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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 substances.
Modern Standard Hindi ( Hindi: आधुनिक मानक हिन्दी, romanized : Ādhunik Mānak Hindī ), [14] commonly referred to as Hindi (Hindi: हिन्दी, [a] Hindī ), is an Indo-Aryan language spoken chiefly in North India, and serves as the lingua franca of the Hindi Belt region encompassing parts of northern ...
The reaction can be written as: −OCl + H+ ⇌ HOCl. Sodium hypochlorite solutions combined with acid evolve chlorine gas, particularly strongly at pH < 2, by the reactions: HOCl (aq) + Cl− + H+ ⇌ Cl2(aq) + H2O. Cl2(aq) ⇌ Cl2(g) At pH > 8, the chlorine is practically all in the form of hypochlorite anions ( OCl− ).
Chemical nomenclature. Chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC). IUPAC Nomenclature ensures that each compound (and its various isomers) have only ...
Alchemy (from Arabic: al-kīmiyā; from Ancient Greek: χυμεία, khumeía) [1] is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. [2] In its Western form, alchemy is first attested in a number of pseudepigraphical texts ...
Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans.
The end of a sentence or half-verse may be marked with the "।" symbol (called a daṇḍa, meaning "bar", or called a pūrṇa virām, meaning "full stop/pause"). The end of a full verse may be marked with a double-daṇḍa, a "॥" symbol. A comma (called an alpa virām, meaning "short stop/pause") is used to denote a natural pause in speech.
Hindi literature ( Hindi: हिन्दी साहित्य, romanized : hindī sāhitya) includes literature in the various Hindi languages which have different writing systems. Earliest forms of Hindi literature are attested in poetry of Apabhraṃśa like Awadhi, and Marwari languages. Hindi literature is composed in three broad ...