Question

What is meant by rancidity? List any two methods to prevent it. (b) Lead nitrate solution is added to a test tube containing potassium iodide solution. (i) Write the name and colour of the compound precipitated. (ii) Write the balanced chemical equation for the reaction involved. (iii) Name the type of this reaction by justifying your answer.​

Answer 1

Answer:

having a rank, unpleasant, stale smell or taste, as through decomposition, especially of fats or oils: rancid butter. (of an odor or taste) rank, unpleasant, and stale: a rancid smell.

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.

Replacing oxygen in the containers with another gas.