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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

1,997 Questions
Exam Preparation Guide

How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
PPSC preparation illustration
1011
Chemistry Hard Uploaded: 14 Jul 2026

Which type of isomerism involves compounds with the same molecular formula but different structural arrangements?

  • AStructural isomerism
  • BOptical isomerism
  • CGeometric isomerism
  • DDynamic isomerism
1012
Chemistry Medium Uploaded: 14 Jul 2026

What does Avogadro's number represent?

  • ANumber of atoms in 1 gram of hydrogen
  • BNumber of particles in one mole of a substance
  • CNumber of molecules in 1 litre of gas
  • DNumber of protons in a nucleus
1013
Chemistry Easy Uploaded: 14 Jul 2026

What is the chemical formula for hydrogen peroxide commonly used as an antiseptic?

  • AH2O2
  • BH2O
  • CH3O2
  • DHO2
1014
Chemistry Medium Uploaded: 14 Jul 2026

Which reaction type involves the breaking of a large molecule into smaller ones?

  • ASynthesis
  • BDisplacement
  • CDecomposition
  • DNeutralisation
1015
Chemistry Medium Uploaded: 14 Jul 2026

What is the general formula of alkanes where n is the number of carbon atoms?

  • ACnH2n
  • BCnH2n+2
  • CCnHn
  • DCnH2n-2
1016
Chemistry Medium Uploaded: 14 Jul 2026

Which type of hydrocarbon contains at least one carbon to carbon double bond?

  • AAlkane
  • BAlkyne
  • CAlkene
  • DArene
1017
Chemistry Easy Uploaded: 14 Jul 2026

What is the IUPAC name for the simplest hydrocarbon with formula CH4?

  • AEthane
  • BButane
  • CPropane
  • DMethane
1018
Chemistry Medium Uploaded: 14 Jul 2026

Which type of organic compounds contain only carbon and hydrogen atoms?

  • AHydrocarbons
  • BAlcohols
  • CCarbohydrates
  • DCarboxylic acids
1019
Chemistry Hard Uploaded: 14 Jul 2026

What are the products of the electrolysis of brine sodium chloride solution?

  • ASodium and water
  • BHydrogen chlorine and sodium hydroxide
  • CChlorine and sodium
  • DSodium chloride and water
1020
Chemistry Medium Uploaded: 14 Jul 2026

Which process involves passing an electric current through a solution to cause a chemical reaction?

  • AElectrolysis
  • BDistillation
  • CChromatography
  • DFiltration