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How to carry out Haloform Reaction With Nitric Acid

When chloroform reacts with nitric acid, nitrochloroform (chloropicrin) and water are formed.

Nitration: The hydrogen of the chloroform is replaced by nitro group when it is treated with concentrated nitric acid. The product formed is chloropicrin or trichloronitro methane or nitro chloroform. It is a liquid, poisonous and used as an insecticide and a war gas.
 
CHCI3 + HONO2    ————→      CNO2 CI3  +  H2O                      
               Nitric acid                    Chloropicrin (Tear gas)

 Chloropicrin, also known as PS, is a chemical compound currently used as a broad-spectrum antimicrobial, fungicide, herbicide, insecticide, and nematicide. Its chemical structural formula is Cl3CNO2.

In agriculture, chloropicrin is injected into soil prior to planting a crop in order to clean the soil of a broad spectrum of fungi, microbes, insects, and other harmful pests. It is commonly used as a stand alone treatment or in combination / co-formulation with methyl bromide and 1,3-Dichloropropene.

Mr. Lalit Sardana(IIT-JEE AIR 243) is going to teach you formation of chloropicrin and he has covered its uses as well. He is a leading faculty on this online coaching website and has a lot of experience in teaching students. The topic has been neatly and properly explained to the students and if still students find it difficult to understand, they can drop their queries in Ask module of our site. This topic is asked in the 11th CBSE, 12th CBSE, and in competitive exams like JEE Advanced, JEE Mains, AIPMT, NEET, KCET, MPPET, AFMC, J and K engineering,etc. 

Watch the video on this link http://www.studyadda.com/videos/jee-chemistry-lectures/haloforms/reaction-with-nitric-acid/1437

If you have any doubts, questions or if you want videos of any particular subject to be uploaded mention them in the comment box. 

 


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