CHAPTER 7- CHEMICAL BONDING

by • 14/07/2011 • 9th class ChemistryComments (6)1261

Q1) Explain ionic bond and covalent bound with any one example?
Ans: Ionic bond:- It is a bond formed by the complete transfer of electrons from one atom to the other atom.
the atom which lose electron acquire positive charge and the one which again which acquire negative charge. for example 1
Consider the formation of NaCl:- In formation of NaCL molecules one electron is transferred from an atom to CL atom their by the octet of each atom is completed.
Covalent bond :-It is the bond formed by the mutal sharing of electron between the tow bonded atoms. example.
Formation of molecule:-Considered two hydrogen atoms. each has one electron in its outer most shell. thus the two atoms contribute there two electron to form a shared pair electron. the pair of shared electron is known as covalent bond. it is donated by H-H.

 

Q2) Describe the types of covalent bond?
Ans: Types of covalent bonds
Single covalent bond:-A covalent bond formed by the  mutual sharing of one electron pair is called a covalent and is denoted by single short straight line.

For example in H-Cl, H-H etc
Double covalent bond:-A covalent bond formed by sharing of two electron pair  is denoted by two short  line. for example in O2, C2 etc
Triple covalent bond:-A three electron pair bond is called a triple covalent bond and is donated by three short line. In nitrogen there is a triple covalent bond.

 

Q3) Differentiate between ionic and covalent bond?
Ans:                      Ionic bond Covalent bond

1: It is formed by the complete transfer of electron. 1: It is formed by the mutual sharing of electron.
2: In this bond one atom acquire negative charge. 2: No charges are developed on the two bonded atoms.
3: Ionic bond are strong. 3: Covalent bond are weak.

 

 

 

 

Q4)  Differentiate between ionic and covalent compound?

Ans:                 Ionic compound Covalent compound

1: Ionic compound do not contain molecules. 1: Covalent compound contain molecules.
2: Ionic compound are mostly inorganic compound. 2: Covalent compound are mostly organic compound.
3: They are usually soluble in water. 3:They are usually insoluble in water.
4: They can conduct electricity. 4: They cannot conduct electricity.
5: They are non volatile in nature. 5: They are volatile in nature.

Q5) What is chemical bond ?
Ans: Chemical bond: The attractive force which bonds atoms together is called chemical bond.
Formation of chemical bond: When element react to from a compound, the chemical bond are formed between atom. all chemical bond between atoms are formed by utilizing the electron of outer most shell generally the atoms combine with are another in there way.

1) By using electron.
2)By gaining the electron.
3)By sharing the electron.
When the compound undergoes chemical reaction the bond b/w the atoms are rearranged.

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6 Responses to CHAPTER 7- CHEMICAL BONDING

  1. kumail abbas says:

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  2. iqra ashraf says:

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  3. BABAR says:

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  5. Sabih443@yahoo.com says:

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  6. sana says:

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