A change in which a substance undergoes a change in its physical properties is called a ________ change.
Thermal
Chemical
Thermodynamic
Physical
Burning of any substance is a _________ change.
Temporary
Reversible
A change in which composition and chemical properties of the substance gets changed is called___________.
Physical change
Chemical change
Ionic change
None
________ protects us from the harmful ultraviolet radiation.
Oxygen
Hydrogen
Fluorine
Ozone
__________ turns lime water milky.
Carbondioxide
Carbonmonoxide
The process of formation of a film of brownish substance on the surface of iron when it is exposed to air is known as _________.
Rusting
Reduction
Cracking
Temporing
A change in which one or more new substances are formed is called a _________ change.
The formation of rust on the surface of iron is called __________ of iron.
rusting
melting
condensation
none
Burning of Magnesium ribbon is a ________ change.
Properties such as shape,size,colour and state of a substance are called its ________ properties.