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  2. Joint Entrance Examination – Advanced - Wikipedia

    en.wikipedia.org/wiki/Joint_Entrance_Examination...

    JEE(Advanced) is conducted in two shifts of three hours each - Paper-1 and Paper-2,(both papers are compulsory to write)both the papers consist questions from three major subjects- Physics, Chemistry and Mathematics. Unlike most of the other exams, the type , the number of questions being asked in the paper, the total marks and the marking ...

  3. Chemistry - Wikipedia

    en.wikipedia.org/wiki/Chemistry

    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.

  4. Organic chemistry - Wikipedia

    en.wikipedia.org/wiki/Organic_chemistry

    Category. v. t. e. Organic chemistry is a subdiscipline within chemistry involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms. [1] Study of structure determines their structural formula.

  5. Outline of chemistry - Wikipedia

    en.wikipedia.org/wiki/Outline_of_chemistry

    Organic chemistry (outline) – study of the structure, properties, composition, mechanisms, and reactions of organic compounds. An organic compound is defined as any compound based on a carbon skeleton. Biochemistry – study of the chemicals, chemical reactions and chemical interactions that take place in living organisms.

  6. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    8.1 In living organisms, the pH of various Body fluids , cellular compartments, and organs is tightly regulated to maintain a state of acid-base balance known as acid–base homeostasis . Acidosis , defined by blood pH below 7.35, is the most common disorder of acid–base homeostasis and occurs when there is an excess of acid in the body.

  7. List of important publications in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_important...

    Wiley-Interscience, 3rd edition, 1999, ISBN 0-471-16019-9. Wiley-Interscience, 4th edition, 2007, ISBN 0-471-69754-0. Wiley-Interscience, 5th edition, 2014, ISBN 9781118057483. Description: A comprehensive reference for the usage of protecting groups in organic synthesis. Importance: A reference publication.

  8. Valence (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Valence_(chemistry)

    The valence is the combining capacity of an atom of a given element, determined by the number of hydrogen atoms that it combines with. In methane, carbon has a valence of 4; in ammonia, nitrogen has a valence of 3; in water, oxygen has a valence of 2; and in hydrogen chloride, chlorine has a valence of 1. Chlorine, as it has a valence of one ...

  9. Resonance (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Resonance_(chemistry)

    Contributing structures of the carbonate ion. In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures (or forms, [1] also variously known as resonance structures or canonical structures) into a resonance hybrid (or hybrid structure) in valence bond theory.