17
Account for the following :
(a) White silver chloride turns grey when exposed to sunlight.
(b) Lead (II) nitrate on heating releases brown fumes.
(c) Bags of oil and fat containing food items are flushed with nitrogen gas.
(a) White silver chloride turns grey when exposed to sunlight.
(b) Lead (II) nitrate on heating releases brown fumes.
(c) Bags of oil and fat containing food items are flushed with nitrogen gas.
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• $\ce{CaSO4.1/2H2O}$
u2022 373K / 100°C
Decomposition of silver chloride (AgCl) to form silver (Ag)
$\ce{2AgCl(s) ->[Sunlight] 2Ag(s) + Cl2(g)}$
Decomposition of lead nitrate releases $\ce{NO2}$ / Nitrogen dioxide
$\ce{2Pb(NO3)2(s) ->[Heat] 2PbO(s) + 4NO2(g) + O2(g)}$
(Lead nitrate) (Lead oxide) (Nitrogen dioxide) (Oxygen)
To prevent the oxidation of fats in food items.
u2022 373K / 100°C
Decomposition of silver chloride (AgCl) to form silver (Ag)
$\ce{2AgCl(s) ->[Sunlight] 2Ag(s) + Cl2(g)}$
Decomposition of lead nitrate releases $\ce{NO2}$ / Nitrogen dioxide
$\ce{2Pb(NO3)2(s) ->[Heat] 2PbO(s) + 4NO2(g) + O2(g)}$
(Lead nitrate) (Lead oxide) (Nitrogen dioxide) (Oxygen)
To prevent the oxidation of fats in food items.