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CSS MCQs

Civil Superior Services — Complete MCQ Bank

1,970 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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1121
Biology Medium Uploaded: 14 Jul 2026

Which type of immunity is present from birth and provides a non-specific first line of defence?

  • AAcquired immunity
  • BActive immunity
  • CPassive immunity
  • DInnate immunity
1122
Biology Hard Uploaded: 14 Jul 2026

What is the scientific study of fungi called?

  • ABacteriology
  • BVirology
  • CMycology
  • DBotany
1123
Biology Medium Uploaded: 14 Jul 2026

What is the process by which species change over time through natural selection?

  • AAdaptation
  • BEvolution
  • CMutation
  • DSpeciation
1124
Biology Medium Uploaded: 14 Jul 2026

What is the term for the variety of life on Earth including all species ecosystems and genetic variation?

  • AEvolution
  • BBiodiversity
  • CEcology
  • DTaxonomy
1125
Biology Medium Uploaded: 14 Jul 2026

What is the term for the genetic makeup of an organism?

  • APhenotype
  • BKaryotype
  • CGenotype
  • DGenome
1126
Biology Medium Uploaded: 14 Jul 2026

What is the term for the physical appearance or observable characteristics of an organism?

  • AGenome
  • BGenotype
  • CKaryotype
  • DPhenotype
1127
Chemistry Medium Uploaded: 14 Jul 2026

Which type of chemical bond involves atoms sharing electrons unequally due to difference in electronegativity?

  • ANon-polar covalent bond
  • BPolar covalent bond
  • CMetallic bond
  • DIonic bond
1128
Chemistry Medium Uploaded: 14 Jul 2026

Which type of formula shows all the bonds between atoms in a molecule?

  • AEmpirical formula
  • BStructural formula
  • CMolecular formula
  • DIonic formula
1129
Chemistry Medium Uploaded: 14 Jul 2026

Which indicator is colourless in acidic solution and pink in alkaline solution?

  • ALitmus
  • BMethyl orange
  • CUniversal indicator
  • DPhenolphthalein
1130
Chemistry Hard Uploaded: 14 Jul 2026

Which law states that the amount of substance deposited during electrolysis is directly proportional to the quantity of electricity passed?

  • ABoyle's Law
  • BGay-Lussac's Law
  • CAvogadro's Law
  • DFaraday's First Law of Electrolysis