Chemical changes are
temporary
partial
permanent
none of these
Properties such as shape,size,colour and state of a substance are called its ________ properties.
Physical
Chemical
Thermal
Thermodynamic
A change in which a substance undergoes a change in its physical properties is called a ________ change.
The chemical name of baking soda is
Sodium carbonate
Sodium hydrogen carbonate
Calcium phosphate
Calcium oxychloride
Burning of any substance is a _________ change.
Temporary
Reversible
___________ is known as blue Vitriol.
Copper sulphate
Ferrous sulphate
Sulphuric acid
Zinc oxide
Melting of ice is an example of:
Exothermic reaction
Endothermic reaction
Chemical combination
Chemical decomposition
We keep food at low temperature in a refrigerator because it:
Saves money
Makes food more tastier
Kills bacteria present in the food
In fashionable to keep the food in the refrigerator
The formation of rust on the surface of iron is called __________ of iron.
rusting
melting
condensation
A chemical change is also called
Reversible change
Physical change
Temporary change
Chemical reaction
