Science Tech

Indian Space Research Organization (ISRO) Indian Space Research Organisation (ISRO), was founded in 1969 to develop an independent Indian space program. Its headquarters are in Bangalore. ISRO’s chief executive is a chairman, who is also chairman of the Indian government’s Space Commission and the secretary of the Department of Space. The Indian Space Research Organisation … Read more

 Matter in our surroundings, Elements, Compounds, Mixtures Matter is any thing which has mass and occupies space. All solids, liquids and gases around us are made of matter. Scientist believe that matter is made of tiny particles that clump together. You cannot see these particles but you can see the matter, for example, … Read more

   QUICK REVISION: Art 4, Institutional structure for Nuclear energy:   ATOMIC ENERGY COMMISSION: Governing body of the department of Atomic energy It is directly under the charge of the Prime Minister Set up on 10Aug, 1948 Function: Organise research in atomic science To train atomic scientist in the country To promote nuclear … Read more

 Surface tension Surface tension, property of a liquid surface displayed by its acting as if it were a stretched elastic membrane. This phenomenon can be observed in the nearly spherical shape of small drops of liquids and of soap bubbles. Because of this property, certain insects can stand on the surface of water. … Read more

 Slow reactions Chemical reactions that occur very slowly and can take a long time for completion are called slow reactions.  Usually covalent compounds are involved in slow reactions.Some reactions can take days, weeks and months to complete; they are called very slow reactions.For example, Milk may take several hours or a day to convert to curd, while it … Read more

 Value Addition by Science & Technology- Current Science & Technology developments in India Science and Technology hold the key to the progress and development of any nation. Technology plays a Fundamental role in wealth creation, improvement of the quality of life and real economic growth and transformation in any society. The role of … Read more

 Acid An acid is a substance which forms H+ ions as the only positive ion in aqueous solution. Examples:- Hydrochloric acid dissolved in water forms H+ and Cl– ions   HCl —> H+ + Cl–   Sulphuric acid dissolved in water forms H+ and SO42- ions   H2SO4 —>2H+ + SO42-   Nitric acid forms H+ and NO3– ions when dissolved in water … Read more

Periodic Table  and periodicity Criteria for a new element discovery Assessing if an element has been “discovered” is not a simple task. While reviewing the discovery profiles of the transfermium elements in the early 90s’, IUPAC and IUPAP set up to establish a series of criteria that must be satisfied for the discovery of an … Read more

 Conductors, semiconductors and insulators Materials are classified as conductors, insulators, or semiconductors according to their electric conductivity. The classifications can be understood in atomic terms. Electrons in an atom can have only certain well-defined energies, and, depending on their energies, the electrons are said to occupy particular energy levels. In a typical atom … Read more

 Thermal effect of current it’s use, calculation of power and electrical energy Spent When an electric current flows through a conductor, electrical energy is expended n over coming the frictional resistance between eh electrons and the molecules of the wire. If potential difference of V volts is applied across a conductor and current … Read more