Before refrigeration became available, the preservation of eggs was done by dipping them in a concentrated aqueous solut

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Before Refrigeration Became Available The Preservation Of Eggs Was Done By Dipping Them In A Concentrated Aqueous Solut 1 (126.29 KiB) Viewed 47 times

Before refrigeration became available, the preservation of eggs was done by dipping them in a concentrated aqueous solution of sodium orthosilicate, Na SiO4, made according to the step (i) in the box. The soft eggshell of calcium carbonate, porous to air, is then replaced in step (ii) by a tough impervious layer of calcium silicate. Which one choice CORRECTLY describes one of these reactions? 1. SiO2(s) + 2 Na2CO3(1)→ Na2SiO4(s) + 2 CO2(g) ii. 2 CaCO3(s) + Na SiO4(ag) + CazSiO4(s) + 2 Na2CO3(aq) + O a. Siis reduced in reaction (). Ob Nais oxidized in reaction (1) OC None of these reactions is a redox reaction Od Cis oxidized in reaction (). O e SiO2 is the oxidizing agent in reaction (1). Ге