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chemistry 12th class cbse notes

Oxidation States

Negative and Positive Oxidation state: The elements of Group 16 exhibit a number of oxidation states (Above Table). ...
12th physics. NCERT notes

Wattless Current

The current in a.c. circuit is said to be wattles if the average power consumed in the circuit is zero. The average power of an...
12th physics. NCERT notes

Zener Diode

Zener diode Zener diode is a reverse biased heavily doped semiconductor (silicon or germanium) PN junction diode, which is operated exclusively in the breakdown region. The...
chemistry 12th class cbse notes

Oxidation Reduction

Oxidation-Reduction Besides reduction, some extraction is based on oxidation particularly for non-metal. For extraction of chlorine from brine.
12th physics. NCERT notes

PN Junction diode

PN Junction diode: If one side of a single crystal of pure semiconductor (Ge or Si) is doped with acceptor impurity atoms and the other...
chemistry 12th class cbse notes

Nomenclature of Haloalkanes and Haloarenes

The common names of alkyl halides are derived by naming the alkyl group followed by the halide. Alkyl halides are named as halo-substituted hydrocarbons...
Effect of Temperature on Resistance

Effect of Temperature on Resistance

Temperature dependence of resistance: When temperature increases, the no. of collisions increases due to more internal energy and relaxation time decreases. Therefore, Resistance increases. Temperature Coefficient...
chemistry 12th class cbse notes

Oxides of Nitrogen

Oxides of nitrogen Nitrogen forms a total of five oxides from +1 oxidation states to +5 oxidation state. The five oxides of nitrogen are N2O,...
chemistry 12th class cbse notes

Enzymes

Enzymes Enzymes are biological catalysts. Chemically all enzymes are globular proteins. Being proteins, they have colloidal nature and...
chemistry 12th class cbse notes

The Transition Elements (d-Block) – General Properties

 Properties of d-Block elements: Atomic Radii of d-Block elements: The atomic radii of the transition metals lie in-between those of s- and...