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Do you want 100% Marks with less
effort? Then prepare the YSA Guess. Especially
designed for Karachi Board of Secondary Education (New
Pattern).
GUESS
PAPERS IX CHEMISTRY
NEW
PATTERN
SECTION
"A"
Q.1. What is Chemistry? Define its any
three branches.
Q.2. What is ion and ionic compound? Write the electronic
configuration of sodium ion and chloride ion.
Q.3. Define
i. Ionization Potential
ii. Electro negativity
iii. Electron affinity
Q.4. Balance the following
MnO2 + HCl ------> MnCl2 + H2O + Cl2
BiCl3 + H2O ------> BiOCl + HCl
PbO + O2 ------> Pb3O4
Q.5. Define pH-. What is the pH of water, acidic medium and
basic medium?
Q.6. Define
i. Diffusion
ii. Brownian Movement
iii. Molar Mass
Q.7. What are the characteristics of Cathode Rays?
Q.8. State the Dobereiner's law of triads and Mendeleev's
Periodic Law?
Q.9. What is the difference between covalent bond and
coordinate covalent bond?
Q.10. Define
i. Electrolysis
ii. Non-Electrolytes
iii. Strong Electrolytes
Q.11. State Lewis concept of Acid and Bases and explain.
Q.12. What are Lanthanides and Actinides? To which of the
block s, p, d, or f these elements belong to?
Q.13. What is a chemical reaction? Define Hydrolysis,
Neutralization and Combustion?
Q.14. Calculate the number of moles in 600g of glucose
(C6H12O6)- [Atomic masses C=12, H=1, O=16]
Q.15. What is meant by the period and group in the periodic
table?
SECTION
"B"
Q.16. State the law of Constant
composition and explain.
Q.17. Define the following
i. Ampere
ii. Faraday
iii. Coulomb
iv. Mohr's Salt
v. Potash alum
Q.18. Define Endothermic and Exothermic reactions with
example.
Q.19. Define the working of lead-storage battery.
Q.20. A hydrocarbon contain 5 carbon atoms. Write molecular
formula of its alkane, alkene and alkyne.
Q.21. What is the Frasch process for the extraction of
sulphur?
Q.22. Write the chemical formula:
i. Chrome alum
ii. Acetic acid
iii. Carnalite
iv. Potash alum
Q.23. Write two causes of food spoilage and its prevention.
Q.24. Write the difference between solution and suspension?
Q.25. Define:
i. Intra molecular forces
ii. Inter molecular forces
iii. London Forces
iv. Dipole - Dipole forces
Q.26. With the help of labeled diagram
explain the construction and working of a dry cell.
Q.27. State and explain Faraday's Second Law of
electrolysis?
Q.28. What is meant by Radioactivity? Draw a labeled diagram
showing the separation of α,β, and γ rays and
also explain the properties of these rays?
Q.29. Define ink, its types and preparation.
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