Class 11 Chemistry Chapter 4 Chemical bonding and molecular structure Concept of hybridization was first introduced by Pauling. He explained shapes of polyatomic molecules. He found that, atomic orbital combine to form new set of equivalent orbitals known as hybrid orbitals. However, these hybrid orbitals are used for forming bond. This phenomena was called as […]
Chemistry
Covalent Bond
Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure Ionic bonding is possible due to large difference in the electronegativity of two atoms combining with each other. What will happen if both the atom combining chemically have similar electronegativity? This results in the formation of covalent bond. Lewis suggested that atoms having similar electronegativity, […]
The Mole Concept
Class 11 Chemistry Chapter 1 Some Basic Concept of Chemistry | Class 9 Chapter 3 Atoms and Molecules In this article we will talk about very important concept in chemistry “ Mole Concept ” and “Molar Mass”. During any chemical reaction atoms and molecules rearrange themselves to form new compound. However, atoms and molecules are […]
What is Acid Rain?
Class 11 Chemistry Chapter 14 Environmental Chemistry | Class 8 Science Chapter 18 Pollution of Air and Water Acid rain is one of the effect of air pollution. Due to harmful chemicals in air, pH of rain water drops below 5.6 making it acidic, thereby, causing acid rain. Here in this article we will talk […]
Mixture
Mixture is two or more substances mixed with each other such that each substance can be identified easily. For example, in mixture of salt and copper filings, salt and copper filings are easily distinguishable. Some other example of mixture are, salt or sugar in water, rice flakes and raisins, etc. though sugar or salt get […]
What is atomic mass?
Atomic Mass unit Word particle suggest atoms or molecules or ions. In particulars, atoms are very small indivisible unit of substance. Molecule is formed by chemical reaction of two or more atoms. Particularly, ions are charged species carrying either positive and negative charge. Now continuing with atom. Atoms are extremely small, therefore, to measure the […]
Acids and Bases
Introduction to acids and bases Among acids and bases, acids are the chemicals that turns blue litmus to red. Moreover, acids are sour to taste. For example, lemon juice. Bases are the chemicals that turns red litmus into blue. Bases are bitter to taste, for example baking soda. When acids and bases reacts with each […]
Types of Chemical Reactions
Chemical Reaction The process in which two or more substance combine to form new substance with different properties is called a chemical reaction. The substances that reacts, are called as reactants and the substances that are formed are called products. e.g. Carbon reacts with oxygen to form carbon dioxide. Chemical Equation The representation of chemical […]
Mendeleev’s Periodic Table
Dmitri Mendeleev Dmitri Mendeleev was a Russian Chemist born in 1834 at Tobolsk in Siberia. He Studied Science in St. Petersburg. In 1856 he got his graduation. He became professor in Saint Petersburg Technological Institute and Saint Petersburg State University in 1864 and 1865. Classification of Elements by Mendeleev In order to classify elements, Mendeleev […]
Solution
Solution Solution is homogeneous mixture of two or more substances. It is composed two components which are solute and solvent. Solute is present in less quantity whereas, solvent is present is large quantity in solution. For example, sugar solution[liquid solution], mixture of metals i.e. alloys [solid solution], mixture of air [i.e. gaseous solution] Amount of […]