The existence of one element in different forms, having different physical properties, but similar chemical properties is known as allotro...
Allowtropes of Carbon
on
Sunday, 14 July 2013
Occurance & Position of Carbon in periodic table
on
Carbon forms the largest number of compounds, next only to hydrogen. It ranks seventeenth in the order of abundance in the earth's crus...
Properties of Halogen
on
The halogens are the most reactive elements as a family. Fluorine is the most reactive of all the halogens. The reactivity of the halogens...
Preparation of halogen
on
Laboratory Preparation of Chlorine Any of the methods listed below, can be used to prepare chlorine in the laboratory. From concentrate...
Halogens-Position in periodic table
on
The elements placed in group 7 (VIIA) of the periodic table are called halogens or salt producers. All these elements form salts called ...
Test of Nitrate ion
on
A nitrate test is a chemical test used to determine the presence of nitrate ion in solution. A common nitrate test, known as the b...
Physical & Chemical Properties of Ammonia & Uses
on
Physical Properties of Ammonia Ammonia is a colorless gas. It has a pungent odor with and an alkaline or soapy taste. When inhaled ...
Saturday, 13 July 2013
Preparation of Nitric Acid
on
Nitric acid is prepared in large scale from ammonia and air. Reactants Pure dry ammonia (1 volume) and air (10 volumes) Reactions ...
Preparation of Ammonia
on
Ammonia (NH 3 ) is an important compound of nitrogen and hydrogen. It is produced by the natural decomposition of animal and vegetable bod...
Ammonia
on
Ammonia molecule has an electronegative nitrogen atom bonded to three hydrogen atoms. Differences in electronegativity between nitrogen an...
Uses of Nitrogen
on
1- Nitrogen is used in high temperature thermometers where mercury cannot be used. This is because mercury boils at 356.7oC and hence canno...
Position Of nitrogen in periodic table
on
Daniel Rutherford, a Scottish Physician, discovered nitrogen in 1772. But it was Lavoisier, who proved that nitrogen is an element and that...
Heavy water & its Uses
on
Preparation of heavy water:- Heavy water is prepared either by prolonged electrolysis or by fractional distillation of ordinary wate...
Structure of water
on
In the Earth's biosphere, water is essential to all forms of life. Interestingly, it is also the biospheres most abundant compound...
Ozone layer, Ozone Hole & Uses
on
Contrary to common misconception, Ozone is not in the form of thick layer surrounding atmosphere. Equally untrue is another misconception...
Ozone- Occurane Preparation & Structure
on
Ozone is an allotropic form of oxygen. Its molecular formula is O 3 and molar mass is 48 g mol - 1 . Schonbein (1840) concluded that Van M...
Uses of Oxygen
on
Respiration All air breathing animals and plants use oxygen present in air by the process of respiration. This is known as aerobic respi...
Position Of oxygen in periodic table
on
1. Oxygen is the first member of the group VIA and sulphur is the second member of the group VIA. 2. Other member of this group are sele...
Isotopes of Hydrogen
on
Hydrogen is the most abundant element in the universe. About half the mass of sun and stars is due to hydrogen. Jupiter and Saturn planets ...
Atomic & Nascent Hydrogen
on
Atomic Hydrogen Langmuir ,in 1915, obtained atomic hydrogen by dissociating on a hot filament of tungsten or platinum. The dissocia...
Hydrogen -Position in Periodic Table
on
Hydrogen is the first element of the periodic table. Its atomic number is 1, which indicates the presence of only one electron in the atom ...
Hund's Rule of maximum Multiplicity
on
According to this rule, electron pairing will not take place in orbitals of same energy (same sub-shell) until each orbital is first sing...
Atomic Structures
on
The text provides a historical perspective of how the internal structure of the atom was discovered. It is certainly one of the most import...
Friday, 12 July 2013
Periodic Table
on
Specification: Understand the terms group and period Recall the positions of metals and non-metals in the Periodic Table Explain the cl...
Monday, 8 July 2013
Basic Geometry
on
Basic geometry is the study of points, lines, angles, surfaces, and solids.The study of this topic starts with an understanding of these. L...
Saturday, 6 July 2013
S- block elements
on
1. Introduction:- (a) Elements of IA and IIA group of the periodic table are called s-block elements. (b) For these elements outer s-o...
Thursday, 4 July 2013
Mineral. Vitamins & Their Significance
on
Mineral Elements Sources Significance Effects of deficiency. Macro Elements Calcium(Ca) Milk, cereal...
Branches Of Science
on
DIFFERENT BRANCHES OF SCIENCE Branch Concerning field Aeronautics Science of fligt of airplanes. ...
Monday, 1 July 2013
Theorem-Vector Space
on
Statement:- The necessary & sufficient conditions for a non-empty subset W of a vector spaceV(F) to be a subspace of V are (...
Theorem-Vector Space
on
Statement- The necessary and sufficient condition for a non-empty subset W of vector space V is that a,bєF, α,βєW ⇨ aα+bβєW, ∀ a,...
Vector Space
on
Let F be an orbitrary field then a non-empty set V is called a vector space over the field F written as V(F) if following axioms...
Union Of Two Subspace
on
Statement:- The union of two subspace of a vector space is a subspace iff one each contained. Proof:- Let V be a vector s...
Range,Rank,Nullity Of A Linear Transformation
on
Range of a Linear Transformation:- Let U and V be two vector spaces over the field F.Let T be a linear transformation from U into V...
One-One & Onto Linear Transformation
on
One-one transformation:- Let T be a transformation from a vector space U into V then T is said to be one-one transformation if α ...
Null Space of a Linear Transformation
on
Let U and V be two vector spaces over the same field F and let T be a linear transformation from U into V. The null space of T is t...
Subscribe to:
Posts (Atom)