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Chemistry MCQs

154 Questions Subject Test
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Atomic StructureChemical BondingReactionsOrganic Chemistry
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41
Hard fpsc Uploaded: 04 Sep 2026

Which type of catalyst exists in the same phase as the reactants?

  • A Autocatalyst
  • B Homogeneous catalyst
  • C Enzyme only
  • D Heterogeneous catalyst
42
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Alkane
  • B Alkyne
  • C Alkene
  • D Arene
43
Easy fpsc Uploaded: 04 Sep 2026

What is a combination (synthesis) reaction?

  • A Two or more substances combine to form one product
  • B One substance breaks into many
  • C An element replaces another in a compound
  • D Two compounds exchange parts
44
Hard css fpsc ppsc Uploaded: 14 Jul 2026

What is the term for the energy required to remove one electron from a gaseous atom?

  • A Electron affinity
  • B Electronegativity
  • C Lattice energy
  • D Ionisation energy
45
Hard css fpsc ppsc Uploaded: 14 Jul 2026

Which element has the highest electronegativity on the Pauling scale?

  • A Oxygen
  • B Chlorine
  • C Nitrogen
  • D Fluorine
46
Hard css fpsc ppsc Uploaded: 14 Jul 2026

What is the chemical formula for potassium permanganate a strong oxidising agent?

  • A KMnO4
  • B K2MnO4
  • C K2SO4
  • D K2Cr2O7
47
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for sulfuric acid?

  • A H2SO4
  • B HNO3
  • C HCl
  • D H3PO4
48
Medium css fpsc ppsc Uploaded: 14 Jul 2026

Which type of formula shows all the bonds between atoms in a molecule?

  • A Empirical formula
  • B Structural formula
  • C Molecular formula
  • D Ionic formula
49
Medium css fpsc ppsc Uploaded: 05 Aug 2026

Which type of organic reaction adds atoms across a carbon to carbon double bond in alkenes?

  • A Substitution
  • B Addition
  • C Elimination
  • D Hydrolysis
50
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for sulfur dioxide a gas that causes acid rain?

  • A SO3
  • B S2O
  • C SO
  • D SO2
51
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for glucose, the primary energy source for cells?

  • A C6H10O5
  • B C12H22O11
  • C C6H12O6
  • D C6H6O6
52
Medium fpsc Uploaded: 04 Sep 2026

Which term refers to an atom's tendency to attract shared electrons in a bond?

  • A Atomic radius
  • B Electron affinity
  • C Ionization energy
  • D Electronegativity
53
Medium css fpsc ppsc Uploaded: 14 Jul 2026

What does Avogadro's number represent?

  • A Number of atoms in 1 gram of hydrogen
  • B Number of particles in one mole of a substance
  • C Number of molecules in 1 litre of gas
  • D Number of protons in a nucleus
54
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which scientist is known as the Father of Modern Chemistry?

  • A Isaac Newton
  • B Robert Boyle
  • C John Dalton
  • D Antoine Lavoisier
55
Medium fpsc Uploaded: 04 Sep 2026

Which term refers to the maximum amount of solute that dissolves in a given solvent at a specific temperature?

  • A Solubility
  • B Concentration
  • C Molarity
  • D Density
56
Hard css fpsc Uploaded: 14 Jul 2026

What is the chemical formula for chloroform a once common anaesthetic?

  • A CH2Cl2
  • B CCl4
  • C CHCl2
  • D CHCl3
57
Medium css fpsc ppsc Uploaded: 05 Aug 2026

Which process hardens rubber by adding sulfur making it stronger and more elastic?

  • A Vulcanisation
  • B Saponification
  • C Hydrogenation
  • D Polymerisation
58
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the SI unit of the amount of substance in chemistry?

  • A Gram
  • B Litre
  • C Kilogram
  • D Mole
59
Easy fpsc Uploaded: 07 Aug 2026

What is the chemical formula of ozone?

  • A O4
  • B O
  • C O2
  • D O3
60
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the name of the process by which a liquid changes to a gas at its boiling point?

  • A Vaporisation
  • B Sublimation
  • C Condensation
  • D Freezing
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