of light over long distances with minimal signal loss forming the backbone of modern internet.
Submitted by: PaperMCQs
218
English Medium

Choose the correct preposition to complete the sentence: "The master was annoyed _____ the servant."

  • AWith
  • BFor
  • COn
  • DAt
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Correct Answer: Option A — With
Explanation: The adjective "annoyed" is commonly followed by the preposition "with" when referring to a person who causes irritation. Therefore, the correct sentence is "The master was annoyed with the servant." This means that the master felt displeased or irritated because of the servant's behavior or actions.
Submitted by: Chandi
219
English Medium

Which of the following is the best antonym of "Heal"?

  • ARecover
  • BWound
  • CInjure
  • DRepair
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Correct Answer: Option C — Injure
Explanation: The word "Heal" means to restore health, cure an injury, or make someone or something healthy again. The opposite of heal is injure, which means to cause physical harm or damage. Although "wound" can also function as an opposite in some contexts, "injure" is the more direct and commonly accepted antonym in English vocabulary and competitive examinations.
Submitted by: Chandi
220
English Medium

Choose the correct preposition to complete the proverb: "Charity begins _____ home."

  • AAt
  • BWith
  • CIn
  • DFrom
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Correct Answer: Option A — At
Explanation: The correct English proverb is "Charity begins at home." It means that a person should first fulfill responsibilities toward their own family and close community before helping others. The preposition "at" is the standard and grammatically correct choice in this well-known expression, making the sentence both idiomatic and accurate
Submitted by: Chandi
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