cover image: Journal of the Indian Chemical Society  May  1934

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20.500.12592/x482s8

Journal of the Indian Chemical Society May 1934

1934

As long as there was no chemical reaction between chlorine and hydrogen on illumination a photograph of the cell which appeaed to be empty was obtained on the film but when the reaction started and in the course of about 1/50 second a cloud developed in the reaction mixture and the increased light absorption due to the occurrence of the cloud or the fog in the mixture of hydrogen and chlori [...] 1925 21.532) and others as evidence of chain reactions appears to us to be a case of the weakening of the binding forces of the chlorine molecules due to the presence of hydrogen and the consequent increase in light absorption by the system and suports our view that an increase in the chemical reactivity is associated with increased light absorption. [...] It is of interest to note that both the velocity of the reaction and the light absorption are greater in the reaction between hypophosphorous acid and iodine than in the reaction between phosphorous acid and iodine. [...] and in every case whenever there is the possibility of a chemical change between a halogen molecule and a reducing agent and a weakening of the bining forces of the atoms in the halogen molecules takes place it has always been observed that the light absorption by the mixture of the 2320 N. R. DHAR AND A. K. BHATTACHARYA two reacting substances is appreciably greater than the absorption due to [...] The heats of the reactions as calculated from the thermochemical measurements of Thomsen are as follows : K2C204 + C12 84 Cal; K2C204-1-Br2 62 Cal; K20204+12 32 Cal; but the energies of activation of the three reactions are in the reverse order the iodine reaction has the largest and the chlorine the least energy of activation.
technology medicine science
Pages
114
Published in
India
SARF Document ID
sarf.120026
Segment Pages Author Actions
Frontmatter
i-iv J.C. Ghosh, A.C. Sircar view
Chemical Reactivity and Light Absorption. Part II
311-x N.R. Dhar, A.K. Bhattacharya view
Composition of Prussian and Turnbull’s Blue. Part II. Study of the Constituents of their Filtrates
325-330 Abani K. Bhattacharya view
Dark Reaction between Sodium Formate and iodine
331-338 S.S. Doosaj, W.V. Bhagwat view
Amylase from Sweet Potato (Ipomoea Batatas)
339-350 K. Giri view
Halogenation. Part IX. Bromination of Pseudocumene
351-352 Phuldeo Varma, Dhirendra Sen-Gupta view
Extension of Michael’s Reaction. Part IV
353-362 Tejendra Ghosh, Praphulla Guha view
Studies in Heterocyclic Compounds. Part III
363-372 Anukul Sircar, Susthir Sen view
Action of Alkali on 4-Methyl-1 :2-naphthapyrone and its 3-Chloro- ad 3-Bromo Derivatives. Formation of cis- and trans-Hydroxynaphthylcrotonic Acids and a New Naphthylpropionic Aldehyde Derivative
373-380 B.B. Dey, A.K. Lakshminarayanan view
Reactivity of the Methylene Group in Coumarin-3- acetic Acids. Condensation with Aromatic Aldehydes
381-388 B.B. Dey, Y. Sankaranarayanan view
Formation and Transformation of Carbon Ring Compounds. Part I. Selenium Dehydrogenation of 1 :.2 :3 :4-Tetrahydronaphthalene- 3 : 3-spiro-cyclopentane
389-394 Suresh Sengupta view
Indigoid Vat Dyes of the Isatin Series. Indole-thionaphtheneindigos
395-400 Sisir Guha, Hari Basu-Mallik view
The Synthesis of O-Aldehydocarboxylic Acids
401-402 John Gardner view
A Note on the Use of Dimercaptothiobiazole as an Analytical Reagent
403-404 Jagannath Gupta view
Review
405-405 unknown view
Backmatter
i-v unknown view

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