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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?

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