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Chemistry MCQs

65 Questions Subject Test
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Practice the essential concepts of matter, atomic structure, chemical reactions, bonding and everyday applications of chemistry.

Atomic StructureChemical BondingReactionsOrganic Chemistry
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61
Medium css Uploaded: 07 Aug 2026

What type of reaction is photosynthesis classified as?

  • A Combustion
  • B Exothermic
  • C Endothermic
  • D Redox only
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62
Medium css fpsc ppsc Uploaded: 14 Jul 2026

Which type of chemical bond involves atoms sharing electrons unequally due to difference in electronegativity?

  • A Non-polar covalent bond
  • B Polar covalent bond
  • C Metallic bond
  • D Ionic bond
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63
Medium css Uploaded: 04 Sep 2026

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

  • A Decreases
  • B Remains constant
  • C Increases
  • D Becomes zero
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64
Medium css fpsc ppsc Uploaded: 05 Aug 2026

Which chemical process converts vegetable oils into solid fats by adding hydrogen gas?

  • A Saponification
  • B Hydrogenation
  • C Esterification
  • D Fermentation
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65
Medium css Uploaded: 07 Aug 2026

Which gas is primarily responsible for the depletion of the ozone layer?

  • A Carbon dioxide
  • B Chlorofluorocarbons
  • C Methane
  • D Nitrogen
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