Revision Notes for CBSE Class 11 Chemistry Chapter 12 (Organic Chemistry-Some Basic Principles & Techniques) - Free PDF Download





















FAQs on Organic Chemistry - Some Basic Principles and Techniques Class 11 Notes CBSE Chemistry Chapter 12 (Free PDF Download)
1. Why are the notes of ch 12 chemistry Class 11 important?
Chapter 12 Class 11 chemistry notes are important from the point of revision. They will be very helpful in quick revision and will save you time and atz the same time will add perfect value to your learning. Class 11 chemistry notes Chapter 12 explains the basics of organic chemistry which will clear your concepts regarding organic chemistry and help you understand further chapters like hydrocarbons, alcohols, alkyl and aryl halides, ethers, etc.
2. In the chemistry Class 11 Chapter 12 notes explain what do you understand by the term conjugated system?
The concept of a conjugated system as explained in Class 11th Chemistry Chapter 12 notes is very important. A conjugated system means a system of p orbitals connected having a delocalized electron molecule. It is represented by alternating single and double bonds.
3. What is the difference between distillation, distillation under reduced pressure and steam distillation?
Distillation is useful with volatile liquids mixed with a non-volatile impurity.
Distillation under reduced pressure is usually used for the purification system of liquids that have very high boiling points or may disintegrate at or below their boiling points.
Steam distillation purifies steam volatile liquids mixed with impurities immiscible in water. Vedantu offers detailed solutions to Chapter 12 Chemistry 11 for free of cost on the Vedantu website and on the Vedantu app.
4. Differentiate between the principle of estimation of nitrogen in an organic compound by (i) Dumas method (ii) Kjeldahl’s method?
Dumas Method: an organic compound is strongly heated with the surplus of CuO (Cupric Oxide) in an atmosphere of CO2 when free nitrogen, carbon dioxide and water are obtained.
Kjeldahl’s Method: A known mass of an organic compound is strongly heated with a cone. H2SO4, a little potassium sulphate and little mercury (a catalyst). After the reaction, the nitrogen in the compound turns into ammonium sulphate.
5. Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens?
Organic compounds have to be fused with the metal sodium in order to convert them into Na2S, NaCN, NaX and Na3PO4. Because these are ionic compounds, they become more reactive and thus can be easily tested using suitable reagents.
6. Why is an organic compound fused with Sodium for testing nitrogen, halogens and sulphur?
When an organic compound is fused with the metal sodium the elements present in your organic compound get converted to sodium salts. These salts are soluble in water and may be filtered and detected through the respective tests. Vedantu offers detailed solutions to Chapter 12 Chemistry 11.
7. Explain the hyperconjugation effect. How does the hyperconjugation effect explain the stability of alkenes?
The relative stability of various classes of carbonium ions can be explained with the no-bond resonance structures which may be written for them. The manner of releasing electrons with no bond character to the subsequent C-H bond is known as Hyperconjugation. With greater hyperconjugation, the stability of alkenes will also be greater.