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Introduction to Chemical Bonding and Fazan's Rule( in Hindi)
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Chemical bonding is one of the most important topics for your whole 11th and 12th chemistry course. This will be the basis for many of the other chapters of chemistry. In this lesson we will study about types of bond i.e. ionic bond , covalent bond, co-ordinate covalent bond and one very important rule i.e.FAZAN'S RULE.

Ravi Prakash is teaching live on Unacademy Plus

Ravi Prakash
Passionate about chemistry learning and teaching! studying mechanical engineering from NIT ROURKELA Here to help you out. Feel free to ask!

U
Unacademy user
sir does ur lectures cover the total syllabus of NEET!?? should I need to refer any other book for theory part!???
Riya Rastogi
a month ago
Hey follow Narayani Saha ma'am she started this chapter and she merged Allen notes, ncert and Allen module in this topic.
sir in 2nd que ans will be what will be the answer
sir I didn't understood question number 4 sir please explain. I am not getting that question..
Sir can you plz explain?? Question number 4....
Ravi Prakash
8 months ago
In that one should be hg2cl2
Puja Prit
8 months ago
Can u plz explain??
Mahtab Midday
6 months ago
can you please explain this..
complete kr dijiye VWF,Ionic,Mettalic,Thermal sability,Solubility,H-bond.plz plz plz
  1. CHEMICAL BONDING


  2. TOPICS TO BE COVERED: - lonic bond and Favourable condition for ionic bond formation. Covalent bond Co-ordinate covalent bond Fazan's rule-VVI


  3. ONIC BOND - In an ionic bond, the bond formation results due to the electrostatic between oppositely charged ions. It occurs due to the transfer of electrons from cations to anions. -Eg: Na Cl CI A sodium atom A chloride atom A chloride anion A sodium cation NaCI NatCI


  4. FAVOURABLE CONDITION FOR IONIC BOND FORMATION . 1) Less AH (i.e) of metal. 2)more E.A. of non-metal. 3)more E.N. difference between metal and non-metal. 4)Large lattice enthalpy. LATTICE ENTHALPY:- Energy required to break a lattice of solid to convert it into isolated gaseous ions is called lattice enthalpy.


  5. COVALENT BOND - In covalent bonding bond is formed due to mutual sharing of electrons between 2 atoms. Non metal + non metal generally covalent bond formation takes place.


  6. CO-ORDINATE COVALENT BOND - It is also known as DATIVE BOND It occurs when shared pair of electron is provided by single atom, then it is called a co-ordinate covalent bond.


  7. FAZAN'S RULE - Smaller the size of cation and larger the size of anion greater is the polarization and hence the covalent character. - Greater the charge difference between cation and anion, greater is the polarization and hence the covalent character. GAT HASH CATION WITH PSEUDO INERT GAS CONFIGURATION HAS HIGHER POLARI ATIN TEIN CA POLARIZATION THEN CATION WITH NORMAL GAS CONFIGURATION POLARIZATION- Deformation of electron cloud of an anion towards cation is called polarization which leads to development of covalent character in ionic bond.


  8. 1 > APPLICATION OF FAZAN'S RULE COVALENT CHARACTER POLARISATION IONIC CHARACTER1/POLARISATION -MELTING POINT, BOILING POINT / POLARIZATION SOLUBILITY IN POLAR SOLVENT 1/POLARISATION oo -SOLUBILITY IN NON POLAR SOLVENT oo POLARIZATION


  9. PRACTICE PROBLEMS ON FAZAN'S RULE ARRANGE THE FOLLOWING-> 1. NaCi, MgCi, AICI, SiCl4 (COVALENT CHARACTER) 2. SnCl2 SnCl4, PCI4 (COVALENT CHARACTER) 3. FeCl2, FeCl3 (IONIC CHARACTER) 4. HgCl2 , HgCh (COVALENT CHARACTER)


  10. 5. NaCI, CuCI (MELTING POINT) 6. Li2Co3, Na2Co3, K2Co3 (THERMAL STABILITY) 7. L F, L CI , LiBr, Lil (SOLUBILITY IN BENZENE)