9th Chem Notes.docx

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Define biochemistry? Define analytical and industrial chemistry. Define organic and inorganic chemistry. Define matter. define mole (avogadro’s number). Define molecular mass. Differentiate between atomic number and mass number. Define empirical formula. How cation is formed. What is gram formula. Differentiate between shell and sub shell. Where do electron proton and neutron reside in atom? Write any two properties of positive rays. (proton) Write down defects of Rutherford atomic model. What is carbon dating (radio dating). Define isotopes. Why does ice float on the surface of water? What is pressure? Why evaporation cause cooling. What is tyndall effect. Define ionization energy. Define atomic radius. Define chemical bond. Define inter molecular forces. Define diffusion and effusion. what do you mean by volume/volume%? Write name two by products of down cell. How electro plating of tin on steel is carried out. Why solution and suspension do not show tyndall effect? Name Nobel gasses. Define hydrogen bonding Write drawback of newland’s triads. What is shielding effect? What is meant by octet and duplet rule? Define electron affinity? Define polar and nonpolar bond? Define solute and solvent Define solubility? Define molarity. Define solution. Define electro chemistry. Define electrolyte. Explain two rules for assigning oxidation number. What is ment by electrolysis. Differentiate between crystalline and amorphous solids.

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Why O2 is necessary for rusting. Write three postulates of bohar’s atomic model. Define Charles law. Define boyle’s law. Ionic compounds are solids justify Define oxidation and give example. Define reduction and give example. Differentiate between corrosion and rusting. Define strong and weak electrolyte. Define redox reaction. Name four radio isotopes used in treatment of diseases. Define element. Define vapor pressure. Write uses of magnesium.