Solute : It is the substance added in small amount to a solvent to form solution.
NaCl is solute in salt water
Solvent: it the substance taken in large amount to dissolve solute and hence to form solution.
In Salt solution the water is solvent
Solution : it is the homogeneous mixture of solvent (taken in larger amount) and solute (taken in small amount) .There is no distinct physical boundary between solvent and solute in a solution
Swimming pool is an example of solution as it contains solvent (water) and dissolve ions or chemicals (solute)
Reactant: it is the substance which reacts in a reaction
product: the reactants react in a reaction to produce another substance known as product.