In the light of the above statements, choose the correct answer from the options given below :
- Statement I is true but Statement II is false
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is false but Statement II is true
Answer
(2) Both Statement I and Statement II are true
Solution
Statement I: X contains a –COOH group; carboxylic acids are stronger acids than carbonic acid, so X reacts with NaHCO3 (evolving CO2) and dissolves as its sodium salt.
Ring carbon bearing –COOH: attached to H, –COOH, the ring carbon bearing the aroyl group and a ring CH2 – four different groups chiral.
Ring carbon bearing the aroyl group (–COAr): attached to H, –COAr, the ring carbon bearing –COOH and a ring CH2 – four different groups chiral.
X has two chiral carbons. Statement I is true.
Statement II: Y is CH3-CH2-CH=C=O (ethylketene).
CH3 and CH2: four σ bonds each sp3 (two carbons)
=CH–: one double bond sp2 (one carbon)
=C=: two double bonds sp (one carbon)
Statement II is true.
Answer: (2)