Class 12

Introduction: Are you preparing for the prestigious IIT-JEE exam this year? Unacademy brings the best topic-wise notes on all important subjects including chemistry for IIT-JEE aspirants. Out of all important topics, let us discuss the group 17 elements of the periodic table in this section, i.e., about halogens. It is derived from the Greek words, […]

Introduction: The Group 18 of the modern periodic table comprises of Noble Gas elements. They are inert in nature and very rarely or in drastic conditions react with other elements. Hence, they are known as Noble gases or inert gases. It is now known, however, that many of these elements are abundant on Earth. The use

When an electron-pair donor reacts with an electron pair acceptor, the reaction is termed a nucleophilic substitution reaction. The electron-pair donor is termed a nucleophile.  They are named so because they are attracted to the nucleus of an atom. In a nucleophilic substitution reaction, the nucleophile reacts with a haloalkane. The haloalkane has a halogen

Halogens, commonly referred to as “X”, are a group of 17 elements with high electronegativity. Halogens include elements such as fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Among them, fluorine has the highest electronegativity. Elements in this group are missing only one electron required to complete the noble gas arrangement.  Compounds

Introduction  Iodoform, commonly known as triiodomethane CHI3, is a yellow crystalline substance. It is water-insoluble but soluble in solvents such as ethanol, chloroform, and ether. When handled with an aqueous sodium hydroxide solution, it is hydrolysed, yielding sodium methanoate (sodium formate). Freons are chlorofluorocarbon compounds derived from methane and ethane. The term “chlorofluorocarbon compounds” refers