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All India Secondary School Examination, commonly known as the class 10th board exam, is a centralized public examination that students in schools affiliated with the Central Board of Secondary Education, primarily in India but also in other Indian-patterned schools affiliated to the CBSE across the world, taken at the end of class 10. The board ...
540 Chemistry. 540 Chemistry and allied sciences; 541 Physical chemistry; 542 Techniques, procedures, apparatus, equipment, materials; 543 Analytical chemistry; 544 No longer used — formerly "Qualitative analysis" 545 No longer used — formerly "Quantitative analysis" 546 Inorganic chemistry; 547 Organic chemistry; 548 Crystallography; 549 ...
Iron rusting has a low reaction rate. This process is slow. Wood combustion has a high reaction rate. This process is fast. The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. [1]
In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical reaction occurs. [1] A chemical mechanism is a theoretical conjecture that tries to describe in detail what takes place at each stage of an overall chemical reaction. The detailed steps of a reaction are not observable in most cases.
CBSE conducts the final examinations for Class 10 and Class 12 every year in the month of February and March. The results are announced by the end of May. [ 8 ] The board earlier conducted the AIEEE Examination for admission to undergraduate courses in engineering and architecture in colleges across India, however the AIEEE exam was merged with ...
Each distinct atomic number therefore corresponds to a class of atom: these classes are called the chemical elements. [5] The chemical elements are what the periodic table classifies and organizes. Hydrogen is the element with atomic number 1; helium , atomic number 2; lithium , atomic number 3; and so on.
Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur. The substance (or substances) initially involved in a chemical reaction are called reactants or reagents.
A molecular orbital diagram, or MO diagram, is a qualitative descriptive tool explaining chemical bonding in molecules in terms of molecular orbital theory in general and the linear combination of atomic orbitals (LCAO) method in particular.