In which of the following years did Antoine Lavoisier discover the law of conservation of mass and state that mass is conserved in a chemical reaction?

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  1. 1786
  2. 1787
  3. 1788
  4. 1789

Answer (Detailed Solution Below)

Option 4 : 1789
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SSC CPO : General Intelligence & Reasoning Sectional Test 1
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The correct answer is 1789

Key Points

  • 1789 is the year when Antoine Lavoisier discovered the law of conservation of mass.
  • The law states that mass is conserved in a chemical reaction, meaning the mass of the reactants equals the mass of the products.
  • This discovery was fundamental in the advancement of chemistry, establishing it as a quantitative science.
  • Lavoisier is often referred to as the "Father of Modern Chemistry" due to his significant contributions to the field.

Additional Information

  • Antoine Lavoisier also helped to construct the metric system, wrote the first extensive list of elements, and helped to reform chemical nomenclature.
  • His work disproved the phlogiston theory of combustion and led to the discovery of the role of oxygen in combustion.
  • Lavoisier's contributions laid the groundwork for future discoveries in chemistry and greatly influenced the scientific method.
  • Despite his scientific achievements, Lavoisier was executed during the French Revolution in 1794.
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