The chemistry of plant and animal life . tating to the throat and lungs. Make the following tests : (I) Observe the effect which thechlorin gas has upon the cloth,paper, and leaf. (2) To the cylin-der, add 5 cc. water containing twoor three drops of indigo the result. Questions. (i) Give the physicalproperties of CI gas, odor, weight,and color. (2) What caused theliberation of the CI gas from theHCl? (3) Write the reaction. (4)What are some of the chemicalproperties of chlorin as observed F»&-4i-—Preparation of the changes which have taken place in the materials i
The chemistry of plant and animal life . tating to the throat and lungs. Make the following tests : (I) Observe the effect which thechlorin gas has upon the cloth,paper, and leaf. (2) To the cylin-der, add 5 cc. water containing twoor three drops of indigo the result. Questions. (i) Give the physicalproperties of CI gas, odor, weight,and color. (2) What caused theliberation of the CI gas from theHCl? (3) Write the reaction. (4)What are some of the chemicalproperties of chlorin as observed F»&-4i-—Preparation of the changes which have taken place in the materials in thecylinder? (5) What is a chlorid ? (6) Name five compounds con-taining chlorin. (7) Why is CI gas employed as a disinfectant?Explain its action as a disinfectant. (8) What is bleaching-powder,and how is it used as a disinfectant? (9) NaCl is necessary foranimal life ; CI is one of the elements of the compound ; CI is de-structive to animal life ; why can you not conclude that NaCl containing CI is destructive to animal life ?. 84 AGRICUIvTURAI, CHEMISTRY 89. Properties.—Physically considered, chlorin is aheavy, greenish yellow gas, with a penetrating, suffo-cating odor. Chlorin gas is poisonous. Chemically, itis an active element and has strong affinity for nearly allother elements. It readily combines with metals, form-ing chlorids, and light and heat are evolved during thereaction. Chlorin is an active bleaching reagent, as itchanges the composition of vegetable dyes, thus destroy-ing their color. Bleaching-powder is a mixture of cal-cium hypochlorite and calcium chlorid, and when usedchlorin is liberated, Chlorin is also used as a disinfectantand as a germicide, for it is destructive to life, particu-larly to the lower forms. It is used extensively for bothbleaching and disinfecting purposes. Chlorin takes nopart directly in life processes, although its compounds,particularly sodium chlorid, are necessary as mineral foodfor animals. 90. The Chlorin Group of Elements
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