Question

(a) explain two ways by which food industries prevent rancidity.(b) write down the decomposition reaction in prespective of -(1)thermal (2)sunlight (3)electricity​

Answer 1

Answer:

ANSWER a) -- 1】Adding anti-oxidants to foods containing fats and oils. 2】By packaging fat and oil containing foods in nitrogen gas. 3】By keeping food in a refrigerator. 4】By storing food in air- tight containers.

thermal - CaCo3 -------- Cao + Co2

sunlight - 2AgCl --------- 2Ag + Cl2

electrolysis - 2H2o ------- 2H2 + O2

Answer 2

Answer:

(A) 1】Adding anti-oxidants to foods containing fats and oils. 2】By packaging fat and oil containing foods in nitrogen gas. 3】By keeping food in a refrigerator. 4】By storing food in air- tight containers.

• (B) Thermal decomposition, or thermolysis, is a chemical decomposition caused by heat. The decomposition temperature of a substance is the temperature at which the substance chemically decomposes. The reaction is usually endothermic as heat is required to break chemical bonds in the compound undergoing decomposition. If decomposition is sufficiently exothermic, a positive feedback loop is created producing thermal runaway and possibly an explosion or other chemical reaction

Explanation:

• Silver Nitrate is very sensitive to light. This means, that the chemical will react when exposed to light. So, when this is left exposed to sunlight or any bright light, it will start to hydrolyze. This will result in the formation of black or brown colored silver oxide and nitric acid.
• A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.