Silver nitrate + potassium bromide ---> silver bromide + Potassium nitrate.The above reaction is an example of:
Combination reaction
Decomposition reaction
Precipitation reaction
Displacement reaction
Which is the smallest identifiable unit of a compound?
Atom
Molecule
Mole
Ion
The symbol Na stands for
Sodium
Potassium
Iron
Lead
Pure substances can be again classified into
Elements, compounds
Atoms, molecules
Atoms, ions
Solutes, solvents
The symbol Ag stands for
Mercury
Copper
Silver
Gold
Which method is used to extract salts dissolved in sea water?
Evaporation
Crystallization
Precipitation
Filtration
A change in which no new substances are forms and which can generally be reversed by reversing the conditions is called
Physical change
Chemical change
Exothermic reaction
Endothermic reaction
The chemical reaction in which a compound breaks down to two or more simple substances is called
Combination
Decomposition
Dissolution
The process of coating iron surface with grease, oil or paint is called
Barrier protection
Rusting
Galvanization
The exposed surface of sliced brinjal turns:
White
Red
Yellow
Black
