Page 7 - Chemistry - XII

G. Preparation of Organic Compounds

Preparation of any one of the following compounds

(i) Acetanilide
(ii) Di -benzalacetone
(iii) p-Nitroacetanilide
(iv) Aniline yellow or 2 - Naphthol anilinedye.

H. Tests for the functional groups present in organic compounds

Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (Primary) groups.

I. Characteristic tests of biomolecules

Tests for carbohydrates, fats and proteins in pure samples and their detection in given foodstuffs.

J. Titrimetric analysis

Determination of concentration/ molarity of KMnO solution by titrating it against a standard solution of:
4
(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. (Note: Insoluble salts excluded)
Cations- Pb , Cu , As , Al , Fe , Mn , Ni , Zn , Co , Ca , Sr , Ba , Mg , NH +
3+
2+
3+
2+
2+
2+
2+
3+
2+
2+
2+
2+
2+
4
Anions – CO , S , NO , SO , SO , NO , Cl , Br , I , PO , CH COO –
2–
–
–
–
3–
–
2–
2–
2–
2–
3
3
4
3
4
3
PROJECTS
Scientific investigations involving laboratory testing and collecting information from other sources A few
suggested Projects.
Ø Study of the presence of oxalate ions in guava fruit at different stages of ripening.
Ø Study of quantity of casein present in different samples of milk.
Ø Preparation of soybean milk and its comparison with the natural milk with respect to curd formation, effect
of temperature, etc.
Ø Study of the effect of Potassium bisulphate as food preservative under various conditions (temperature,
concentration, time, etc.)
Ø Study of digestion of starch by salivary amylase and effect of pH and temperature on it.
Ø Comparative study of the rate of fermentation of following materials: wheat flour, gram flour, potato juice,
carrot juice, etc.
Ø Extraction of essential oils present in Saunf (aniseed), Ajwain (carum), Illaichi (cardamom).
Ø Study of common food adulterants in fat, oil, butter, sugar, turmeric power, chilli powder and pepper.