Ncert Solutions Chemistry Class 12th

S₃O₉ has no

S - S linkage

Process of active methylene group  acidic strength and the side chain should be e^- withdrawing.

Neighboring group participation by a sulphide involved.

Biomolecules in class 12 Chemistry include the following important topics: classification and structure of carbohydrates, amino acids, and proteins, enzymes and their characteristics, nucleic acids (DNA and RNA structure and components), and vitamins.

You must also prepare the following topics that are frequently asked in exams: zwitterion structure in amino acids, enzyme action mechanisms, and differences between DNA and RNA.

Biomolecules are organic compounds essential for life; they are found in all living organisms. In chemistry class 12, we talked about the following biomolecules: carbohydrates, proteins, lipids, nucleic acids, enzymes, and vitamins. 

Biomolecules chemistry class 12 connects biology and chemistry and helps us understand metabolism, heredity, and biochemical reactions. 

Nitrogen, sulphur and halogens are tested in an organic compound by lassaigne's test.
The organic compound is fused with sodium metal as to convert these elements into ionisable inorganic substances.
Na + C + N → NaCN
2Na + S → Na? S
2Na + X? → 2NaX
The cyanide, sulphide or halide ions can be confirmed in aqueous solution by usual test.

4-ethoxycarbonylpent-3-enoic acid

In S?2 reaction, inversion takes place, so configuration get reversed.