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Raw materials for the manufacture of cement are limestone, clay and gypsu..

Limestone and clay are the chief raw materials used in the manufacture of Portland cement. Limestone provides calcium oxide. Clay gives silica, alumina and ferric oxide. Note: If lime is in excess, the cement cracks during setting and if it is less, the cement is weak in str..

An organic compound with two amino (-NH 2 ) groups. An organic compound with two carboxylic (-COOH) groups. For example: Adipic acid [HOOC(CH 2 ) 4 .COOH] Hexamethylene diamine [H 2 N(CH 2 ) 6 .NH 2 ] The Nylon formed in this case is otherwise known as nylon-66 because each of the monomers contain..

Calcium carbonate and magnesium carbonate obtained from deposits of limestone, chalk, marble, dolomite, oyster shells, stalactites and stalagmites. Vertical or horizontal kilns are used to burn limestone. The kilns have steel shells line with refracting bricks. Calcium oxide or lime is prepared by ..

Sodium chloride - NaCl (brine solution) Ammonia - NH 3 Limestone - CaCO 3 (for carbon dioxide supply..

The nitrogen and hydrogen gases used as the raw material in Haber's process are obtained as follows. Nitrogen is obtained from the liquid air and hydrogen from water by electrolysis. Hydrogen may be obtained from water gas (mixture of CO and H 2 ) by Bosch process. Water gas can ..

Wheat, barley, rice, maize and potatoe..

Forms of biomass listed below may be used along with water: Animal dung Poultry wastes Plant wastes ( Husk, grass, weeds etc.) Human excreta Industrial wastes(Saw dust, wastes from food processing industries) Domestic wastes (Vegetable peels, waste food materials..

Raw Natural Rubber Vulcanized Natural Rubber Soft and sticky Comparatively hard and non-sticky Low tensile strength and not very strong High tensile strength and very strong Low elasticity High elasticity Can be used over a narrow range of temperature from 1..

Jessica scored less than 71 on a math test and her score is divisble by 3. What could be her score? => 48 or 81 or 52 or 44..