Self evaluation test on ALDEHYDES & KETONES with answers, Exercises of Organic Chemistry

Download Self evaluation test on ALDEHYDES & KETONES with answers and more Exercises Organic Chemistry in PDF only on Docsity! Aldehydes and Ketones 1303 1. Benzophenone can be converted into benzene using [Tamil Nadu CET 2001] (a) Fused alkali (b) Anhydrous 3AlCl (c) Sodium amalgam in water (d) Acidified dichromate 2. The reagent(s) which can be used to distinguish acetophenone from benzophenone is (are) [CBSE PMT 1990] (a) 2, 4-dinitrophenyl hydrazine (b) Aqueous solution of 3NaHSO (c) Benedict reagent (d) 2I and 32CONa 3. When acetaldehyde is heated with Fehling solution, it gives a red precipitate of [MP PET 1989, 93; IIT 1982; MP PET/PMT 1998; RPMT 2002] (a) Cu (b) CuO (c) OCu 2 (d) 2)(OHCu 4. The general order of reactivity of carbonyl compounds for nucleophilic addition reactions is[CBSE PMT 1995] (a) OCArOCRArCHORCHOOCH  222 (b) OCHOCRRCHOOCArArCHO  222 (c) OCHRCHOArCHOOCROCAr  222 (d) ArCHORCHOOCArOCROCH  222 5. Which of the following gives an alcohol and salt of carboxylic acid when reacted with conc. NaOH [MP PMT 1999] (a) CHOCH 3 (b) CHOHC 56 (c) 33COCHCH (d) 356 COCHHC 6. Which of the following compounds would undergo Cannizzaro's reaction [CPMT 1989; AFMC 1991; MNR 1995] (a) Propionaldehyde (b) Benzaldehyde (c) Bromobenzene (d) Acetaldehyde 7. HNaOH / reacts with [BHU 2003] (a) 356 OCHHC (b) OHCH 3 (c) 3 || 3 CH O CCH  (d) OHHC 52 8. The product of following reaction is /2   PtH O [Kerala CET 2000] (a) (b) (c) (d) 9. Which of the following aldehydes is most reactive towards nucleophilic addition reactions [Roorkee 1992; RPMT 1997] (a) HCHO (b) CHOCH3 (c) CHOHC 52 (d) 33COCHCH 10. Which one of the following gives iodoform test [AIIMS 1996] (a) Formaldehyde (b) Ethyl alcohol (c) Benzyl alcohol (d) Benzaldehyde 11. The active ion in Tollen's reagent is (a) Cu (b)  23 )(NHCu (c) Ag (d)  23 )(NHAg 12. Among the following compounds, which will react with acetone to give a product containing  NC [IIT 1998] (a) 256 NHHC (b) NCH 33 )( (c) 5656 HNHCHC (d) 256 NHNHHC CH3 OH OH 3CH H OH 1304 Aldehydes and Ketones 13. Which of the following does not give yellow precipitate with 2I and NaOH [MP PET 1996] (a) OHHC 52 (b) CHOCH 3 (c) 33COCHCH (d) HCHO 14. In this reaction HCNCHOCH 3 COOHOHCHCH OHH CNOHCHCH )( / )( 33    an asymmetric centre is generated. The acid obtained would be [CBSE PMT 2003] (a) 20% D + 80% L-isomer (b) D-isomer (c) L-isomer (d) 50% D + 50% L-isomer 15. Aldehydes are produced in atmosphere by [NCERT 1982] (a) Oxidation of secondary alcohols (b) Reduction of alkenes (c) Reaction of oxygen atoms with hydrocarbons (d) Reaction of oxygen atoms with ozone 16. Which of the following compounds will give positive test with Tollen's reagent [CBSE PMT 1994; Kurukshetra CEE 1998; AFMC 2002] (a) Acetamide (b) Acetaldehyde (c) Acetic acid (d) Acetone 17. HClR O CArCl O CRArH   || acid Lewis || is an example of (a) Friedel-Craft's alkylation (b) Friedel-Craft's acylation (c) Cannizzaro reaction (d) Claisen condensation 18. Which of the following fails to answer the iodoform test. [CBSE PMT 1989] (a) Pentanone–1 (b) Pentanone–2 (c) Propanone–2 (d) Ethanol 19. The reagent used for the separation of acetaldehyde from acetophenone is [AIIMS 2004] (a) 4NaHSO (b) 256 NHNHHC (c) OHNH 2 (d) 2INaOH 