The continuous circulation of water in nature is called:
water cycle
nitrogen cycle
oxygen cycle
hydrogen cycle
Solution of any substance in water is known as:
saturated solution
aqueous solution
supersaturated solution
unsaturated solution
When in a sugar solution ,sugar is soluble in water , which acts as a solute?
Water
Sugar
Both sugar and water
None of these
Economical use and avoiding the wastage of water is called:
distillation of water
condensation of water
conservation of water
crystallisation of water
___________ protect our crops from pests.
Insecticides
Fertilizers
Pesticides
In which form water exists as water vapour or steam?
liquid form
solid state
gaseous form
combined state
Plants release water into the air by:
transpiration
breathing
condensation
crystallization
Rivers, Lakes and ponds are called
surface water
fresh water
salt water
underground water
Sea and ocean water contains large amount of salt and these make the water salty and is called:
distilled water
rain water
saline water
well water
It is used as coolant.
Sulphur
Phosphorous
Carbon dioxide