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Chemistry Projects For Class 12 Cbse | free chemistry practical

Chemistry Projects For Class 12 Cbse

Online Chemistry Projects For Class 12 CBSE

Practicals – Chemistry Projects For Class 12

Chemistry Projects For Class 12 Cbse : Micro-chemical methods are available for several of the practical experiments. Wherever possible such techniques should be used.

A. Surface Chemistry
(a) Preparation of one lyophilic and one lyophobic sol.
Lyophilic sol : starch , egg albumin and gum.
Lyophobic sol : aluminium hydroxide, ferric hydroxide, arsenious sulphide.
(b) Dialysis of sol prepared in (a) above.
(c) Study of the role of emulsifying agent in stabilizing the emulsions of different oils.

B. Chemical Kinetics

(a) Effect of concentration and temperature on the rate of reaction between sodium thiosulphate
and hydrochloric acid .
(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.
(ii) Reaction between potassium iodate (KIO3) and sodium sulphite (Na2SO3) using starch
solution as indicator (clock reaction).

C. Thermochemistry
Any one of the following experiments :
(a) Enthalpy of dissolution of copper sulphate or potassium nitrate.
(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.

D. Electrochemistry
Variation of cell potential in Zn/Zn2+//Cu2+/Cu with change in concentration of electrolytes (CuSO4 or
ZnSO4) at room temperature.

E. Chromatography
(a) Separation of pigments from extracts of leaves and flowers by paper chromatography and
determination of Rf values.
(b) Separation of constituents present in an inorganic mixture containing two cations only (constituents
having wide difference in Rf values to be provided).

F. Preparation of Inorganic Compounds
(i) Preparation of double salt of ferrous ammonium sulphate or potash alum.
(ii) Preparation of potassium ferric oxalate.

G. 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. Test for the Functional Groups Present in Organic Compounds
Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (primary) groups.

I. Characteristic Tests of Carbohydrates, Fats and Proteins in Pure Samples and Their Detection in Given Food Stuffs.

J. Determination of Concentration/Molarity of KMnO4 Solution by Titrating it against a Standard Solution of
(i) Oxalic acid
(ii) Ferrous ammonium sulphate
(Students will be required to prepare standard solutions by weighing themselves).

K. Qualitative Analysis
• Determination of one cation and one anion in a given salt.
Cations – Pb2+,Cu2+,As3+,Al3+,Fe3+,Mn2+,Ni2+,Zn2+,Co2+,Ca2+,Sr2+,Ba2+,Mg2+,NH4+
Anions – CO2-3,S2-,SO2-3,SO2-4,NO2,NO3,Cl, Br, I,PO3-4,C2O2-4,CH3COO
(Note : Insoluble salts excluded)

Projects – Chemistry Projects For Class 12

Scientific investigations involving laboratory testing and collecting information from other sources.

A few suggested projects
• Study of presence of oxalate ions in guava fruit at different stages of ripening.
• Study of quantity of casein present in different samples of milk.
• Preparation of soybean milk and its comparison with the natural milk with respect to curd
formation, effect of temperature, etc.
• Study of the effect of potassium bisulphate as food preservative under various conditions
(temperature, concentration, time etc.)
• Study of digestion of starch by salivary amylase and effect of pH and temperature on it.
• Comparative study of the rate of fermentation of following materials: wheat flour, gram flour,
potato juice, carrot juice etc.
• Extraction of essential oils present in Saunf (aniseed), Ajwain (carum), Illaichi (cardamom).
• Study of common food adulterants in fat, oil, butter, sugar, turmeric powder, chilli powder and
pepper.
Note: Any other investigatory project, which involves about 10 periods of work, can be chosen with
the approval of the teacher. In addition models and exhibits for exhibition ,depicting basic principles and
application in daily life may also be included .

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