Join WhatsApp ChannelDaily MCQs & Exam Updates

CSS MCQs

Civil Superior Services — Complete MCQ Bank

1,970 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
51
Chemistry Medium Uploaded: 04 Sep 2026

Which industrial process is used to manufacture ammonia?

  • ASolvay process
  • BOstwald process
  • CHaber process
  • DContact process
52
Chemistry Medium Uploaded: 04 Sep 2026

Which polymer is formed from the monomer ethylene?

  • APolypropylene
  • BPVC
  • CPolyethylene
  • DPolystyrene
53
Chemistry Easy Uploaded: 04 Sep 2026

Which functional group characterizes carboxylic acids?

  • A-CO-
  • B-COOH
  • C-OH
  • D-CHO
54
Chemistry Hard Uploaded: 04 Sep 2026

Which process is used to purify metals using electricity?

  • ARoasting
  • BCalcination
  • CElectrorefining
  • DSmelting
55
Chemistry Medium Uploaded: 04 Sep 2026

In a galvanic cell, electrons flow from:

  • ACathode to solution
  • BAnode to cathode
  • CSolution to anode
  • DCathode to anode
56
Chemistry Medium Uploaded: 04 Sep 2026

Le Chatelier's Principle predicts how equilibrium shifts in response to:

  • AMolecular weight change
  • BExternal stress
  • CCatalyst addition
  • DColor change
57
Chemistry Easy Uploaded: 04 Sep 2026

Which factor does not affect the rate of a chemical reaction?

  • ACatalyst presence
  • BTemperature
  • CConcentration
  • DColor of reactants
58
Chemistry Medium Uploaded: 04 Sep 2026

Which thermodynamic quantity measures the randomness of a system?

  • AEnthalpy
  • BEntropy
  • CInternal energy
  • DGibbs free energy
59
Chemistry Medium Uploaded: 04 Sep 2026

Which law states that heat energy is conserved in all processes?

  • AThird law of thermodynamics
  • BSecond law of thermodynamics
  • CFirst law of thermodynamics
  • DZeroth law of thermodynamics
60
Chemistry Medium Uploaded: 04 Sep 2026

What is a buffer solution?

  • AOnly basic
  • BResists change in pH
  • CAlways neutral
  • DOnly acidic