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प्रश्न
The atomic theory of matter was proposed by :
विकल्प
John Kennedy
Lavoisier
Proust
John Dalton
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उत्तर
John Dalton
The atomic theory of matter was proposed by John Dalton.
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संबंधित प्रश्न
Which postulate of Dalton’s atomic theory can explain the law of definite proportions?
Which part of the Dalton's atomic theory came from the law of constant proportions given by Proust ?
Name any two laws of chemical combination.
In water, the proportion of oxygen and hydrogen by mass is :
What do we call those particles which have more electrons than the normal atoms ?
What do we call those particles which have less electrons than the normal atoms ?
Work out the formulae for the following compounds:
Calcium carbonate
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.
State the law of constant proportions.
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?
