CBSE Class 12 Aldehydes, Ketones and Carboxylic Acids — practice questions
40 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Aldehydes, Ketones and Carboxylic Acids in the app →Aldehydes are generally more reactive than ketones in nucleophilic addition because:Tollens' reagent gives a silver mirror with:Carboxylic acids are more acidic than alcohols because:Among acetic acid, chloroacetic acid, dichloroacetic acid, trichloroacetic acid, the strongest acid is:The IUPAC name of the simplest aldehyde, $\mathrm{HCHO}$, isThe carbonyl carbon in an aldehyde or ketone isThe carbonyl group $\mathrm{C{=}O}$ is highly POLAR, with the oxygen bearing a partial negative charge and theWhich of the following BEST distinguishes an aldehyde from a ketone in the lab?ROSENMUND REDUCTION is used to prepare an aldehyde from an acyl chloride. The reagents and key feature of the Acetone ($\mathrm{CH_3COCH_3}$) reacts with HCN to give a product. Which is the correct product?Which of these aldehydes will UNDERGO the Cannizzaro reaction (disproportionation under concentrated NaOH)?In the ALDOL CONDENSATION, two carbonyl compounds (containing $\alpha$-hydrogens) react in the presence of a bThe acidity ($K_a$) order for the carboxylic acids $\mathrm{HCOOH}$ (formic), $\mathrm{CH_3COOH}$ (acetic), anWhich compound will give a POSITIVE IODOFORM test (yellow $\mathrm{CHI_3}$ precipitate with $\mathrm{I_2}$/NaODECARBOXYLATION refers to the loss of $\mathrm{CO_2}$ from a carboxylic acid (or its salt). When sodium acetatWhich carboxylic acid has the highest $K_a$ (i.e. is the most acidic)?The reaction of formaldehyde with concentrated NaOH is calledWhen acetic acid ($\mathrm{CH_3COOH}$) is treated with $\mathrm{LiAlH_4}$ followed by aqueous workup, the orgaThe carbon to oxygen double bond is called the:In an aldehyde the carbonyl carbon is bonded to carbon and:In a ketone the carbonyl group is bonded to:A carbonyl carbon carrying a hydroxyl group gives a:A carbonyl carbon attached to a halogen gives an:Esters and anhydrides are derivatives of:Vanillin, with its pleasant fragrance, comes from:Cinnamaldehyde is obtained from:Salicylaldehyde is obtained from:Acetone is manufactured mainly for use as a:The carbonyl carbon and its three attached atoms lie:The bond angles around a carbonyl carbon are about:The shape around the carbonyl group is described as:The carbon to oxygen double bond is polarised because oxygen is more:The carbonyl carbon behaves as a centre that is:At room temperature methanal exists as a:Aldehydes boil higher than hydrocarbons of like mass because of:Aldehydes boil lower than alcohols of like mass because they lack:Methanal, ethanal and propanone mix with water in:Solubility of aldehydes falls as the alkyl chain grows:Aldehydes and ketones take part in addition that is:Against ketones, aldehydes in nucleophilic addition are: