1.Define nuclear fission. Give an example. Ans: Nuclear fission is the process of splitting of a heavy nucleus into two lighter nuclei of nearly comparable masses with release of energy. Example: Fission of U-235 by neutrons. 2...
Tag - Chemistry
1. What is a paint? Ans. Paints is a viscous, opaque, mechanical dispersion mixture of one or more colouring matter called pigment in a dry oil called vehicle. 2. What are the characteristics of a good paint? Ans. It has high...
1. What is corrosion ? Give examples. Ans. Corrosion is the destruction or deterioration of metals or alloys as a result of chemical or electrochemical reaction with its environment. The well-recognised example of corrosion is...
1. What are electrochemical cells ? Ans. It is an electrochemical device, which converts electrical energy into chemical energy (electrolytic cells) or chemical energy into electrical energy (galvanic cells). 2. Differentiate...
1. Define soft water and hard water. Ans: Soft water : Water which forms lather easily and readily with soap is called soft water. Hard Water : Water which does not produce lather with soap readily but forms an insoluble...
The calorific value of a fuel can be calculated from the sum of the calorific values of the constituent gases. According to Dulong, the calorific value of fuel is the sum of the calorific values of its constituent elements. The...
Calorific value of fuels Calorific values is defined as “the amount of heat liberated in calories by the complete combustion of the fuel with oxygen and the product of combustion to the desired temperature. Calorific value...
introduction Combustion is a chemical reaction in which a combustible substance burns in air and produce heat and light. This process of heat production is called combustion. Combustion is an exothermic chemical reaction For...
Power alcohol Introduction Alcohol used for the generation of power is called power alcohol. Absolute acohol ( 100% ethyl acohol) and rectified spirit ( 93−95% ethyl alcohol) are not used as prime fuels but they are...
CNG (Compriessed Natural Gas) Compressed Natural Gas CNG is a special form of natural gas. CNG is a substitute for petrol (or) Diesel fuel. Since it is comparatively much less polluting fuel. During its combustion, no sulphur...
