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Advanced High School Chemistry Challenge

Chemistry

A challenging collection of chemistry questions covering atomic theory, thermodynamics, and stoichiometry.

science education chemistry
10 Questions Hard Ages 13+ Jul 31, 2026
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About this Study Set

This study set covers Chemistry through 10 practice questions. A challenging collection of chemistry questions covering atomic theory, thermodynamics, and stoichiometry. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 10 questions from the Advanced High School Chemistry Challenge study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which element has the highest first ionization energy in the periodic table?
  • A Helium
  • B Fluorine
  • C Neon
  • D Hydrogen
2 What is the formal name of the process by which a solid transitions directly into a gas without passing through the liquid phase?
  • A Deposition
  • B Condensation
  • C Sublimation
  • D Evaporation
3 In a voltaic cell, which electrode is defined as the site where reduction occurs?
  • A Anode
  • B Cathode
  • C Salt bridge
  • D Electrolyte
4 Which scientist is credited with proposing the Law of Octaves, noting that elements exhibit repeating properties every eighth element?
  • A Dmitri Mendeleev
  • B John Newlands
  • C Henry Moseley
  • D Lothar Meyer
5 What is the molecular geometry of a molecule with a central atom bonded to four other atoms with no lone pairs, such as methane (CH4)?
  • A Trigonal planar
  • B Bent
  • C Tetrahedral
  • D Linear
6 According to the Arrhenius definition, what is produced when an acid dissociates in an aqueous solution?
  • A Hydroxide ions
  • B Hydrogen ions
  • C Chloride ions
  • D Ammonium ions
7 What is the standard unit used to describe the enthalpy of a chemical reaction?
  • A Joules per mole
  • B Newtons per square meter
  • C Watts
  • D Kelvin
8 Which quantum number describes the shape of the orbital in which an electron resides?
  • A Principal
  • B Magnetic
  • C Spin
  • D Azimuthal
9 What is the maximum number of electrons that can be held in a 'd' subshell?
  • A 2
  • B 6
  • C 10
  • D 14
10 Which law states that the total pressure of a mixture of non-reacting gases is equal to the sum of the partial pressures of the individual gases?
  • A Boyle's Law
  • B Dalton's Law
  • C Charles's Law
  • D Avogadro's Law
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