Monthly archives: April, 2014

Chemistry Notes Benzene

introduction Benzene is an organic compound with molecular formula C6H6. Benzene molecule is made of six carbon atoms joined in a ring, with one H-atom attached to each C-atom. Because of its molecules contain only carbon and hydrogen atoms, benzene is also known as a hydrocarbon. it is a natural constituent of crude oil, it …

12 Class Chapter 6- General principle and process of isolation of the elements

General Principle and Process of Isolation of Elements Minerals: –                 These are naturally occurring chemical substances in the in the earth crust obtainable by mining. Ores   : –         only few minerals are used as sources of that metal. Such minerals are known as ores. Gangue: –             ores …

12 Class Chapter 5- Surface chemistry

                            Surface Chemistry Adsorption: –                    The accumulation of molecular species at the surface rather than bulk of solid or liquid is called Adsorption. Adsorbate: –                  The molecular species or substance which accumulate at the surface. Adsorbent: –                  …

12 Class Chapter 3- Electrochemistry

ELECTROCHEMISTRY Electrolysis:                     It is the process of decomposition of an electrolyte by the passage of electricity through its aqueous solution or molten state. Faraday’s first law of electrolysis:                                                         In a chemical reaction, the amount of any substance deposited or liberated is directly proportional to the quantity of electricity passed through it.                                     W …

12 Class Chapter 2- Solution

SOLUTION                                                           Solution:–                 A solution is homogeneous mixture of two or more chemically non-reacting substances, whose composition can be varied within certain limits. Expressing concentration of solutions 1.      Percentage:- =>  mass percentage (%) of a component  (W/W)                   = Mass of the component in solution*100 / Total mass of the solution =>  volume percentage …

12 Class Chapter 1- Solid State

Solid State Chemistry Solid: –          Matter which posses rigidity having definite shape &volume is called solid. Types of solid:- 1.      Crystalline Solid :- Eg:- Metals And Non metals 2.      Amorphous Solid :- Eg:- Rubber ,Glass ,Plastic Difference and Comparison between of characteristics Crystalline Solid: –                             Contain regular arrangement having short …

11 Class Chapter 2- Structure of Atom

Atomic  Theory of matter:-                                             According to this theory , atom is the ultimate particle of matter , also known as Dalton’s  Atomic theory (1808). Cathode ray discharge tube experiments: –  1.     Cathode rays start from cathode and move toward anode. 2.     These rays are not visible but there behaviour can be observed with fluorescent …

11 Class Chapter 1- Some Basic Concept of Chemistry

Some Basic Concept Of Chemistry Some Basic Concept Of Chemistry   Basic constituents of matter:- Atoms and molecules. What is chemistry:- It is the branch of science which deals with the study of composition, properties and interaction of matter. Matter:- Anything which has mass and occupies space known as matter. Ex:- Water, pencil, pen, book …