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The Maharashtra State Board of Secondary and Higher Secondary Education (Abbreviation: MSBSHSE) is a statutory and autonomous body established under the "Maharashtra Secondary Boards Act" 1965 (amended in 1977). [1] Most important task of the board, among few others, is to conduct the SSC for 10th class and HSC for 12th class examinations. [2]
Those who wish to adopt the textbooks are required to send a request to NCERT, upon which soft copies of the books are received. The material is press-ready and may be printed by paying a 5% royalty, and by acknowledging NCERT. [11] The textbooks are in color-print and are among the least expensive books in Indian book stores. [11]
Unsaturated compounds generally carry out typical addition reactions that are not possible with saturated compounds such as alkanes. A saturated organic compound has only single bonds between carbon atoms. An important class of saturated compounds are the alkanes. Many saturated compounds have functional groups, e.g., alcohols.
C 5 H 12: n-pentane: amyl hydride; Skellysolve A 6 5 5 C 6 H 14: n-hexane: dipropyl; Gettysolve-B; hexyl hydride; Skellysolve B 7 9 11 C 7 H 16: n-heptane: dipropyl methane; Gettysolve-C; heptyl hydride; Skellysolve C 8 18 24 C 8 H 18: n-octane: dibutyl; octyl hydride 9 35 55 C 9 H 20: n-nonane: nonyl hydride; Shellsol 140 10 75 136 C 10 H 22 ...
The poem Sabse Khatarnak by the Hindi poet Pash was included in the NCERT textbook for 11th standard Hindi students in 2006. In 2017, the BJP government affiliated RSS tried to remove it but failed. [25] [26] The NCERT made two controversial changes to the class XII political science textbook ‘Politics in India Since Independence’ in 2017.
Alkanes have the general chemical formula C n H 2n+2. The alkanes range in complexity from the simplest case of methane (CH 4), where n = 1 (sometimes called the parent molecule), to arbitrarily large and complex molecules, like pentacontane (C 50 H 102) or 6-ethyl-2-methyl-5-(1-methylethyl) octane, an isomer of tetradecane (C 14 H 30).
As of alkanes, they first dehydrogenate to olefins, then form rings at the place of the double bond, becoming cycloalkanes, and finally gradually lose hydrogen to become aromatic hydrocarbons. [ 4 ] For cyclohexane, cyclohexene, and cyclohexadiene, dehydrogenation is the conceptually simplest pathway for aromatization.
The formula for acyclic saturated hydrocarbons (i.e., alkanes) is C n H 2n+2. [ 1 ] : 623 The most general form of saturated hydrocarbons, (whether linear or branched species, and whether with or without one or more rings) is C n H 2 n +2(1- r ) , where r is the number of rings.