NCERT Exemplar Class 12 Chemistry Chapter 12 Solutions: Aldehydes, Ketones and Carboxylic Acids

NCERT Exemplar Class 12 Chemistry Solutions Chapter 12: Aldehydes, Ketones, and Carboxylic Acids is an important study material for the students to revise the whole chapter easily. NCERT Exemplar Class 12 Chemistry solutions Chapter 12 gives you a deep understanding of the concepts of Aldehydes, ketones and, Carboxylic acids, etc. These NCERT Exemplar problems are organized in such a manner that gives you a perfect outlook of the whole chapter on solving it. As the questions are plotted as per your CBSE Class 12 syllabus.

Aldehydes, Ketones, and Carboxylic Acids contain 50 Exemplar problems, carved up into various sections which cover almost all the significant topics associated with this particular chapter. These sections are MCQs, SA, Match type, Assertion and Reason type, and long answer type questions, etc. These Exemplar problems will help you revise the different concepts of Aldehydes, Ketones, and Carboxylic acids that include Physical and Chemical properties involved, about their preparation methods, their uses, nomenclature, and so on.

Students, after completing their NCERT textbook often got overconfident. However, this sense of overconfidence may suffer them in their Board exams. Therefore, it is suggested to go through our NCERT Exemplar solutions to grab good command in each chapter. Instasolv provides extra questions that will help you get used to the overall concepts of Exemplar Chapter 12.

Important Topics for NCERT Exemplar Class 12 Chemistry Solutions Chapter 12: Aldehydes, Ketones, and Carboxylic Acids.

Well, you may be familiar with the fact that Aldehydes, Ketones, and Carboxylic acids have the utmost importance in chemistry. 

Let’s see their significance by having a look at some of the important concepts and definitions involved it

  •   Aldehydes-

Aldehydes are the type of organic compounds which contain a functional group (−CHO). The carbon-atom (doubly bonded) with the oxygen describes all the basic characteristics of almost all aldehydes, that is why they are also termed as carbonyl compounds.

Alcohol is a useful organic compound for the formation of aldehydes. When alcohol is dehydrated (removal of a hydrogen atom), the resulting organic compound is aldehydes (or carbonyl compounds).

Aldehydes also perform several chemical reactions including polymerization. It gives various types of so-called aldehyde polymers, in which Bakelite is used as plastics. Aldehydes are also used as solvents and act as intermediate in the production of some daily usage things like Dyes. Also, bring into play the formation of perfume ingredients, that is why it usually refers to a pleasant odour in organic compounds.

  •   Physical properties of aldehydes

Physical properties of aldehydes are as follows:

 Boiling point-  

As far as the boiling point of aldehydes is concerned, aldehydes have boiling points close to room temperature. Let us see an example through which we can conclude that.

Example- Well, you know that the boiling point of methanal is  -(19)- degree celsius whereas  +(21)- degree is the boiling point of ethanal which concludes that it is close to room’s temperature.

And, It is true in aldehydes that the increase in molecular weights will take the boiling point higher. Also, intermolecular forces help in increasing the boiling points.

  •   Vander Waals dispersion forces.
  •   Vander Waals dipole-dipole interaction forces.


The Solubility of aldehydes depends on the length of the chain. Higher in the length of chain, lesser will be the solubility of aldehydes in water.

Example- Methanal and Ethanal are soluble in water almost in all proportions.

  •     Ketones

Ketones are organic compounds which have a functional group RC(=O)R’, at which carbon atom is covalently bonded with oxygen and R and R’ can be a variety of substituents. The most common ketone among the other ketones is acetone (CH3C(O)CH3).

Ketones have a lot of significance in the medical field. Mostly they are seen in several sugars and in lots of different compounds that can be used for medical purposes. Not only in the medical field but also it is used for industrial purposes. Explosives, paints, and textiles are manufactured with the help of ketones. Also, in tanning and in hydraulic fluids.

  •     Carboxylic Acids

Carboxylic acids refer to those kinds of organic compounds that contain a carboxyl group  (R–COOH) at which carbon atom is covalently bonded with the oxygen atom, singly bonded with the hydroxyl group and singly bonded with the R ( substituent). Because it contains a carbonyl and hydroxyl group both that’s why they are named as carboxylic acids.

Carboxylic acids are well known for its acidity factor. These compounds are more acidic than other compounds. You might be familiar with the fact that proteins are the constituents of amino acids(that contains carboxylic acid).

Discussion of exercises of NCERT Exemplar Class 12 Chemistry Solutions Chapter 12

  • There are a total of 50 problems in the NCERT Exemplar book. The questions have been categorized into six sections – MCQs or multiple choice questions of type I and type II, short answer type questions, matching type questions, assertion and reasoning type questions, and long answer type questions
  • The 1st two sections are of MCQ type and it has two types: type 1 & type 2. MCQ type 1 consists of 12 Exemplar problems whereas type 2 contains 6 questions. MCQ type 1 at which you need to pick one correct choice among 4 options while in type 2, there may be more than 1 correct option, you need to choose them accordingly.
  • The next section has 19 NCERT Exemplar problems, and are of short answer type questions. These questions are generally based on concepts like boiling points, acidic nature, nomenclature, and chemical reactions.
  • The 4 matching type questions have to be solved by matching the item in column I to the items in column II.
  • The next section is the assertion and reason type. It has 5 NCERT Exemplar problems. In these types of questions, a statement of assertion followed by a statement of reason is given. You have to choose the appropriate reason.
  • The last section involves long answer type questions. These Exemplar problems can be tricky to solve. This section has 4 NCERT Exemplar problems at which you must have a deeper understanding of the concepts involved in this chapter.

Why use NCERT Exemplar Class 12 Chemistry Solutions Chapter 12 by Instasolv?

  • NCERT Exemplar Class 12 Chemistry Solutions Chapter 12 at Instasolv can be the right source of preparation for the students. 
  • The problems and their solutions are explained in a simple language, easy for you to understand. 
  • Our experts have worked and provided extra relevant questions which are important in your exam point of view.  
  • The NCERT Exemplar problems and solutions provided by Instasolv lets you do better time management in the stressful exam environment.