KPK 9th Class Chemistry Chapter 4 Structure of Molecules Short Questions Answers
KPK 9th Class Chemistry Chapter 4 Structure of Molecules Short Questions with answers are combined for all 9th class(Matric/ssc) Level students.Here You can prepare all Chemistry Chapter 4 Structure of Molecules short question in unique way and also attempt quiz related to this chapter.Just Click on Short Question and below Answer automatically shown. After each question you can give like/dislike to tell other students how its useful for each.
Class/Subject: 9th Class Chemistry
Chapter Name: Structure of Molecules
Board: All KPK Boards
- Malakand Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
- Mardan Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
- Peshawar Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
- Swat Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
- Dera Ismail Khan Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
- Kohat Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
- Abbottabad Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
- Bannu Board 9th Class Chemistry Chapter 4 Structure of Molecules short questions Answer
Helpful For:
- All KPK Boards 9th Class Chemistry Annual Examination
- Schools 9th Class Chemistry December Test
- KPK 9th Class Chemistry Test
- Entry Test questions related Chemistry
KPK 9th Class Chemistry Chapter 4 Structure of Molecules Short Questions Answers
What is electron sea model of metallic bonding?
Metals have totally different bonding nature.
Metallic bond was explained by Loren in 1923 by proposing a theory called electron gas theory.
According to this theory each atom of metal losses its valence electrons because of its large size.
These electrons form a pool or a gas that behaves like a glue to bind the positively charged metallic ions.
This force which binds the metallic atoms is called metallic bond.
Why most are chemically bonded to other atoms in nature?
Atoms of various elements form chemical bonds, in order to get stability by completing their octet (8 ens) in valance shells or duplet (2ens).
Examples
Hydrogen, H2 Hydrogen atoms can from one covalent bond. One pair of electrons is shared in a hydrogen molecule (H2)
Chlorine, Cl2: Chlorine atoms can form one covalent bond. One pair of electrons is shared in a chlorine molecule (Cl2).
Arrange the following from strongest toweakest attraction.
a) Covalent Bond B) Dipole – Dipole interaction
c) Hydrogen bond d) Lonic bond
a) Covalent Bond B) Dipole – Dipole interaction
c) Hydrogen bond d) Lonic bond
The arrangement of given attractive force w.r.t their increasing order is listed below.
Lonic bond > Covalent bond > Hydrogen bond > Dipole – Dipole interaction.
Ionic compounds are good conductor in molton and solution state but non – conductor in solid state?
Ionic compounds conduct electricity in solution and molten state. It is because in solution and molten state they have free ens. But in solid state they have no free electrons, so non conductor.
What type of elements /atoms tend to from following bonds.
a) ionic bond b) Covalent bond c) metallic bond
The existence of above bonds take part as;
Ionic bond
It exist between metals & non-metals. e.g Na-CI
Covalent bond
It exist between non-metals & non-metals.e.g H-CI
Metallic bond
It exist between atoms of same. Fe-Fe
Give an example of a non-polar molecule with polar bonds.
CCl4 is a non-polar molecule with polar bonds, as shown below.
Why ionic compounds are goog conductor as compared to covalent compounds?
Ionic compounds conduct electricity in solution and molten state. It is because in solution and molten state they have freenens. But covalent compounds are generally non-electrolytes. So produce no free electrons. Thus non-conductors.
Give the reason that why dative bond is always polar?
Co-ordinate covalent bond (dative bond) is always polar because only one atom supplied both shared pair electron due to which partial positive charge appears on donar and partial negative charge on acceptor.
