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प्रश्न
State the law of constant proportions.
उत्तर
The Law of constant proportions states that in a pure chemical compound the elements are always present in definite proportions by mass.
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संबंधित प्रश्न
Name the scientist who gave law of constant proportions.
Name the scientist who gave atomic theory of matter.
Which postulate of Dalton's atomic theory is the result of law of conservation of mass given by Lavoisier ?
Give one major drawback of Dalton's atomic theory of matter.
In an experiment, 4.90 g of copper oxide was obtained from 3.92 g of copper. In another experiment, 4.55 g of copper oxide gave, on reduction, 3.64 g of copper. Show with the help of calculations that these figures verify the law of constant proportions.
What do we call those particles which have more or less electrons than the normal atoms ?
What do we call those particles which are formed by the gain of electrons by atoms ?
Two samples ‘m’ and ‘n’ of slaked lime were obtained from two different reactions. The details about their composition are as follows:
- ‘sample m’ mass: 7g
- Mass of constituent oxygen: 2g
- Mass of constituent calcium: 5g
- ‘sample n’ mass: 1.4g
- Mass of constituent oxygen: 0.4g
- Mass of constituent calcium: 1.0g
Which law of chemical combination does this prove? Explain.
In water, hydrogen and oxygen are combined in the ratio of _____ by mass.
Ruthresh, Hari, Kanishka, and Thahera collected different samples of water from a well, a pond, a river, and underground water. All these samples were sent to a testing laboratory. The test result showed the ratio of hydrogen to oxygen as 1:8.
- What conclusion would you draw from the above experiment?
- Which law of chemical combination does it obey?
