21CHY387 PRACTICALS Chemistry Paper IX-

Organic preparations:

Recrystallisation and determination of melting point and its importance
may be mentioned
(a) Acetylation: Preparation of acetanilide from aniline
(b) Oxidation: Preparation of benzoin acid from benzaldehyde
(c) Nitration: Preparation of m-dinitrobenzene from benzene
(d) Hydrolysis: preparation of benzoic acid from ethyl benzoate

Quantitative organic analysis (Any four):

(a) Estimation of aniline by bromate-bromide method
(b) Estimation of glucose by Fehlings method
(c) Determination of iodine value of an oil by Vij’s method
(d) Determination of saponification value of an ester / oil
(e) Estimation of amino acid by formal titration method
(f) Estimation of ascorbic acid in Vitamin C tablets by Volumetry
(g) Estimation of Paracetamol by titrimetric and photo spectrometric methods.
(h) Gravimetric Analysis of Lead, Iron and Nickel

Chromatographic Techniques (Any two):

(i) Thin Layer Chromatography Determination of Rf values and identification of organic compounds:
(a) Separation of green leaf pigments (spinach leaves may be used)
(b) Separation of mixture of dyes
(ii) Paper Chromatography Determination of Rf values and identification of organic compounds:
(iii) Column Chromatography: Separation of ortho and para nitroanilines