1. Tissue is a group of cells having similar origin, structure& function. Study of tissues is called Histology
2. In unicellular organism (Amoeba) single cell performs all basic functions, whereas in multi-cellular...
1. All the living organisms are made up of fundamental unit of life called” cell”.
2. The cell is a Latin word for “a little room”.
3. The scientist Robert Hooke saw a little room in the cork (the bark of a tree)...
Contribution to the Atomic theory Timeline
• More than 2400 years ago, he named the smallest piece of matter “ATOMOS ,” meaning “not to be cut.” To Democritus,
• Atoms were small, hard particles that were...
1.Laws of Chemical Combination
Verification of “Law of Conservation of mass”
A solution of sodium chloride and silver nitrate are taken separately in the two limbs of an 'H' shaped tube.
The tube is sealed and...
Particle Nature of Matter
Anything that occupies space and has mass and is felt by senses is called matter. Matter is the form of five basic elements the Panch tatva – air , earth ,fire , sky and water.
Characteristics of particles of...
Medicines or Drugs
Chemicals which may be used for the treatment of diseases and for reducing the suffering from pain are called medicines or drugs.
The branch of science which makes use of chemicals for the treatment of disseases [therapeutic...
Biomolecules are the organic compounds which form the basis of life, i.e., they build up the living system and responsible for their growth and maintenance.
The sequence that relates biomolecules to living organism is
Biomolecules →...
The word polymer has a Greek origin. which means many units (parts). Polymer is defined as a chemical substance of a high molecular mass formed by the combination of a large number of simple molecules, called monomers....
Amines constitute an important class of organic compounds derived by replacing one or more hydrogen atoms ofNH 3 molecule by alkyl/aryl group(s).
In the IUPAC system, the amines are regarded as alkanamines, e.g.,
Structure
The...
In aldehydes, the carbonyl group ( )C=O) is bonded to carbon and hydrogen, while in the ketones, it is bonded to two carbon atoms
Nature of Carbonyl Group
The carbon and oxygen of the carbonyl group are Sp2 hybridised and the carbonyl...
Alcohols and Phenols
Alcohols and phenols are formed when a hydrogen atom in hydrocarbon, aliphatic and aromatic respectively, is replaced by hydroxyl group (-OR group).
Classification of Alcohols and Phenols
In alcohols, -OR group is...
The replacement of hydrogen atom(s) in hydrocarbon, aliphatic or aromatic, by halogen atom(s) results in the formation of alkyl halide (haloalkane) and aryl halide (haloarene), respectively.
Classification of Halogen Derivatives
On the basis...
Coordination compounds are those addition molecular compounds which retain their identity in solid state as well as in dissolved state. In these compounds. the central metal atom or ion is linked by ions or molecules with coordinate bonds. e.g.,...
The d-block of the Periodic Table contains the elements of the groups 3-12 in which the d·orbitals are progressively filled. There are mainly three series of the elements, 3d-series (Sc to Zn) 4d-series (Y to Cd) and 5d-series (La to Hg...
Earth crust is the source of many elements. Out of these elements, 70% are metals. Aluminium is the most abundant metal of earth crust and iron comes second. The percentage of different elements in earth crust are
O-49%, Si-26%, Al-7.5%,...
Surface Chemistry is the branch of chemistry which deals with the phenomenon that occurs on the surfaces or interfaces, such phenomenon includes corrosion. catalysis, crystallisation, etc
Adsorption
Due to unbalanced attraction forces,...
The branch of chemistry, which deals with the rate of chemical reactions. the factors affecting the rate of reactions and the mechanism of the reaction. is called chemical kinetics.
Chemical Reactions on the Basis of Rate of...
Electrochemistry is that branch of chemistry which deals with the study of production of electricity from energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical...
Solution is a homogeneous mixture of two or more substances in same or different physical phases. The substances forming the solution are called components of the solution. On the basis of number of components a solution of two components is called...