Chemistry XII Unit 8 Questions: 48 Time Limit: 48 minutes Passing Score: 60% Start Quiz Chemistry XII Unit 8 Question 1 of 48 What is functional group of aldehydes? Hydroxyl group Carbonyl group -CHO at terminal position Ketonic group Carboxyl group What is functional group of ketones? Hydroxyl group Carbonyl group C=O within carbon chain Aldehydic group Amino group What is IUPAC name of HCHO? Formaldehyde Methanal Formic aldehyde Methyl aldehyde What is IUPAC name of CH3CHO? Acetaldehyde Ethanal Methyl aldehyde Acetic aldehyde What is IUPAC name of CH3COCH3? Dimethyl ketone Propanone or acetone Methyl ketone Ketone What is IUPAC name of CH3COCH2CH3? Methyl ethyl ketone Butanone Ethyl methyl ketone 2-Butanone What is functional group of carboxylic acids? Hydroxyl group Carbonyl group Carboxyl group -COOH Amino group What is IUPAC name of HCOOH? Formic acid Methanoic acid Acetic acid Ethanoic acid What is IUPAC name of CH3COOH? Acetic acid Ethanoic acid Methanoic acid Propanoic acid What is IUPAC name of benzoic acid? Benzenecarboxylic acid Phenylmethanoic acid Both 1 and 2 Phenolic acid How are aldehydes prepared from primary alcohols? Reduction Oxidation using PCC or CrO3 Hydration Substitution How are ketones prepared from secondary alcohols? Reduction Oxidation using K2Cr2O7 or KMnO4 Hydration Elimination What is Etard reaction? Oxidation of toluene to benzaldehyde using CrO2Cl2 Reduction Hydration Substitution What is Gattermann-Koch reaction? Formylation of benzene using CO and HCl with AlCl3/CuCl Oxidation Reduction Nitration How are carboxylic acids prepared from primary alcohols? Reduction Strong oxidation using KMnO4 or K2Cr2O7 Mild oxidation Substitution How are carboxylic acids prepared from alkylbenzenes? Reduction Oxidation of side chain using KMnO4 Hydration Nitration How are carboxylic acids prepared from nitriles? Oxidation Hydrolysis using acid or base Reduction Substitution What is product when aldehyde is reduced? Ketone Primary alcohol Secondary alcohol Carboxylic acid What is product when ketone is reduced? Aldehyde Primary alcohol Secondary alcohol Tertiary alcohol What is test to distinguish aldehydes from ketones? Lucas test Tollen's test (silver mirror test) Iodoform test Both 2 and 3 What is Tollen's reagent? Ammoniacal AgNO3 solution Fehling's solution Benedict's solution FeCl3 What is product when aldehyde reacts with Tollen's reagent? Silver mirror and carboxylate ion No reaction Ketone Alcohol What is Fehling's test? Test using copper sulfate in alkaline medium Test using silver nitrate Test using ferric chloride Test using iodine What happens when aldehyde or ketone reacts with HCN? Forms cyanohydrin Forms alcohol Forms acid No reaction What is aldol condensation? Reaction of two aldehyde or ketone molecules in presence of dilute base Oxidation Reduction Substitution What is required for aldol condensation? Alpha hydrogen atoms No hydrogen atoms Only aromatic ring Beta hydrogen What is Cannizzaro reaction? Disproportionation of aldehydes without alpha hydrogen in strong base Oxidation Reduction Aldol condensation Which aldehydes undergo Cannizzaro reaction? Aldehydes with alpha hydrogen Aldehydes without alpha hydrogen like HCHO and C6H5CHO All aldehydes Ketones only What is product when HCHO undergoes Cannizzaro reaction? Methanol and sodium formate Ethanol Acetic acid Ketone What is product when aldehyde or ketone reacts with NH2OH? Oxime Hydrazone Semicarbazone Alcohol What is product when aldehyde or ketone reacts with NH2-NH2? Oxime Hydrazone Semicarbazone Alcohol What is product when aldehyde or ketone reacts with NH2-NH-CO-NH2? Oxime Hydrazone Semicarbazone Carbazone What is iodoform test? Test for methyl ketones or CH3CH(OH) using I2 and NaOH Test for aldehydes Test for acids Test for ethers Which compounds give positive iodoform test? All aldehydes Methyl ketones like CH3COCH3 and ethanol CH3CH2OH All ketones All alcohols What is product when carboxylic acid reacts with alcohol? Ester plus water Ether Aldehyde Ketone What is Fischer esterification? Esterification using acid catalyst Hydrolysis Oxidation Reduction What is product when carboxylic acid reacts with PCl5? Acyl chloride plus POCl3 plus HCl Alcohol Ester Ketone What is product when carboxylic acid reacts with SOCl2? Acyl chloride plus SO2 plus HCl Alcohol Ester Anhydride What is product when two molecules of carboxylic acid react with P2O5? Acid anhydride plus water Ester Acyl chloride Ketone Why are carboxylic acids acidic? Due to resonance stabilization of carboxylate anion Due to carbonyl group Due to hydroxyl group Due to carbon chain What is acidity order: formic acid vs acetic acid? HCOOH > CH3COOH CH3COOH > HCOOH Both equal Cannot compare What is effect of electron withdrawing groups on acidity of carboxylic acids? Decreases acidity No effect Increases acidity Makes neutral What is acidity order: ClCH2COOH vs CH3COOH? CH3COOH > ClCH2COOH ClCH2COOH > CH3COOH Both equal Cannot compare What is Hell-Volhard-Zelinsky reaction? Alpha halogenation of carboxylic acids using Cl2 or Br2 with red P Oxidation Reduction Esterification What is decarboxylation? Removal of CO2 from carboxylic acid Addition of CO2 Oxidation Reduction What is product when sodium salt of carboxylic acid is heated with soda lime? Alkane with one carbon less plus Na2CO3 Alcohol Aldehyde Ketone What is Kolbe's electrolysis? Electrolysis of sodium or potassium salt of carboxylic acid giving alkane Reduction Oxidation Esterification What is product at anode in Kolbe's electrolysis of sodium acetate? Ethane gas C2H6 Methane Propane Hydrogen Previous Next Submit Quiz Want to save your progress? 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