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प्रश्न
How does it occur in the free state and in the combined state.
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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
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.
Complete the following chemical reaction.
\[\ce{CaO_{(s)} + H_2O_{(g)} ->}\]?
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
Complete the following chemical reaction.
\[\ce{Ca_3N_{2(s)} + H_2O_{(l)} ->}\] ?
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
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 ________.
How can production of hydrogen from water gas be increased by using water gas shift reaction?
Which one of the following has the highest latent heat of vaporization?
______ does not react with water at any temperature.
Polyphosphates are used as water softening agents because they ______.
