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Chemistry MCQs

164 Questions Subject Test
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Atomic StructureChemical BondingReactionsOrganic Chemistry
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61
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
62
Easy ppsc nts Uploaded: 14 Jul 2026

Which noble gas is used in glowing advertising signs giving a reddish-orange colour?

  • A Argon
  • B Helium
  • C Neon
  • D Krypton
63
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
64
Medium ppsc Uploaded: 04 Sep 2026

What is quicklime chemically known as?

  • A Calcium sulfate
  • B Calcium carbonate
  • C Calcium hydroxide
  • D Calcium oxide
65
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
66
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
67
Medium ppsc Uploaded: 04 Sep 2026

Which law states that the total pressure of a gas mixture equals the sum of partial pressures?

  • A Graham's Law
  • B Henry's Law
  • C Avogadro's Law
  • D Dalton's Law
68
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
69
Hard ppsc Uploaded: 04 Sep 2026

What is the order of a reaction if rate is proportional to the square of reactant concentration?

  • A Second order
  • B Zero order
  • C First order
  • D Third order
70
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
71
Easy ppsc nts Uploaded: 14 Jul 2026

What is the chemical symbol for silver?

  • A Si
  • B Ag
  • C Sr
  • D Sn
72
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
73
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
74
Easy ppsc Uploaded: 04 Sep 2026

Which functional group is present in alcohols?

  • A -COOH
  • B -NH2
  • C -OH
  • D -CHO
75
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
76
Hard ppsc Uploaded: 04 Sep 2026

What is the term for the heat required to convert a liquid to gas at its boiling point?

  • A Heat of formation
  • B Latent heat of fusion
  • C Specific heat capacity
  • D Latent heat of vaporization
77
Hard css fpsc ppsc Uploaded: 14 Jul 2026

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

  • A Sodium and water
  • B Hydrogen chlorine and sodium hydroxide
  • C Chlorine and sodium
  • D Sodium chloride and water
78
Medium css fpsc ppsc Uploaded: 14 Jul 2026

What is formed when an alcohol reacts with a carboxylic acid?

  • A Ester and water
  • B Salt and water
  • C Soap
  • D Alkene and water
79
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for methane, the main component of natural gas?

  • A C2H6
  • B CH4
  • C C3H8
  • D C2H4
80
Medium ppsc Uploaded: 04 Sep 2026

What is the empirical formula of glucose (C6H12O6)?

  • A CHO
  • B C3H6O3
  • C C6H12O6
  • D CH2O
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