Notes and Study material for Exams
First World War Background It was a result of growing inter-imperialist rivalries, growing chauvinism, antagonism and conflicts within Europe, formation of alliances and secret pacts, growing militarization, feverish preparations for war, were some of the marked features that harbingered war. There had been a number of crises which were temporarily resolved, but led to deep … Read more
Preparation of nitrogen Nitrogen is found in both free and combined states. It occupies 78.07% by volume. Nitrogen can be prepared: By heating copper in air: Firstly, air is passed through lime water and then concentrated sulphuric acid to make the air free from carbon dioxide and moistures respectively. The air contains only nitrogen and … Read more
Preparation of hydrogen Hydrogen is the most abundant element in the universe. The sun and other stars are composed largely of hydrogen. Astronomers estimate that 90% of the atoms in the universe are hydrogen atoms. Hydrogen is a component of more compounds than any other element. Water is the most abundant compound of hydrogen found … Read more
Corrosion is defined as an attack on a material as a result of chemical, frequently electrochemical reaction, with the surrounding medium. According to this definition, the term corrosion can be applied to all materials, including non-metals. But in practice, the word corrosion is mainly used in Conjunction with metallic materials. Why do metals corrode? Apart … Read more
ENZYMES Enzyme, a substance that acts as a Catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes. Without enzymes, many of these reactions would not take place … Read more
Each organism is different from other organisms. The total number of species living on the planet is imprecisely known and published estimates vary from 12 million to over 100 million. This is because there are large numbers of species yet undiscovered and undescribed, and there is not always agreement on whether certain organisms should … Read more
Control of Pests and crop Disease agriculture is the single largest sector of India that provides the principal means of livelihood for over 58.4% of country’s Population. It contributes approximately one-fifth of the total gross domestic product (GDP). Agriculture accounts for about 10% of the total export earnings and provides raw material to a large … Read more
The history of disasters in Karnataka reveals that a series of various types of disasters that have struck the State over the years with devastating effects. Years 2005 and 2006 have seen devastating floods in the Districts of Gulbarga, Belgaum, Bijapur, Bidar, Bagalkot, Raichur etc., as a result of outflow of excess water from … Read more
Fisheries. Education and awareness. Education and awareness are essential for conserving biodiversity. People need to understand the importance of biodiversity and the threats it faces in order to take action to protect it. Policy and regulation. Policy and regulation can also play a role in conserving biodiversity. Governments can pass laws that protect biodiversity and … Read more
The Rate of a Chemical Reaction can be defined as the amount of the reaction which occurs in unit time. The rate of a reaction is measured by choosing certain properties of the reaction which will indicate how far the reaction has gone, and whose magnitude can be observed with time without disturbing the reaction. … Read more