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CSS MCQs

Civil Superior Services — Complete MCQ Bank

1,939 Questions
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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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1091
Biology Hard Uploaded: 14 Jul 2026

What is the scientific study of fungi called?

  • ABacteriology
  • BVirology
  • CMycology
  • DBotany
1092
Biology Medium Uploaded: 14 Jul 2026

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

  • AAdaptation
  • BEvolution
  • CMutation
  • DSpeciation
1093
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
1094
Biology Medium Uploaded: 14 Jul 2026

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

  • APhenotype
  • BKaryotype
  • CGenotype
  • DGenome
1095
Biology Medium Uploaded: 14 Jul 2026

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

  • AGenome
  • BGenotype
  • CKaryotype
  • DPhenotype
1096
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
1097
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
1098
Chemistry Medium Uploaded: 14 Jul 2026

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

  • ALitmus
  • BMethyl orange
  • CUniversal indicator
  • DPhenolphthalein
1099
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
1100
Chemistry Hard Uploaded: 14 Jul 2026

What is the chemical formula for chloroform a once common anaesthetic?

  • ACH2Cl2
  • BCCl4
  • CCHCl2
  • DCHCl3