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Chemistry MCQs

417 Questions Subject Test
Subject Preparation Guide

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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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301
Medium pms Uploaded: 04 Sep 2026

Which of the following best describes a metallic bond?

  • A Attraction between polar molecules
  • B Transfer of electrons between atoms
  • C Sharing of electron pairs
  • D Sea of delocalized electrons around metal cations
302
Medium nts Uploaded: 04 Sep 2026

Which theory explains the formation of coordinate covalent bonds?

  • A Bohr theory
  • B Lewis theory
  • C Kinetic theory
  • D Arrhenius theory
303
Easy ppsc nts Uploaded: 14 Jul 2026

What is the chemical symbol for lead?

  • A Pb
  • B Ld
  • C Le
  • D Li
304
Easy nts Uploaded: 07 Aug 2026

Which of these is a noble gas?

  • A Argon
  • B Bromine
  • C Sulfur
  • D Chlorine
305
Easy ppsc Uploaded: 04 Sep 2026

What is the SI unit of molar concentration?

  • A g/mol
  • B mol/L
  • C mol/kg
  • D g/L
306
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for ozone, the molecule that forms the protective layer in the stratosphere?

  • A O
  • B O2
  • C O3
  • D O4
307
Easy fpsc Uploaded: 06 Aug 2026

What is the common name for sodium bicarbonate?

  • A Caustic soda
  • B Washing soda
  • C Baking soda
  • D Bleaching powder
308
Hard css Uploaded: 07 Aug 2026

What is the term used for the study of heat changes in chemical reactions?

  • A Electrochemistry
  • B Thermochemistry
  • C Photochemistry
  • D Stoichiometry
309
Easy nts Uploaded: 04 Sep 2026

What is the strongest type of acid based on ionization?

  • A Amphoteric acid
  • B Diprotic acid
  • C Strong acid
  • D Weak acid
310
Easy fpsc ppsc nts Uploaded: 05 Aug 2026

What is the IUPAC name for CH3-CH2-OH the simplest alcohol found in beverages?

  • A Methanol
  • B Propanol
  • C Butanol
  • D Ethanol
311
Medium fpsc Uploaded: 04 Sep 2026

Which compound is commonly known as washing soda?

  • A Sodium sulfate
  • B Sodium carbonate
  • C Sodium bicarbonate
  • D Sodium chloride
312
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which test is used to detect the presence of starch using iodine solution?

  • A Benedict's test
  • B Biuret test
  • C Iodine test
  • D Flame test
313
Easy nts Uploaded: 07 Aug 2026

What is the chemical name for vinegar's active ingredient?

  • A Formic acid
  • B Citric acid
  • C Ethanol
  • D Acetic acid
314
Medium css Uploaded: 04 Sep 2026

Which polymer is formed from the monomer ethylene?

  • A Polypropylene
  • B PVC
  • C Polyethylene
  • D Polystyrene
315
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which element is a liquid at room temperature and is used in thermometers?

  • A Bromine
  • B Gallium
  • C Mercury
  • D Caesium
316
Hard css Uploaded: 04 Sep 2026

What is nuclear fission?

  • A Splitting of a heavy nucleus into smaller nuclei
  • B Loss of an electron from an atom
  • C Emission of alpha particles only
  • D Combining of light nuclei into a heavier one
317
Hard css Uploaded: 06 Aug 2026

What is Avogadro's number approximately equal to?

  • A 9.8 x 10^23
  • B 3.14 x 10^23
  • C 6.022 x 10^23
  • D 1.6 x 10^23
318
Hard fpsc Uploaded: 04 Sep 2026

Real gases deviate most from ideal behavior under which conditions?

  • A Low pressure and high temperature
  • B High pressure and high temperature
  • C High pressure and low temperature
  • D Low pressure and low temperature
319
Hard pms Uploaded: 04 Sep 2026

What is electron affinity?

  • A Ability to attract shared electrons
  • B Energy needed to remove an electron
  • C Energy to break a bond
  • D Energy change when an atom gains an electron
320
Hard css fpsc Uploaded: 14 Jul 2026

Which law states that gases combine in simple whole number ratios by volume at the same temperature and pressure?

  • A Gay-Lussac's Law
  • B Boyle's Law
  • C Charles's Law
  • D Avogadro's Law
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