Alpha hydrogens, enolisable positions and haloform test on drawn compounds

14 questions on Alpha hydrogens, enolisable positions and haloform test on drawn compounds from the Aldehydes, Ketones and Carboxylic Acids chapter: 3 NEET level, 7 JEE Main, 4 JEE Advanced. Each one opens with its answer and solution.

• How many alpha-hydrogens (H on carbons directly bonded to the carbonyl carbon) does the ketone shown have? NEET level, drawn structure
• The compound shown is warmed with iodine and aqueous NaOH. What is observed? NEET level, drawn structure
• The ketone shown is heated with excess iodine in aqueous NaOH and the mixture is then acidified. Which structure is the organic acid obtained? NEET level, drawn structure
• The aldehyde shown is warmed with iodine and aqueous NaOH. Which pair of products is formed? JEE Main level, drawn structure
• The number of different enol forms (constitutional isomers, ignoring E/Z) that the ketone shown can give is JEE Main level, drawn structure
• The ketone shown has how many alpha-hydrogens in total (hydrogens on the two carbons bonded to the carbonyl carbon)? Give the answer as an integer. JEE Main level, drawn structure
• The ketone shown is treated with one equivalent of LDA in THF at -78 degC (kinetic control) and the enolate is then quenched with CH3I. Which structure is the m... JEE Main level, drawn structure
• The ketone shown is heated with excess NaOBr (from Br2/NaOH) and then acidified. Which structure is the organic acid obtained? JEE Main level, drawn structure
• Assume each iodination step consumes one NaOI and the oxidation step consumes one NaOI, and that each NaOI is made from one I2 (I2 + 2NaOH -> NaOI + NaI + H2O).... JEE Advanced level, drawn structure
• The alcohol shown is warmed with excess iodine and NaOH and the mixture is then acidified. Which structure is the organic acid formed? JEE Main level, drawn structure
• The ketone shown is considered. Which statements are correct? JEE Advanced level, drawn structure
• The ketone shown is heated with excess iodine in aqueous NaOH, acidified, the acid is converted with SOCl2 and the product is then treated with excess NH3. Whic... JEE Advanced level, drawn structure
• The ketone shown is converted to its silyl enol ether under thermodynamic (equilibrating) conditions: Et3N, Me3SiCl, DMF, heat. Which structure is the major sil... JEE Advanced level, drawn structure
• The ketone shown is stirred with excess D2O containing a catalytic amount of NaOD until no further exchange occurs. How many hydrogen atoms per molecule are rep... JEE Main level, drawn structure