When an electric current is passed through an electrolyte solution, the ions of the electrolyte undergo chemical changes at the […]
Categories
Author: StopLearn Team 2
Categories
Ionic theory
To account for the phenomena of electrolysis the Ionic Theory was put forward by Arrhenius in 1880. The theory states […]
We are familiar with the balancing of chemical equations by inspection method. However, inspection method may not be useful for […]
In our daily life we come across processes like rusting of iron articles, fading of the colour of the clothes, […]
PERIODIC TRENDS IN PHYSICAL PROPERTIES Most of the properties of the elements such as atomic volume, atomic size, ionization enthalpy, electron […]
Categories
Periodicity
PERIODICITY THE NEED FOR CLASSIFICATION OF ELEMENTS https://www.youtube.com/embed/P6DMEgE8CK8Before the beginning of eighteenth century, only a very few elements were known […]
Categories
compounds of sulphur with hydrogen
Hydrosulphuric acid (H2S). This substance is a gas having the composition expressed by the formula H2S and is commonly called hydrogen […]
Categories
Suphur and it’s compound
Sulfur belongs to the chalcogen family. Other members of the family are oxygen, selenium, tellurium, and polonium. These elements make up Group 16 (VIA) […]
Categories
Compounds of Nitrogen
Nitrogen has 5 electrons in its valence shell. It has a valency of 3 with respect to hydrogen and a […]
Categories
Nitrogen and it’s properties
Nitrogen, which makes up about 78% of our atmosphere, is a colorless, odorless, tasteless and chemically unreactive gas at room […]