Answer:
1. Inevitably the question forces itself upon the mind, is not some fuller synthesis possible?
2. This process is called conceptual synthesis, the possibility of which is a sine qua non for the exchange of information by speech and writing.
3. This dogma was shaken by Wohler's synthesis of urea in 1828.
4. Chemically pure sodium nitrate can be obtained by repeated recrystallization of Chile saltpetre or by synthesis.
5. There are certain reactions, however, in which oxidation can be successfully applied to the synthesis of acids.
