Questions & Answers
Browse all 18 questions from the
Historical Milestones in Chemistry study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which scientist is credited with the discovery of oxygen in 1774?
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A
Joseph Priestley
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B
Antoine Lavoisier
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C
John Dalton
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D
Dmitri Mendeleev
2
In what year did Dmitri Mendeleev publish his first version of the Periodic Table of Elements?
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A
1859
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B
1869
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C
1879
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D
1889
3
Which chemical element was discovered by Marie and Pierre Curie in 1898?
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A
Uranium
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B
Thorium
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C
Radium
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D
Plutonium
4
Who proposed the law of definite proportions, stating that chemical compounds always contain the same elements in the same mass proportions?
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A
Robert Boyle
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B
Joseph Proust
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C
Amedeo Avogadro
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D
Henry Cavendish
5
What substance did Humphry Davy isolate in 1807 using electrolysis, marking the first time it was obtained in its metallic form?
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A
Sodium
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B
Calcium
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C
Magnesium
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D
Aluminum
6
Which scientist is known for developing the theory of atomic structure, specifically the 'plum pudding' model?
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A
Niels Bohr
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B
Ernest Rutherford
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C
J.J. Thomson
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D
James Chadwick
7
The Haber-Bosch process, developed in the early 20th century, revolutionized the production of which essential chemical compound?
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A
Sulfuric acid
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B
Ammonia
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C
Sodium chloride
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D
Ethanol
8
Who coined the term 'radioactivity' to describe the phenomenon observed in uranium salts?
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A
Henri Becquerel
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B
Marie Curie
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C
Wilhelm Röntgen
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D
Ernest Lawrence
9
In 1828, which chemist demonstrated that urea, an organic compound, could be synthesized from inorganic materials?
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A
Friedrich Wöhler
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B
August Kekulé
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C
Jacob Berzelius
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D
Louis Pasteur
10
What gas did Henry Cavendish identify as 'inflammable air' in 1766, later named by Lavoisier?
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A
Nitrogen
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B
Oxygen
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C
Hydrogen
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D
Helium
11
Which English chemist formulated the Law of Octaves in 1864, observing periodic patterns in elements?
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A
John Newlands
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B
William Ramsay
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C
Henry Moseley
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D
Glenn Seaborg
12
The 1953 discovery of the double-helix structure of DNA involved chemical analysis performed by which researcher?
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A
Rosalind Franklin
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B
Linus Pauling
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C
Francis Crick
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D
James Watson
13
Which element, discovered in 1894 by Lord Rayleigh and William Ramsay, was the first noble gas to be identified?
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A
Neon
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B
Krypton
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C
Argon
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D
Xenon
14
Who developed the pH scale in 1909 while working at the Carlsberg Laboratory in Copenhagen?
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A
Søren Sørensen
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B
Svante Arrhenius
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C
Gilbert Lewis
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D
Walther Nernst
15
Which element was identified by spectral analysis during a solar eclipse in 1868 before it was found on Earth?
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A
Gallium
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B
Helium
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C
Indium
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D
Thallium
16
What significant chemical discovery did Robert Bunsen and Gustav Kirchhoff pioneer in 1859?
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A
Electrolysis
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B
Radio-carbon dating
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C
Spectroscopy
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D
Chromatography
17
Which scientist proved the existence of the neutron in 1932?
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A
James Chadwick
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B
Werner Heisenberg
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C
Enrico Fermi
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D
Wolfgang Pauli
18
Who was the first woman to win a Nobel Prize in Chemistry for the discovery of the elements radium and polonium?
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A
Irene Joliot-Curie
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B
Dorothy Hodgkin
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C
Marie Curie
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D
Gerty Cori
