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प्रश्न
The atomic theory of matter was proposed by :
पर्याय
John Kennedy
Lavoisier
Proust
John Dalton
उत्तर
John Dalton
The atomic theory of matter was proposed by John Dalton.
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संबंधित प्रश्न
Name any two laws of chemical combination.
State the law of constant proportions. Give one example to illustrate this law.
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 electrons than the normal atoms ?
What do we call those particles which are formed by the gain of electrons by atoms ?
Work out the formulae for the following compounds :
Sodium oxide
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.
The same proportion of carbon and oxygen in the carbon dioxide obtained from different sources proves the law of ______.
In water, hydrogen and oxygen are combined in the ratio of _____ by mass.
State the law of constant proportions.
