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Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
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.
The latest structure includes two sections, i.e. A and B, in all four subjects, namely Physics, Chemistry, Botany, and Zoology. Section A comprises 35 mandatory questions, while Section B contains 15 questions, out of which 10 questions are to be answered, leading to a total of 200 questions, with 180 questions that can be answered. [19]
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 January 2025. Educational assessment For other uses, see Exam (disambiguation) and Examination (disambiguation). Cambodian students taking an exam in order to apply for the Don Bosco Technical School of Sihanoukville in 2008 American students in a computer fundamentals class taking an online test in ...
The exam can be taken by those who studied physics, Chemistry, Mathematics and English in the 10+2 level as these subjects are tested in the examination. In 2024, a total of 1,42,694 candidates appeared for the WBJEE 2024 exam and 1,42,023 passed the exam. [ 2 ]
While the term chemical substance is a precise technical term that is synonymous with chemical for chemists, the word chemical is used in general usage to refer to both (pure) chemical substances and mixtures (often called compounds), [14] and especially when produced or purified in a laboratory or an industrial process.
A chemical composition specifies the identity, arrangement, and ratio of the chemical elements making up a compound by way of chemical and atomic bonds.. Chemical formulas can be used to describe the relative amounts of elements present in a compound.
Fields in the Natural Science includes Biology, Chemistry, Mathematics, Physics, while Geography, Social Studies, history in the Social Science. The other general subjects are mandatory to both streams such as English, Physical Education and national and foreign language subjects. And it's scored out of 600 for both natural and social stream [5]