What happens to the water table of a place having droughts for a long period of time ?
It gets higher because of continuous evaporation
It gets lower because of continuous evaporation and flow
It remains the same because soil protects it from the heat
It gets replenished continuously
In early winter mornings, we can see drops of water on the blades of grass. This is because of
Photosynthesis
Transpiration
Condensation
Water cycle
Which of the following is potable water
A glass of water fit for drinking
Water in a pot
Sea water
Water with bacteria and chemicals
Rain water harvesting is
Storing ground water by not using water from the well
Stop growing crops to save water
Allowing water to go into rivers and lakes
Collecting rainwater and storing it for later use
The density of water is not same at all temperatures because of its anomalous expansion. The density is maximum at
00 C
40 C
400 C
1000 C
Which of the following statement is true ?
The salinity of rivers increase with time
The salinity of rivers decrease with time
The salinity of seas increase with time
The salinity of seas decrease with time
Water is called the universal solvent because
It dissolves in most of the liquids
It can dissolve most of the substances
It contains many salts and minerals
It can exist in three states
When hydrogen and oxygen combine to form water, they form
An unstable compound
A stable mixture
An unstable mixture
An extremely stable compound
Which of the following is polluted by man or factories ?
Ponds
Rivers
Ground water
All
Which of the following processes cannot take place in the absence of oxygen ?
Combustion
Respiration
Oxidation
All of these
