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प्रश्न
State a reason to prove that water is a compound and not a element.
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उत्तर
Three reasons are :
- Water has new properties than its constituents [i.e. H2 and O2]. H2 is a combustible gas, O2 gas is a supporter of combustion but water is liquid.
- In water hydrogen and oxygen, elements combine in fixed ratio by weight 1 : 8.
- Components of water i.e. H2 and oxygen can be separated by chemical means e.g. by electrolysis of water.
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संबंधित प्रश्न
What do you understand by the term ’auto-protolysis’ of water? What is its significance?
Write chemical reactions to show the amphoteric nature of water.
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(a) Cold water
(b) Boiling water
(c) Steam to liberate hydrogen in each case.
How does it occur in the free state and in the combined state.
Pure water is ______ and it shows no action towards litmus paper.
Write a short note on the catalytic nature of water.
Write the chemical equation for the production of water when zinc reacts with sulphuric acid.
Polyphosphates are used as water softening agents because they ______.
The metal that gives hydrogen gas upon treatment with both acid as well as base is ______.
