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Bakelite is a material based on the thermosetting phenol formaldehyde resin. Produced by the reaction under heat and pressure of phenol (a toxic, colourless crystalline solid) and formaldehyde (a easy organic compound), generally with a wood flour filler, it was the first plastic made from synthetic components. It was used for its electrically nonconductive and heat-resistant properties in radio and telephone casings and electrical insulators, and was also used in like as diverse products as kitchenware, jewellery, pipe stems, and children's toys.
to determine the emf of cell uaing pottentiometre
what are the merits and demerits of free radical
Salient properties of common semiconducting materials. The salient properties of semi-conducting materials are: These are the materials whose valence electrons are bound
Saponification number: Saponification number of oil is the number of milligram of potassium hydroxide required to saponify 1 g of oil. Mineral oils are the mixture of hydrocarbons
A sample of water is found to contain , Temporary Mg hardness = 20mg/L,Calcium Sulphate =20 mg/L. Calculate Temporary and Pemanent hardness in water.
Thermal spelling: The breaking or cracking or peeling off the refractory is known as spelling. A good refractory must show a good resistance to thermal spelling. Thermal spelling
Requisites of refractory material or essential requirements of good refractory: a. It should be able to withstand high temperature. The appropriate refractory is chose
What is the basis of classification of hot and cold working? Cold and hot working: Changing the shape of material by extrusion, forging, rolling, and drawing include plastic
What are the applications of polymers in electrical and electronics industries>
What kind of separation processes are there?
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