chemistry investigatory projects for class 12 cbse free download

Preparation of Organic Compounds Preparation of any one of the following compounds: (I) Acetanilide (II) Di-benzal acetone (III) p-Nitroacetanilide (IV) Aniline yellow or 2 – Napththol aniline dye H. (ii) Preparation of potassium ferric oxalate. Maza Ghar Maza Sansar Marathi Movie Song Free Download. Preparation of Inorganic Compounds (i) Preparation of double salt of ferrous ammonium sulphate or potash alum.

(b) Separation of constituents present in an inorganic mixture containing two cations only (constituents having wide difference in R f values to be provided). Chromatography (a) Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of R f values. Electrochemistry Variation of cell potential in Zn/Zn 2+//Cu 2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO 4) at room temperature. (b) Enthalpy of neutralization of strong acid (HCl) and strong base (NaOH) (c) Determination of enthalpy change during interaction (Hydrogen bond formation) between acetone and chloroform.

Thermochemistry Any one of the following experiments: (a) Enthalpy of dissolution of copper sulphate or potassium nitrate. (ii) Reaction between potassium iodate (KIO3) and sodium sulphite (Na2SO3) using starch solution as indicator (clock reaction).

(b) Study of reaction rates of any one of the following: (i) Reaction of iodide ion with hydrogen peroxide at room temperature using different concentrations of iodide ions. Chemical Kinetics (a) Effect of concentration and temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid. (c) Study of the role of emulsifying agent in stabilizing the emulsions of different oils. (b) Dialysis of sol prepared in (a) above. Lyophobic sol: aluminium hydroxide, ferric hydroxide, arsenious sulphide. Lyophilic sol: starch, egg albumin and gum. Surface Chemistry (a) Preparation of one lyophilic and one lyophobic sol.

Chemistry investigatory projects for class 12 cbse free download