Chemistry investigatory project class 12 - Saksham

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Chemistry Investigatory Project CBSE Class 12 2017-2018 Polymers Synthesis and Property Analysis Bakelite Polystyrene Epoxy Resin - Saksham Mittal

Physics Practical Record Class XII, Session 2019-20 List of Practicals:- Experiments(a) 1. To determine resistance per cm of a given wire by plotting a graph for potential difference versus current. 2. To find resistance of a given wire using metre bridge and hence determine the resistivity (specific resistance) of its material. 3. To verify the laws of combination (series) of resistances using a metre bridge. 4. To verify the laws of combination (parallel) of resistances using a metre bridge. 5. To compare the EMF of two given primary cells using potentiometer. 6. To determine the internal resistance of given primary cell using potentiometer. 7. To determine resistance of a galvanometer by half-deflection method and to find its figure of merit. 8. To convert the given galvanometer (of known resistance and figure of merit) into a voltmeter of desired range and to verify the same. 9. To convert the given galvanometer (of known resistance and figure of merit) into an ammeter of desired range and to verify the same. Experiments(b) 1. To find the value of v for different values of u in case of a concave mirror and to find the focal length. 2. To find the focal length of a convex mirror, using a convex lens. 3. To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v. 4. To find the focal length of a concave lens, using a convex lens. 5. To determine angle of minimum deviation for a given prism by plotting a graph between angle of incidence and angle of deviation. 6. To determine refractive index of a glass slab using a travelling microscope. 7. To find refractive index of a liquid by using convex lens and plane mirror. 8. To draw the I-V characteristic curve for a p-n junction in forward bias and reverse bias. 9. To draw the characteristic curve of a zener diode and to determine its reverse breaks down voltage.

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Chemistry Practical Record Class XII, Session 2019-20 List of Practicals:- SECTION-B (Mandatory) A Surface Chemistry (1) Preparation of one lyophilic and one lyophobic sol Lyophilic sol - starch, egg albumin and gum (2) Preparation of one lyophobic sol Lyophobic sol - Ferric hydroxide B Chromatography (1) Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values (distance values may be provided). C Tests for the functional groups present in organic compounds: (1) Alcoholic and Carboxylic groups. (2) Aldehydic and Ketonic D Characteristic tests of carbohydrates and proteins in the given food stuffs. E Preparation of Inorganic Compounds- MOHR SALT SECTION-B (Mandatory) F Quantitative analysis (1) (a) Preparation of the standard solution of Oxalic acid of a given volume (b) Determination of molarity of KMnO4 solution by titrating it against a standard solution of Oxalic acid. (2) The above exercise [F 1 (a) and (b)] to be conducted using Ferrous ammonium sulphate (Mohr's salt) G Qualitative analysis: (1) Determination of one cation and one anion in a given salt. Cations- NH4+ Anions – [CO3] 2-, S2-, [SO3] 2- , Cl- , CH3COO- ( Note: Insoluble salts excluded)

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