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Science
The same proportion of carbon and oxygen in the carbon dioxide obtained from different sources proves the law of ______.
Chapter: [12] Atomic Structure
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In water, hydrogen and oxygen are combined in the ratio of _____ by mass.
Chapter: [12] Atomic Structure
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State the law of constant proportions.
Chapter: [12] Atomic Structure
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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?
Chapter: [12] Atomic Structure
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Name the microbe which converts atmospheric nitrogen directly into soluble nitrogen compounds.
Chapter: [11] Air
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Write any two preventive measures for acid rain.
Chapter: [11] Air
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