a Distinguish between de placement and a
double displacement reaction. Explain the
examples.
by suggest two effective methods by which rancidity can be controlled
Answers
Answer:
A double displacement reaction is a type of chemical reaction where two compounds react, and positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products. For example, Na2S+2HCl→2NaCl+H2S.
A displacement reaction is the one wherein the atom or a set of atoms is displaced by another atom in a molecule. For instance, when Iron is added to a copper sulphate solution, it displaces the copper metal. A + B-C → A-C + B. The above equation exists when A is more reactive than B.
Rancidity can be prevented using the following methods: Adding antioxidants (substances which prevent oxidation) to food. Storing food in airtight containers to slow the process of rancidification. Refrigerating food also helps to slow down rancidification.
Lipid oxidation is one of the major reasons that foods deteriorate and is caused by the reaction of fats and oils with molecular oxygen leading to off-flavours that are generally called rancidity. ... The other cause of rancidity is by a combination of enzymes and moisture.
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Answer:
in a displacement reaction only 1 element is displaced but in double displacement reaction 2 elements are displaced