I have discussed complete guess of long questions form 9th class chemistry. Notes of other classes are also available #competitive chemistry exams. Easy teaching method. After learning the above questions students of 9th grade chemistry will be able to learn chemistry. I have done my M.phil chemistry from Punjab university Lahore. Here I will discuss every Chemistry topic related to thier syllabus. Feel free to contact me on my Gmail rashidahnd786@gmail.com. I am silver medalist in M.phil physical chemistry. I will try my best to convey material regarding chemistry.

1. LONG QUESTIONS
Full book 9th chemistry
GUESS

2. Pairing of chapters
1 & 2
4 & 5
7 & 8

3. Like share & Comment
•Subscribe our channel
Keep watching
explore chemistry to
get help in chemistry

4. Chapter 1
Define following branches of chemistry
a) Physical b) Organic c) Inorganic d) Biochemistry e) Environmental
e) Nuclear
 Define industrial chemistry and analytical chemistry
 What is mixture. Define its types and gives examples? OR Write five
differences between compound & mixture? OR Write any five properties of
mixture
State steps for writing a chemical formula?

5.  Define atomic number and mass number with examples?
 What is a molecule. Write a detail note on kinds of molecule?
 Write down differences between molecule & molecular ion?
 Explain molecular formula and empirical formula? Explain their relationship with
the help of examples?
Define ion. Write its two types with examples? / Write down three difference b/w
atom and ion?
The number of CO2 molecule in a pot are 3.01* 1023. Calculate its moles & mass?

6. Chapter 2
 Write down important postulates of Bohr’s atomic model?
 What is difference b/w Rutherford’s and Bohr’s atomic model?
 Describe Rutherford’s atomic model. Also point out defects in this model?
 How neutron was discovered? Write down its properties ?
 State any four properties of canal rays?
 How cathode rays are produced? Write down properties of cathode rays?

7.  Write down any five results of Rutherford’s atomic model experiment?
 Write uses of isotopes?
 Define isotopes. Describe the isotopes of Hydrogen with diagram?
 Give the application of isotopes in the field of radiotherapy &
medicine.
What is meant by electronic configuration? What are basic requirements
while writing electronic configuration of elements ?

8. Chapter 4
 What is ionic bond? Discuss the formation of ionic bond between Sodium
and Chlorine atoms?
 Explain polar & non-polar covalent bond with example?
 Define hydrogen bonding and explain how do these forces affect the
physical properties of compounds?
 How a coordinate covalent bond is formed? Explain with examples?
 Explain metallic bond with its diagram?

9.  Define covalent bond. Explain the types of covalent bond with examples?
 Define ionic compound. Write its properties?
 Define covalent compound. Write its properties?
 What is dipole-dipole interaction? Explain with example of HCl?
 Write down five properties of metals?

10. Chapter 5
 Define and explain Charles law of gases?
 Define and explain Boyle’s law?
 Define evaporation. How it is affected by different factors?
 Define diffusion and describe the factors which influence the diffusion of
liquid?
 Define vapour pressure. Explain the factor which affect vapour pressure?

11. Differentiate between crystalline & amorphous solids?
What is allotropy? What are its reasons? Explain transition temperature also?
 Describe any four typical properties of gases?
 Give any four characteristics of suspension?
 Give any four characteristics of colloids?
 Define solubility? What is general principle of solubility explain it ?

12. Chapter 7
• Define oxidation state and write rules for assigning oxidation state?
• What is electrolyte and give it’s types?
• Define electrolysis and explain the electrolysis of water with diagram?
• Discuss working of a Daniel cell with an example?
• Differentiate b/w electrolytic cell & Galvanic cell?
• Define electrolytic cell and describe it’s working?

13. • How NaOH is manufactured from brine? Explain?
• Discuss reodx reaction taking place in rusting of iron in detail?
• Define corrosion. Write methods which are used to prevent metals from
corrosion?
• Explain physical methods of metallic coating?
• What is principle of electroplating? How is electroplating of chromium
carried out ?

14. • What is electroplating? How electroplating of silver is carried out ?
• Write down a note on electrolytic refining of Copper?

15. Chapter 8
• Compare and contrast the properties of alkali and alkaline earth metals?
• Define non-metals? State physical properties of non-metals ?
• Write four uses of magnesium?
• Describe four important chemical properties of metals?
• Write four uses of platinum?
• Describe the trend of electro positivity in groups and periods?

16. • Define metals. Also write physical properties of metals?
• Write down reaction of halogens with a) Hydrogen. b) water
• Describe oxidizing properties of halogens?

17. Thank you