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प्रश्न
Which postulate of Dalton's atomic theory can explain the law of conservation of mass ?
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उत्तर
Dalton’s third postulate explains the law of conservation of mass. It states that atoms can neither be created nor destroyed.
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संबंधित प्रश्न
In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.
Sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water
What do you observe when, barium chloride solution is mixed with sodium sulphate solution ?
Name the scientist who gave law of conservation of mass.
Name the law of chemical combination which was given by Lavoisier.
Name the law of chemical combination which was given by Proust.
Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium
sulphate. In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form
9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is illustrated by this data ? Give reason for your choice.
Potassium chlorate decomposes, on heating, to form potassium chloride and oxygen. When 24.5 g of potassium chlorate is decomposed completely, then 14.9 g of potassium chloride is formed. Calculate the mass of oxygen formed. Which law of chemical combination have you used in solving this problem ?
Complete the statement given below by filling in the blanks with the correct words.
Atoms contain ________ with positively charged ________.
Match the following.
| Law of conservation of mass | Sir William Crookes |
| Law of constant proportion | James Chadwick |
| Cathode rays | Joseph Proust |
| Anode rays | Lavoisier |
| Neutrons | Goldstein |
Name the four laws of chemical combinations.
