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CSS MCQs

Civil Superior Services — Complete MCQ Bank

1,939 Questions
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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.

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891
Chemistry Medium Uploaded: 06 Aug 2026

What is the term for a solution that resists changes in pH?

  • ASaturated solution
  • BBuffer solution
  • CColloid
  • DSuspension
892
Chemistry Medium Uploaded: 06 Aug 2026

Which of these is a strong base?

  • ASodium hydroxide
  • BAmmonia
  • CAcetic acid
  • DCarbonic acid
893
Chemistry Medium Uploaded: 06 Aug 2026

What is the chemical name for rust?

  • AIron nitrate
  • BIron sulfide
  • CIron carbonate
  • DIron oxide
894
Chemistry Medium Uploaded: 06 Aug 2026

Which of the following is an alkali metal?

  • APotassium
  • BCalcium
  • CMagnesium
  • DAluminum
895
Chemistry Medium Uploaded: 06 Aug 2026

What is the term for a substance that speeds up a reaction without being consumed?

  • AReactant
  • BSolvent
  • CProduct
  • DCatalyst
896
Chemistry Medium Uploaded: 06 Aug 2026

Which of these elements is a halogen?

  • ANeon
  • BChlorine
  • CSodium
  • DCalcium
897
Chemistry Medium Uploaded: 06 Aug 2026

What is the pH range of a strong acid?

  • A11-14
  • B4-6
  • C7
  • D0-3
898
Chemistry Easy Uploaded: 06 Aug 2026

Which of these is an example of a physical change?

  • ABurning wood
  • BRusting iron
  • CBaking a cake
  • DMelting ice
899
Chemistry Hard Uploaded: 06 Aug 2026

What is Avogadro's number approximately equal to?

  • A9.8 x 10^23
  • B3.14 x 10^23
  • C6.022 x 10^23
  • D1.6 x 10^23
900
Physics Medium Uploaded: 06 Aug 2026

Which color of light has the shortest wavelength in the visible spectrum?

  • AViolet
  • BBlue
  • CRed
  • DGreen