RAS PDF and Printed Notes for RAS Prelims and Mains Exam
Addition of certain substances to the water such as organic, inorganic, biological, radiological, heat, which degrades the quality of water so that it becomes unfit for use. Putrescibility is the process of decomposition of organic matter present in water by microorganisms using oxygen. Water having DO (dissolved oxygen) content below 8.0 mg/L may be … Read more
Limestone M.P, Chattisgarh, Andhra Pradesh, Rajasthan Dolomite Orissa (Birmitrapur in Sundergarh District-largest in India), M.P & Chattisgarh Phosphate Rajasthan (Udaipur) Uttaranchal (Dehradun), M.P. (Jhabua), U.P. (Lalitpur) Kaolin Kerala is largest producer. Mica Andhra Pradesh, Jharkhand (Kodarma-Large) & Rajasthan Gypsum Rajasthan & J & K. Steatite Rajasthan. It is also called soapstone/ Potstone. Magnesite Tamil Nadu … Read more
Electrochemistry Electrochemistry is the study of production of electricity from energy released during spontaneous reactions and the use of electrical energy to bring about non-spontaneous chemical transformations. Electrochemistry is the study of chemical processes that cause electrons to move. This movement of electrons is called electricity, which can be generated by movements of electrons from … Read more
Petroleum, natural gas, coal, nitrogen, uranium and water power are examples of conventional sources of energy. They’re also called non-renewable sources of energy and are mainly fossil fuels, except water power. Rising growth of population has created a tremendous pressure on the conventional resources of energy and thus the concept of sustainable development get prominent … Read more
Intelligence(Cognitive; Emotional; Social; Cultural; Multiple) Cognitive Intelligence Cognition: Mentally processing information (images, concepts, etc.); thinking Intelligence: It is the ability to process data into more efficient systems by acquiring learned substantive mental methods which develops into cognitive ability. Cognitive intelligence is the ability to plan, reason, and use logical deduction to solve problems, but also … Read more
The economic consequences of the British rule can be studied under three heads: Decline of Indian Handicrafts and progressive ruralisation of the Indian economy Growth of the new land system and the commercialisation of Indian agriculture Process of industrial transition of India Decline of Handicrafts While India was an exporter of Handicrafts before the … Read more
Marketing involves a number of activities. To begin with, an organisation may decide on its target group of customers to be served. Once the target group is decided, the product is to be placed in the market by providing the appropriate product, price, distribution and promotional efforts. These are to be combined or mixed … Read more
Trade is known as the exchange of commodities and services. Prosperity of a State/Nation depends on the Balance of Trade. Trade play an important role in the development of the state and is dependent on several factors such as:- Means of Communication Education and Literacy level in the society Transport Network Surplus Production Diversity … Read more
Based on the value addition and tangibility broadly we can have three types of industries – primary industries,secondary industries and tertiary industries. Primary industries are usually very simple industries involving processing of raw materials to give input goods for secondary industries. Here value addition is usually minimal and they are usually material oriented.Scale of … Read more
The elements or mineral nutrients are always in circulation moving from non-living to living and then back to the non-living components of the ecosystem in a more or less circular fashion. This circular fashion is known as biogeochemical cycling (bio for living; geo for atmosphere). Nutrient Cycling: The nutrient cycle is a concept that describes … Read more
