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प्रश्न
How does it occur in the free state and in the combined state.
उत्तर
Water occurs in free state : In the form of ice, snow, frost
As – river water, lake water, sea water, spring water
As – water vapour, clouds, mist, fog
In combined state : In plants and animals, in hydrated salts i.e., MgCl2.6H2O and in certain minerals, milk, dry cereals and in green vegetables.
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संबंधित प्रश्न
Consider the reaction of water with F2 and suggest, in terms of oxidation and reduction, which species are oxidized/reduced.
Complete the following chemical reaction.
\[\ce{MnO^-_{4(aq)} + H_2O_{(g)} ->}\]
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
Write chemical reactions to show the amphoteric nature of water.
Give a reason why metals are arranged in a series called – ‘activity series of metals’. Name a metal which reacts with
(a) Cold water
(b) Boiling water
(c) Steam to liberate hydrogen in each case.
Give a balanced equation for the following conversion:
Iron to triiron tetroxide using steam.
The density of water is maximum at ________.
Which one of the following has the highest latent heat of vaporization?
Pure water is ______ and it shows no action towards litmus paper.
Write a short note on the catalytic nature of water.
The metal that gives hydrogen gas upon treatment with both acid as well as base is ______.
