(i) – (c), (ii) – (e),(iii) – (a), (iv) – (b), (v) – (d)

Explanation:

(i) Dumas method is used for estimation of the Nitrogen, from organic compounds by heating the organic compounds Nitrogen gas is produced and the amount of the nitrogen gas is estimated, hence option (c), is correct.

(ii) Kjeldahl’s method is used for estimation of the Nitrogen but in this case the nitrogen containing organic compound is heated in sulphuricacid, and ammonium sulphate is formed, and from ammonium sulphate the amount of N is estimated, hence option (e), is correct.

(iii) Carius method is used to estimate the halogen quantity, some amount of an organic compound containing halogen is heated with fuming nitric acid in the presence of silver nitrate, as a result silver halide is formed which is analysed for finding the amount of halogen, hence option (a), is correct.

(iv) Silica gel isused for packing the column in the Chromatography, hence option (b), is correct.

(v) Homolysis is the process which leads to the formation of free radicals, hence option (d), is correct.