Rusting of iron takes place faster with the contact of
Water
Air
Common salt
Oil
Reactants are written on ______________ side of chemical equation.
Right
Left
Both
None of these
Chemical reaction result in _________________ change
Temporary
Permenant
Periodic
Natural
Chemical reactions are not possible without _______________ changes
Physical
Color
Energy
________________ are written on the left side of the chemical equation.
Products
Reactants
Pollutions
Acids
Copper sulphate is ________________ in color.
Blue
Green
Yellow
White
What is the color of copper oxide?
Black
Violet
Substance taking part in a reaction are called
Product
Reactant
Pollutant
