Question

8. The interconversion of two constitutional isomers via the change in position of a lone pair and are bond is called 9. The enol form of carbonyl compounds make the a-carbon chemically behave as 10. The a-halogenation of aldehydes and ketones make their acarbon a(n) 11. Grignard reagents must be used in media strictly free of proton sources because they otherwise produce a 12. The Tollens reagent oxidizes aldehydes to carboxylic acids and its reduction product is 13. Catalytic hydrogenation of aldehydes and ketones is incompatible with the presence of 14. Reduction of aldehydes and ketones with hydride transfer reagents is compatible in the presence of faldehudos arvetnaerontrociconfa

Answer 1

Ams 8 This phenomena is called Resonance CHERCHE Amea) Ans.9) S OH OH C-H CH CH enal form &- Carbon shows - CH₂ - EH (Tautomerism) - Carbon acidic character wie it lose Ho jon. Ang. 10) CH₂ - CH Chalogen) & Presence of halogen ona-c makes the a-c more acidic , due to its - I effect. Ang. 11) of Grignard Reagents produce alkane in the presence moisture. x + HO - RH

Ang 12) CH₂ - E-H + [Ag (NH), 70 Aldehyde Tellen's Reagent OHO R-E-00 Agt (a filver mirror + ppt is NH₃ formed Ang 13) u Catalytic hydrogenation of aldehydes and ketones is in compatible with the presence of double bond. CHz - 18 _ (H = CH2 Helli che et = 15 Ang 14) Reduction of aldehyde and Ketones with hydride transfer reagent is compatible in the presence of double bond. 0 (i) Hably I CH₂-CH=CH-C-H (1) Ho CH-CH=CH-Chont 3 (60%) Cth-CH₂ - Cth Othon (40%)

Ans. 35) H-- (formeldelydt) Ang 36) (D) Protonation of the carbonylic acid make it a stronger electrophile and hence readily undergoes Nucleophilic attack.