protein

-
Protein
The name protein was first introduced in 1838 by a Swedish chemist Berzelius.
It is the complex organic nitrogenous substances found in the cells of the living beings.

Comments

Post a Comment

Popular posts from this blog

Ohm's law

-
                    Ohm's law  Ohm's law gives a relationship between current and potential difference. According to Ohm's law -      At constant temperature, the current flowing through a conductor is directly proportional to the potential difference across its end.         If I is the current flowing through a conductor and V is the potential difference ( or voltage) across its ends,then according to Ohm's law -              I ~ V   ( At constant temperature)       or,  V~ I       or,   V =  R  ×  I Where R is a constant called       " resistance'' of the conductor.  The SI unit of resistance is ohm. The value of this constant depends on the nature, length,are a of cross - section and temperature of the conductor.             ...
Read more

Trichloromethane(chloroform)

-
Trichloromethane  (chloroform)       CHCl3  Trichloromethane is a trichloro derivative of methane. It is commonly called as chloroform. Methods of preparation-  It is prepared by the chlorination of methane in the presence of sunlight.          Sunlight CH4 -------------------> CH3Cl + HCl             +Cl2              Sunlight CH3Cl ---------------> CH2Cl2+ HCl                +Cl2              Sunlight CH2Cl2 ---------------> CHCl3+ HCl                  +Cl2 Properties- (1) colourless heavy liquid (2) sweet taste  (3) it is oxidised in the sunlight and form a harmful gas carbonyl chloride which is commonly called as phosgene.                     Sunligh...
Read more

Force

-
                  Force  When we want to open a door, we have to push the door handle. And when we want to close the door, we have to pull the door handle with our hands. This means that to move a body or an object, it has either to be pushed or pulled.           A push or pull on a body is called force. The direction in which a body is pushed or pulled is called the direction of force.         Forces are used in our everyday actions like pushing, pulling, lifting, stretching, twisting and pressing. For example - A force is used when we push (kick) a football.   Effects of force -       A force cannot be seen. A force can be judged only by the effects which it can produce in various bodies or objects around us . A force can produce the following effects -  1) A force can move a stationary body. 2) A force can stop a moving body. 3) A for...
Read more