Join WhatsApp ChannelDaily MCQs & Exam Updates

CSS MCQs

Civil Superior Services — Complete MCQ Bank

1,939 Questions
Exam Preparation Guide

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.

Pakistan AffairsCurrent AffairsEnglishEveryday Science
Combine daily MCQ practice with analytical reading, vocabulary building and regular revision of national and international affairs.
CSS preparation illustration
11
Chemistry Medium Uploaded: 04 Sep 2026

What is the term for a substance that speeds up rusting of iron?

  • APaint
  • BOil
  • CElectrolyte (like salt water)
  • DDry air
12
Chemistry Hard Uploaded: 04 Sep 2026

What is the equivalence point in a titration?

  • APoint where indicator changes color permanently
  • BPoint where moles of acid equal moles of base
  • CPoint of maximum temperature
  • DStarting point of titration
13
Chemistry Easy Uploaded: 04 Sep 2026

What is the term for a positively charged ion?

  • ACation
  • BIsotope
  • CAnion
  • DIsomer
14
Chemistry Hard Uploaded: 04 Sep 2026

What is the term for two or more different atomic nuclei with the same mass number but different atomic numbers?

  • AIsotones
  • BIsomers
  • CIsotopes
  • DIsobars
15
Chemistry Medium Uploaded: 04 Sep 2026

What is the term for the energy required to remove an electron from a gaseous atom?

  • AElectronegativity
  • BIonization energy
  • CLattice energy
  • DElectron affinity
16
Chemistry Hard Uploaded: 04 Sep 2026

Which type of mixture has particles that scatter light, known as the Tyndall effect?

  • AColloid
  • BTrue solution
  • CPure compound
  • DSuspension only
17
Chemistry Medium Uploaded: 04 Sep 2026

What happens to the solubility of most solid solutes as temperature increases?

  • ADecreases
  • BRemains constant
  • CIncreases
  • DBecomes zero
18
Chemistry Medium Uploaded: 04 Sep 2026

What is the trend in ionization energy down a group?

  • ARemains constant
  • BFluctuates randomly
  • CIncreases
  • DDecreases
19
Chemistry Easy Uploaded: 04 Sep 2026

Enzymes are biological catalysts primarily made of:

  • ALipids
  • BNucleic acids
  • CCarbohydrates
  • DProteins
20
Chemistry Medium Uploaded: 04 Sep 2026

Which industrial process is used to manufacture ammonia?

  • ASolvay process
  • BOstwald process
  • CHaber process
  • DContact process