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Biochemistry
The term Biochemistry was first introduced by a German chemist Carl Neuberg in 1903.
It is the science concerned with the chemical nature and chemical behaviour of the living matter.
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. ...
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...
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...
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