JEE MainChemistryGeneral Organic Chemistry
Given below are two statements: Statement I : 2 -Hydroxy- 3 -phenylpropanoic acid has a degree of unsaturation of 5 , contains exactly one chiral carbon atom, and dissolves in aqueous NaHCO₃ solution. Statement II : Penta- 2,3 -diene is a non-planar molecule containing exactly two sp^2 hybridized carbon atoms and one sp hybridized carbon atom. In the light of the above statements, choose the correct answer from the o
Options
- ABoth Statement I and Statement II are true
- BBoth Statement I and Statement II are false
- CStatement I is true but Statement II is false
- DStatement I is false but Statement II is true
Correct answer
A. Both Statement I and Statement II are true
Step-by-step solution
Statement I : The structure of 2 -hydroxy- 3 -phenylpropanoic acid is C₆H₅-CH₂-CH(OH)-COOH . Degree of unsaturation (DU) = 4 (for the phenyl ring) + 1 (for the C=O in - COOH ) = 5 . It contains exactly one chiral center at the C-2 position, which is attached to four different groups: - H , - OH , - COOH , and - CH₂C₆H₅ . Due to the presence of the - COOH group, it dissolves in aqueous NaHCO₃ with effervescence. Thus, Statement I is true. Statement II : The structure of penta- 2,3 -diene is CH₃-CH=C=CH-CH₃ . The cen