NEET Chemistry Aldehydes, Ketones & Carboxylic Acids Class 12 Questions

An organic compound (X) with molecular formula C₉H₁₀O gives positive 2,⁴⁻DNP and Tollens' tests. It undergoes Cannizzaro reaction and on vigorous oxidation it gives 1,⁴⁻benzenedicarboxylic acid. Compound (X) is

Assertion: Etard reaction helps to stop the oxidation of toluene at the aldehyde stage. Reason: Chromyl chloride oxidises methyl group to a chromium complex, which on hydrolysis gives corresponding benzaldehyde.

Given below are two statements : Statement-I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole-dipole interactions. Statement-II : The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H⁻bonding. In the light of the above statements, choose the most appropriate answer from the options given below:

What product is formed when acid chlorides are hydrolyzed with water?

What do acid chlorides yield upon hydrolysis with water?

What reaction do aldehydes undergo in the presence of concentrated alkali?

What type of reaction do aldehydes and ketones undergo due to the presence of the carbonyl functional group?

What type of reaction do aldehydes and ketones primarily undergo due to the presence of the carbonyl group?

What compound do aldehydes and ketones yield upon reaction with hydrogen cyanide (HCN)?

Which of the following aldehydes is also known as Ethanal?

What is the IUPAC name for the compound commonly known as acetaldehyde?

What is the IUPAC name of acetaldehyde?

What is the IUPAC naming convention for aldehydes?

Which of the following groups increases the acidity of carboxylic acids due to their direct attachment to the carboxyl group?

Which of the following acids has the lowest pK a value?

What is the result of the hydrolysis of an acid chloride with water?

What is produced when a nucleophile adds to the carbonyl carbon of aldehydes and ketones?

What is the primary nucleophile that adds to carbonyl compounds in the presence of a base, forming cyanohydrins?

Which of the following aldehydes is also known as ethanal?

What type of intermediate is formed during the nucleophilic addition reaction of aldehydes and ketones?

What is one method for preparing benzaldehyde from toluene?

What is the primary difference in the oxidation reactions of aldehydes and ketones?

Which reaction involves the reduction of nitriles to corresponding aldehydes?

Which of the following carboxylic acids has the lowest pK a value, indicating it is the strongest acid?

Which of the following carboxylic acids has the highest acidity based on its pK_a value?

What type of intermediate is formed during the nucleophilic addition of ammonia to aldehydes and ketones?

What type of intermediate is formed during the nucleophilic addition reactions of aldehydes and ketones?

Which of the following is a common name for the compound with the IUPAC name 'Methanal'?

Which of the following methods is a commercial method for the preparation of benzaldehyde?

What is the result of the hydration of ethyne in the presence of H2SO4 and HgSO4?

What is the product formed when ethyne is hydrated in the presence of H2SO4 and HgSO4?

Which of the following statements about the reactions of carboxylic acids is correct?

Which of the following statements about nucleophilic addition reactions of aldehydes and ketones is correct?

Which of the following statements about nucleophilic addition reactions of aldehydes and ketones is correct?

Which of the following statements regarding the preparation of aldehydes is correct?

Which of the following statements about the physical properties and reactions of aldehydes and ketones is correct?

Which of the following statements about aldehydes and ketones is correct?

Which of the following statements about nucleophilic addition reactions of aldehydes and ketones is correct?

Which of the following statements about the reactions of carboxylic acids is correct?

Which of the following statements about nucleophilic addition reactions of aldehydes and ketones is correct?

Which of the following statements about nucleophilic addition reactions of aldehydes and ketones is correct?

Which of the following statements about the preparation of aldehydes and ketones is correct?

Which of the following statements about the preparation of aldehydes and ketones is correct?

Which of the following statements about the reactions of carboxylic acids is correct?

Which of the following statements about nucleophilic addition reactions of aldehydes and ketones is correct?

Which of the following statements regarding the reactions of carboxylic acids is correct?

Which of the following statements about nucleophilic addition reactions of aldehydes and ketones is correct?

Which of the following statements about the preparation of aldehydes and ketones is correct?

Which of the following acids is the strongest based on their pKa values?

Which combination of statements correctly describes the preparation of aldehydes and ketones?