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The traditional Balz–Schiemann reaction employs HBF 4 and involves isolation of the diazonium salt. Both aspects can be profitably modified. Other counterions have been used in place of tetrafluoroborates, such as hexafluorophosphates (PF 6 −) and hexafluoroantimonates (SbF 6 −) with improved yields for some substrates.
The exam duration is 3 hours (180 min). The exam is of 720 marks (maximum marks). Since 2021, there has been a significant alteration in the format of the question paper. The latest structure includes two sections, i.e. A and B, in all four subjects, namely Physics, Chemistry, Botany, and Zoology. There are 180 questions, all mandatory to be ...
Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
In terms of reaction mechanism, the Hunsdiecker reaction is believed to involve organic radical intermediates. The silver salt 1 reacts with bromine to form the acyl hypohalite intermediate 2 . Formation of the diradical pair 3 allows for radical decarboxylation to form the diradical pair 4 , which recombines to form the organic halide 5 .
Physics, Chemistry, Mathematics, Biology: Purpose: Admission to undergraduate science programs (BS Four-year and BS-MS Dual Degree Five-year programs) in 7 IISERs, BS Four-year program in IISc, and BS Four-year program of MSE in IIT Madras only. Year started: 2010 (15 years ago) () Duration: 3 hours: Score range-60 to +240: Offered: once in a year
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A syllabus (/ ˈ s ɪ l ə b ə s /; pl.: syllabuses [1] or syllabi [2]) [3] or specification is a document that communicates information about an academic course or class and defines expectations and responsibilities.
All courses are full-time. In the 2014–15 academic year courses started including M.Tech. in every branch, and a 5-years integrated courses (integrated M.Sc.) along with a 2-years M.Sc. in applied physics, applied chemistry and mathematics and computing. Each academic year consists of two semesters and a summer term.