Two different oxides of a metal contain 20% and 27% oxygen by weight. This is in accordance with
Conservation of mass
Constant proportion
Multiple proportion
Definite proportion
John Dalton proposed the law
Constant composition
Law of conservation of mass was proposed by
Neils Bohr
Debye
Lavoisier
Einstein
The sum of masses of substances before and after a chemical reaction remains constant. This law is
The reaction 2KClO3 → 2KCl + 3O2 explains the law
Law of conservation of mass
Conservation of energy
The chemical changes in which two or more substances combine to give a new compound is called
Chemical decomposition
Chemical combination
Chemical displacement
Water obtained by different sources has the ratio of weight of oxygen to hydrogen a constant. This explains
Law of definite proportion
The white ash formed when magnesium ribbon is burnt
Magnesium nitride
Magnesium oxide
Magnesium hydride
Magnesium peroxide
When barium chloride is added to sodium sulphate, the white precipitate formed is
Barium oxide
Barium nitride
Barium sulphate
Barium phosphate
When two or more elements combine to form a compound, they combined in a fixed ratio of their weights. This law is
Definite proportions
