_________ is the process in which vapour of a liquid on cooling get converted into the liquid at some fixed temperature.
Condensation
Boiling
Evaporation
None of these
Heart beat is a _________ change.
None periodic
Periodic
Reversible
The changes which do not repeat themselves at regular intervals of time are called __________ changes.
Non periodic
Both A$B
Sublimation is a ___________ change.
Physical
Chemical
Desirable
Burning of coal is ____________ change.
Endothermic
Exothermic
__________ is the process by which a solute gets dissolved in a solvent.
Dissolution
Evoporation
Dissolution of common salt is a ________ change.
Periodic changes takes place repeatedly after a certain _________ of time.
Fixed interval
Unfixed interval
Both A&B
From the below changes which change gives us harmful effects?
Flood
Ripening of fruits
Fermentation of rice dough
Decaying of organic wastes into organic manure
Will the steam from seawater be salty?
Yes
No
Some of the steam will be salty
