19- This reaction is OMe a- Cannizzaro Reaction b- Fridal craft - Wolf-Kishner d

Question

19- This reaction is OMe a- Cannizzaro Reaction b- Fridal craft - Wolf-Kishner d-Witting reaction 20- Identify the directing effect of the ring substituent in the following reaction CH2CH CH3 NO2 o m, actvating o, activating ()m-, deactivating (Dop, deactivating 21- Find out the antiaromatic structure among the cempounds prsented belows c) d) e) a- ring a b ring b cring c d-ring d e-ring e 22-Ozonolysis of alkenes yields a-ketones if one of the unsaturated carbon atoms is disubstituted balcohol c- carboxylic acid d- alkane 23-Which of the following heterocycles is not aromatic? 3 4 a. I c. 2

Explanation / Answer

19. Option A, Cannizaro reaction a redox reaction

20. OPTION B, Alkyl groups are o, p- activating groups

21. OPTION C, if it has positive charge, a/c to 4n pi electrons anti aromatic(it is not visible clearly).

22. Option A, ozonolysis of alkenes gives carbonyl compounds (either aldehyde or ketone based on olefinic substitution)

23. Option D, compound 3

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