13. Some p-Block Elements - JEE Main - Core Points for Revision

Importance of  Core Revision Points: Core Revision Points are important because if you remember them strongly, many more points related to them will come out of your memory and help you to answer question and problems. Read them many times and make sure you remember them very strongly.


Sections in the Chapter

Elements Covered: Boron, Nitrogen, Carbon, Oxygen

Chemistry of Boron and Its compounds
13.1 Boron
13.2 Compounds of Boron

Chemistry of Carbon and its Compounds
13.3 Carbon
13.4 Compounds of Carbon

Chemistry of Nitrogen and its Compounds
13.5 Nitrogen
13.6 Compounds of Nitrogen

Chemistry of Oxygen and its Compounds
13.7 Oxygen
13.8 Simple Oxides
13.9 Ozone




Revision Points in the Chapter

Chemistry of Boron and Its compounds
13.1 Boron
13.2 Compounds of Boron

• Diborane (B2H6) is electron deficient compound.
• B3N3H6 os called inorganic benzene
• Boron halide acts as Lewis acid.
• Boric acid has BO3 (3-) ions.

Chemistry of Carbon and its Compounds
13.3 Carbon
13.4 Compounds of Carbon

• Allotropes are the different forms of the same element having different physical properties but almost similar chemical properties.
• In diamond, carbon undergoes sp3 hybridization while in graphite carbon undergoes sp2 hybridization.  
• Fullerenes are allotropes of Carbon.
• C60 is Buckminister fullerene. It is popularly called bucky ball.

Chemistry of Nitrogen and its Compounds
13.5 Nitrogen
13.6 Compounds of Nitrogen

• Calcium cyanamide is used as a fertilizer.
• N20 is called laughing gas.
• Brown ring test for nitrates.
• HN3 is called hydrazoic acid.
• HNO3 attacks proteins giving a yellow nitro compound called xantho protein.

Chemistry of Oxygen and its Compounds
13.7 Oxygen
13.8 Simple Oxides
13.9 Ozone

1. Liquid oxygen is used as rocket fuel.
2. Ozone is an allotropic form of oxygen.
3. On moving from left to right in a given period, the nature of oxide changes from basic to amphoteric and then to acidic.
4. On moving down the group, acidic character of oxides decreases.
5. When mercury reacts with ozone, it loses its meniscus and starts sticking to the side of the glass. This is known as tailing of mercury.

Updated on 31 December 2019
21 May 2015