Join WhatsApp ChannelDaily MCQs & Exam Updates

CSS MCQs

Civil Superior Services — Complete MCQ Bank

106 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
41
Chemistry Hard Uploaded: 07 Aug 2026

Which scientist proposed the modern periodic law?

  • AAntoine Lavoisier
  • BJohn Dalton
  • CDmitri Mendeleev
  • DHenry Moseley
42
Chemistry Medium Uploaded: 07 Aug 2026

What is the formula for calculating molarity?

  • AMoles/Volume in litres
  • BMass/Volume
  • CMoles/Mass
  • DVolume/Moles
43
Chemistry Medium Uploaded: 07 Aug 2026

What is the term for the minimum energy needed to start a chemical reaction?

  • AIonization energy
  • BLattice energy
  • CBond energy
  • DActivation energy
44
Chemistry Hard Uploaded: 07 Aug 2026

What is the empirical formula of benzene?

  • AC2H2
  • BC3H3
  • CC6H6
  • DCH
45
Chemistry Medium Uploaded: 07 Aug 2026

What type of reaction is photosynthesis classified as?

  • ACombustion
  • BExothermic
  • CEndothermic
  • DRedox only
46
Chemistry Medium Uploaded: 07 Aug 2026

What is the strongest type of intermolecular force?

  • AVan der Waals forces
  • BDipole-dipole forces
  • CHydrogen bonding
  • DLondon dispersion forces
47
Chemistry Medium Uploaded: 07 Aug 2026

Which element has the highest electronegativity?

  • AOxygen
  • BChlorine
  • CFluorine
  • DNitrogen
48
Chemistry Hard Uploaded: 07 Aug 2026

Which of the following describes Le Chatelier's Principle?

  • AReactions always favor products
  • BSystems at equilibrium resist changes to conditions
  • CCatalysts change equilibrium position
  • DReactions cannot reach equilibrium
49
Chemistry Hard Uploaded: 07 Aug 2026

What is the term used for the study of heat changes in chemical reactions?

  • AElectrochemistry
  • BThermochemistry
  • CPhotochemistry
  • DStoichiometry
50
Chemistry Medium Uploaded: 07 Aug 2026

What is the process of adding electrons in a redox reaction called?

  • AOxidation
  • BReduction
  • CIonization
  • DNeutralization