Consider the following statement (a) In fire extinguisher use of baking soda. (b) Slaked lime is use in production of glass. (c) Gypsum is use in production of plaster of paris. Choose correct answer.
(4) Baking soda as a fire retardant. Baking soda is chemically known as sodium bicarbonate. When heated to a high temperature, the chemical properties of this salt make it produce lots of carbon dioxide and remove oxygen. This then totally reduces the amount of oxygen in the surrounding atmosphere and puts the fire out. Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula · . It is widely mined and is used as a fertilizer, and as the main constituent in many forms of plaster, blackboard chalk and wallboard. Soda-lime glass, also called soda-lime-silica glass, is the most prevalent type of glass,used for windowpanes and glass containers (bottles and jars) for beverages, food, and some commodity items. Glass bakeware is often made of tempered soda-lime glass. Soda-lime glass accounts for about 90% of manufactured glass. Soda-lime glass is prepared by melting the raw materials, such as sodium carbonate (soda), lime,dolomite, silicon dioxide(silica), aluminium oxide(alumina), and small quantities of fining agents(e.g., sodium sulfate, sodium chloride) in a glass furnace at temperatures locally up to 1675 °C.