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प्रश्न
Describe the usefulness of water in biosphere and biological systems.
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उत्तर
Water is essential for all forms of life. It constitutes around 65% of the human body and 95% of plants. Water plays an important role in the biosphere owing to its high specific heat, thermal conductivity, surface tension, dipole moment, and dielectric constant.
The high heat of vapourization and heat of capacity of water helps in moderating the climate and body temperature of all living beings.
It acts as a carrier of various nutrients required by plants and animals for various metabolic reactions.
संबंधित प्रश्न
Why is it said that-
Water is a universal solvent.
Why is it said that-
There is no alternative to water for cleaning purposes.
Explain the picture in your own words.
Why is the density of seawater more than that of rain water?
Why should a glass bottle completely filled with water never be kept in a freezer?
Which of the following equations depict the oxidising nature of \[\ce{H2O2}\]?
Which of the following equation depicts reducing nature of \[\ce{H2O2}\]?
Some of the properties of water are described below. Which of them is/are not correct?
(i) Water is known to be a universal solvent.
(ii) Hydrogen bonding is present to a large extent in liquid water.
(iii) There is no hydrogen bonding in the frozen state of water.
(iv) Frozen water is heavier than liquid water.
Give reasons: Ice floats on water.
Write two reactions to explain amphoteric nature of water.
The boiling point of water increases with ______ in pressure.
The freezing point of water ______ with an increase in pressure.
Freezing of water will cause an ______ is the volume.
______ has the highest latent heat of fusion.
One gram of water requires ______ of heat to raise its temperature by l°C.
What is the taste of distilled water & boiled water?
Which of the following ion is responsible for the temporary hardness of water?
The water having more dissolved O2 is ______.
