____________ is used for doing some mechanical work such as running a flour mill, drawing water from a well etc.
Carbondioxide
Water
Phosphorous
Sulphur
The simplest method to obtain pure water free from soluble impurities is
Crystallisation
Condensation
Distillation
Filtration
Wells and springs are __________ sources
Fresh e=water
Surface water
Salt water
Underground water
____________ is essential for photosynthesis.
Oxygen
Carbon monoxide
Nitrogen
A substance which cause pollution is called a
Pollutant
Solvent
Solute
Solution
________________ is essential for the growth of plants.
Carbon
Lithium
___________ is used for removing suspended impurities in water.
Sedimentation
Boiling
Chlorination
Aeration
_________ is known as universal solvent.
Alcohol
Liquid oxygen
Ether
The continuous circulation of water in nature is called
Water cycle
Nitrogen cycle
Oxygen cycle
Hydrogen cycle
Which is the process of removing dissolved salts from sea or ocean water?
Desalination
Electrolysis
Osmosis
Hydrolysis
