Aldehyde ketones and acid class 12th CBSE

The chemistry chapter on aldehydes, ketones, and carboxylic acids is all about organic compounds that contain a carbonyl group (C=O). This group is special because it's polar, meaning it has a slightly positive end and a slightly negative end. This polarity makes these compounds reactive and leads to a variety of interesting chemical properties. Aldehydes * Contain a carbonyl group with at least one hydrogen atom attached to it. * Have the general formula R-CHO, where R is any alkyl or aryl group. * Are named by replacing the "-e" ending of the parent alkane with "-al". * Examples include formaldehyde (CH2O), acetaldehyde (CH3CHO), and benzaldehyde (C6H5CHO). Ketones * Contain a carbonyl group with two alkyl or aryl groups attached to it. * Have the general formula R-CO-R', where R and R' are any alkyl or aryl groups. * Are named by replacing the "-e" ending of the parent alkane with "-one". * Examples include acetone (CH3COCH3), butanone (CH3CH2COCH3), and acetophenone (C6H5COCH3). Carboxylic acids * Contain a carboxyl group (-COOH), which is a carbonyl group with a hydroxyl group (-OH) attached to it. * Have the general formula R-COOH, where R is any alkyl or aryl group. * Are named by replacing the "-e" ending of the parent alkane with "-oic acid". * Examples include formic acid (HCOOH), acetic acid (CH3COOH), and benzoic acid (C6H5COOH). Properties * Aldehydes and ketones are polar molecules, so they have higher boiling points than nonpolar molecules of similar size. * Aldehydes are more reactive than ketones because they have a less sterically hindered carbonyl group. * Carboxylic acids are also polar molecules and can form hydrogen bonds with each other, so they have even higher boiling points than aldehydes and ketones. * Carboxylic acids are weak acids, meaning they only partially dissociate in water to form H+ ions and carboxylate ions (R-COO-). Reactions * Aldehydes and ketones undergo nucleophilic addition reactions, where a nucleophile (a molecule with a negative charge or a lone pair of electrons) attacks the carbonyl carbon. * Carboxylic acids undergo a variety of reactions, including neutralization reactions with bases, esterification reactions with alcohols, and reduction reactions with reducing agents. Uses * Aldehydes and ketones are used in a variety of applications, such as the production of polymers, resins, and solvents. * Carboxylic acids are used in the production of soaps, detergents, and plastics. * Many aldehydes, ketones, and carboxylic acids are also found in nature, such as in fruits, vegetables, and perfumes. I hope this helps! Let me know if you have any other questions.