InterviewSolution
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InterviewSolution
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CO, turns lime water milky becauseA. calcium hydroxide is formedC. Calcium carbonate is formedMolecular mass of CO, isA. 31...B. Calcium oxide is formedD. Calcium sulphate is formed2.B. 14C. 48D. 44A. Combustibility B. Heavier than airC. Soluble in water D. Odourless4. Dry ice is obtained from CO, at .temperA. 0B. -56.6C.-78.5D. -109.35. The Statement.is wrong regarding the use of CO.A. Ecofriendly drycleaningC. Fire extinguisherB. removal of caffene from coffeeD. Purificants in petrolium |
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Answer» 1)Carbon dioxide(CO2)turns lime water milky due tothe formation of insoluble calcium carbonate, CaCO3. Sulphur dioxide (SO2) also does the same, but slowly, as it reacts withcalcium hydroxideto form insoluble calcium sulphite. 2) (12) + 2(16) = 44 4)Dry ice is frozencarbondioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly intocarbondioxide gas rather than a liquid. |
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