CHEMISTRY [1 Mark Question Answer]

Rainwater is the purest form of water as it is distilled water i.e. water from the surface of the earth has evaporated and then vapours condense in the atmosphere.

Seawater contains the highest concentration of salt.

Water is present in the form of water vapours in the atmosphere.

Two sources of underground water :
1. Well water
2. Springwater

Four sources of surface water sources:
1. Ocean water
2. River water
3. Lake water
4. Glaciers

Three major sources of natural water:
1. Surface water (seawater)
2. Above surface water (rain)
3. Underground water (springs)

A homogenous mixture of a solute in a solvent is called a solution

A solvent is a medium in which a solute dissolves. It is in large quantity in a solution. Water is the most common solvent. The other solvents are alcohol, carbon tetrachloride, etc.
Example: Water

A solute is a substance that dissolves in a medium which can be water or any other substance. A solute is in a smaller quantity in a solution. e.g. sodium chloride..

Uses of Water in Agriculture :
In agriculture, water finds importance in irrigation, production of crops & as a medium for spraying pesticides.

The importance of Water in Transportation as follows:
Water serves as a habitat for marine life i.e. preferred place for an organism to live.

The importance of Water in Fire fighting as follows:
Water is used for extinguishing fires either directly or as a constituent in a fire extinguisher.

The importance of Water in Household purposes as follows:
Water finds numerous applications, such as watering plants, washing clothes, cooking, bathing, cleaning, etc.

The importance of Water in life processes as follow:
Water is used by all plants, animals & humans for carrying out various metabolic processes including photosynthesis by plants & excretion by animals & humans.

Drip irrigation in agriculture utilizes the supply of water in small quantities.

Polluted water acts as a carrier for germs which causes various diseases.

Because only a small percentage is portable water fit for human consumption and household purposes.

The gases which are not soluble in water are Nitrogen, hydrogen

The gases which are soluble in water are Carbon dioxide and chlorine