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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. [24] [25] The NCERT made two controversial changes to the class XII political science textbook ‘Politics in India Since Independence’ in 2017.
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] Textbooks created by private publishers are priced higher than those of NCERT. [11]
A similar mercury complex (HgXe)(Sb 3 F 17) (formulated as [HgXe 2+][Sb 2 F 11 –][SbF 6 –]) is also known. [26] Xenon reversibly complexes gaseous M(CO) 5, where M=Cr, Mo, or W. p-block metals also bind noble gases: XeBeO has been observed spectroscopically and both XeBeS and FXeBO are predicted stable. [27] The compound Xe 2 Sb 2 F
The p orbital can hold a maximum of six electrons, hence there are six columns in the p-block. Elements in column 13, the first column of the p-block, have one p-orbital electron. Elements in column 14, the second column of the p-block, have two p-orbital electrons. The trend continues this way until column 18, which has six p-orbital electrons.
Chemistry is the scientific study of the properties and behavior of matter. 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 ...
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Henry inferred that coordinated hydroxide attacks the ethylene ligand, an internal (syn-) pathway. [11] Later, stereochemical studies by Stille and coworkers [12] [13] [14] support an anti-addition pathway, whereby free hydroxide attacks the ethylene ligand. The conditions for Stille's experiments differ significantly from industrial process ...
Red phosphorus is often used to prepare chemicals where the P-P bond is retained. Upon room temperature action with sodium chlorite, Na 2 H 2 P 2 O 6 is formed. [17] Red phosphorus can be used as an elemental photocatalyst for hydrogen formation from the water. [18] [7] It has also been researched as a sodium ion battery anode. [19] [2]