Advertisements
Advertisements
प्रश्न
The term “water-pollution” can be defined in several ways. Which of the following statements does not give the correct definition?
पर्याय
The addition of undesirable substances to water-bodies
The removal of desirable substances from water-bodies
A change in pressure of the water bodies
A change in temperature of the water bodies
उत्तर
A change in pressure of the water bodies
Explanation:
Water pollution can be defined as an undesirable change in the physical, biological or chemical qualities of water that adversely affects aquatic life and makes water unfit for use. Water pollution is caused due to addition of undesirable substances (pollutants) to the water bodies. Polluted water may be devoid of certain desirable substances like oxygen, essential nutrients, optimum pH etc. Thermal pollution, i.e., changes in the temperature of water bodies can adversely affect aquatic organisms and cause their death.
APPEARS IN
संबंधित प्रश्न
Mention two main functions of water for living organisms.
Why is water cycle important to human?
What are the processes involved in water cycle?
The process of water changing into its vapour, is called evaporation.
The Antartic region has about ______ of the worlds fresh water.
Transpiration takes place in rivers and lakes.
In which of the following case evaporation of water will be slowest?
India accounts for ______% of all recorded species.
______ is the study of patterns, and processes in the natural world and their modifications by human activities.
How are clouds and fogs formed?
