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Question

Who among the following is credited with the discovery of the law of conservation of mass?

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RRB NTPC 2025 Graduate CBT 2 Question Paper PDF (10-Jul-2026) (Shift 1)
The correct answer is

Antoine Lavoisier

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed, so the total mass of reactants equals the total mass of products.

The French chemist Antoine Lavoisier established this law through careful quantitative experiments with combustion in closed systems in the 1770s, earning him recognition as the father of modern chemistry.

John Dalton is credited with the atomic theory, Dmitri Mendeleev with the periodic table, and Joseph Priestley with the discovery of oxygen, so none of them formulated this law.

Hence, the law of conservation of mass is credited to Antoine Lavoisier.

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