Chemical reaction and equations worksheet-1
Fill in the Blanks:
CO2(s) → CO2(g) is a __________ change.
Water evaporates from the surface of the ocean. It is a _________change.
Change in odor, or color is a_______ change.
Rusting is a__________ change.
Cutting of trees is a__________ change.
Rusting of iron occurs due to __________.(Oxidation/reduction)
The balanced equation has __________ molecules of water.
The balanced equation has ________ molecules of Aluminium hydroxide.
This is a _______ reaction.
_________ is oxidized.
Reduction is _______ of electron.
Reducing agent is one which _______ electrons.
Gold and platinum do not corrode in moist air as they are ______ reactive.
The names of CO32– is__________ .
The name of SO42– is__________
The name of (COO)22– is__________
Calcium hydroxide + carbon di-oxide → __________ + Water
Zn + CuSO4 → ZnSO4 + CU(s), is an example of _________reaction.
In Corrosion iron is oxidized by oxygen of air in the presence of moisture forming ________.
Silver quickly acquires a thin black layer of __________.
Answer keys:
Physical or Physical change
Physical or Physical change
Chemical or Chemical change
Chemical or Chemical change
Physical or Physical change
Oxidation
2
1
Displacement
Carbon mono-oxide
Gain
Looses
Less
carbonate ion
sulphate ion
oxalate ion
Calcium carbonate
Displacement
Hydrated iron oxide
silver sulphide
