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Question

Select the correct law for the following statement.

During a chemical reaction mass is neither created nor destroyed.

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

Law of conversion of mass

The correct answer is option 3 i.e. Law of conversion of mass.

  • The statement 'During a chemical reaction, mass is neither created nor destroyed' is explained by the Law of conservation of mass, proposed by Antoine Lavoisier in the 18th century.
  • This fundamental law states that the total mass of reactants equals the total mass of products in a closed system.
  • This principle emphasizes that atoms are neither created nor destroyed, only rearranged, ensuring mass constancy.
  • The Law of conservation of mass is essential for balancing chemical equations and plays a crucial role in understanding chemical reactions.
  • It forms a foundation for modern chemistry and stoichiometry.
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