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MOST IMPORTANT LONG QUESTIONS
9TH CHEMISTRY
- Write Difference b/w Compound and mixture
- Write’Rutherford Atomic model + experiment + results +defects
- Describe four types of molecules with examples.
- Bohr's atomic theory in detail
- Write Characteristics of cathode and anode rays.
- Define electronic configuration. Draw electronic configuration of following elements: i)Nitrogen (ii) Oxygen (iii) Aluminium (iv) Phosphorus (v) Sulphur (vi)Sodium
- Elements + types + examples
- Define the following with examples: a)mole b)Molar mass c)Avogadro’s number
- discuss mole mas and mole particle calculation
- Draw electronic configuration of the following: )Na Mg Al Cl
- branches of chemistry
- how to write chemical formula + significance
- covalent bond + type + example
- Boyles + exp.verification
- ionic bond + steps to formation of NaCl
- evaporation + factors
- hydrogen bonding in details
- Charles law + exp.verification
- co-ordinate covalent bond in detail
- vapour pressure + factors
- intermolecular forces
- dipole-dipole interaction
- metallic bond
- polar / non polar covalent bond
- Write types of solids and their characteristics
- Discuss the following: a)Ionic and covalent compounds b) Allotropy and Transition temperature
- Write reaction of sodium with: (a)H2O (b)H2 (c) O2 (d) Cl2
- Discuss oxidation and reduction reactions Explain them in terms of loss and gain of electrons
- Write physical and chemical properties of metals
- What is the oxidation state or oxidation number? Write any four rules for assigning oxidation number
- Discuss electrolysis of water.
- Define corrosion. Discuss Rusting of iron in detail. Discuss the prevention of corrosion by physical methods.
- Discuss electrolytic refining of copper
- Explain the working of Daniel's cell
- Compare properties of alkali and alkaline earth metals also Write uses of metals.
- Discuss electroplating of silver and chromium.
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