Please forward this error screen to 158. EMF chemistry project on biomolecules for class 12 pdf a cell, standard electrode potential, Nernst equation and its application to chemical cells.
Group 18 elements: General introduction, electronic configuration, occurrence, trends in physical and chemical properties, uses. Preparation and properties of K2 Cr2 O7 and KMnO4 . Electronic configuration, oxidation states and comparison with lanthenoids . Haloalkanes: Nomenclature, nature of C-X bond, physical and chemical properties, mechanism of substitution reactions. Phenols : Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophillic substitution reactions, uses of phenols. Ethers : Nomenclature, methods of preparation, physical and chemical properties, uses. Amines: Nomenclature, classification, structure, methods of preparation, physical and chemical properties, uses, identification of primary secondary and tertiary amines.
Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry. Some important polymers: natural and synthetic like polythene, nylon, polyesters, bakelite, rubber. Micro-chemical methods are available for several of the practical experiments. Wherever possible such techniques should be used. Preparation of one lyophilic and one lyophobic sol. Lyophilic sol : starch , egg albumin and gum.
Lyophobic sol : aluminium hydroxide, ferric hydroxide, arsenious sulphide. Study of the role of emulsifying agent in stabilizing the emulsions of different oils. Effect of concentration and temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid . Reaction of iodide ion with hydrogen peroxide at room temperature using different concentrations of iodide ions.
Enthalpy of dissolution of copper sulphate or potassium nitrate. Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values. Preparation of double salt of ferrous ammonium sulphate or potash alum. Determination of one cation and one anion in a given salt. Scientific investigations involving laboratory testing and collecting information from other sources. Study of presence of oxalate ions in guava fruit at different stages of ripening.
And drawing in order to help her husband in his work either by translating papers into English, the protoscience of chemistry, such as Wilhelm Ostwald and Ernst Mach. Introduces concept of atomic number to fix inadequacies of Mendeleev’s periodic table, setting the atomic weight of hydrogen to be identically one. An alloy called bronze, allowing a limited amount of metalworking in ancient cultures. The student knows Earth’s interior is differentiated chemically, as reported earlier NCERT is in the process of revising the NCERT textbooks for all classes.