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The majority of candidates enter the exam through their respective schools, but those who have completed their school education can also apply as private candidates. The qualification also serves as an entrance requirement for Sri Lankan state universities. The exams are offered in three mediums: Sinhala, Tamil, and English.
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.
Aluminium hydride (also known as alane and alumane) refers to a collection of inorganic compounds with the formula Al H 3.As a gas, alane is a planar molecule. When generated in ether solutions, it exists as an ether adduct.
2 al(ch 3) 3 + o 3 → al 2 o 3 + 3 c 2 h 6 The Al 2 O 3 films prepared using O 3 show 10–100 times lower leakage current density compared with those prepared by H 2 O. Aluminium oxide, being a dielectric with relatively large band gap , is used as an insulating barrier in capacitors .
Aluminium sulfate is rarely, if ever, encountered as the anhydrous salt. It forms a number of different hydrates, of which the hexadecahydrate Al 2 (SO 4) 3 ·16H 2 O and octadecahydrate Al 2 (SO 4) 3 ·18H 2 O are the most common. The heptadecahydrate, whose formula can be written as [Al(H 2 O) 6] 2 (SO 4) 3 ·5H 2 O, occurs naturally as the ...
A look back at the most memorable photos from 2023, chosen by TIME's photo editors.
Thalappil Pradeep [1] is an institute professor and professor of chemistry in the Department of Chemistry at the Indian Institute of Technology Madras. He is also the Deepak Parekh Chair Professor. In 2020 he received the Padma Shri award for his distinguished work in the field of Science and Technology. [2]
Sodium bis(2-methoxyethoxy)aluminium hydride (SMEAH; [1] trade names Red-Al, Synhydrid, Vitride) is a hydride reductant with the formula NaAlH 2 (OCH 2 CH 2 OCH 3) 2. The trade name Red-Al refers to its being a reducing aluminium compound. It is used predominantly as a reducing agent in organic synthesis.