Rancidity

Q. What do you understand by rancidity? How can we reduce the problem of rancidity?

Q.

Oil and Fat containing food items are flushed with Nitrogen. Why?

Q.

The potato chips manufacturers uses___gas to flush the chips bags to prevent the chips from getting oxidized.

Q.

What is rancidity?

Q.

What if we drink liquid nitrogen?

Q. Question 20.2

Explain the following term with one example: Rancidity.

Q. Which one of the following will help to prevent rancidity of food containing fats and oil?

1. By keeping food in refrigerator
2. By keeping food in sunlight
3. By packing food materials in atmosphere of carbon dioxide
4. By leaving food in open place unpacked

Q. In Kjelalahs method the gas evolved from 1.325g of nitrogen fertilizer is passed into 50.00ml of 0.2030N H2SO4, 25.32ml of 0.1980of N NaOH are required for titration of unused acid .Calculate the percentage of nitrogen

Q.

uses of nitrogen dioxide

Q. Assertion :Oil and fat containing food items are flushed with nitrogen. Reason: Nitrogen acts as an antioxidant and it prevent them from being oxidised.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

The oxidation of oils & fats causes a change in the taste and flavour of food items. This phenomenon is called-

1. Rancidity
2. Reduction
3. Displacement reaction
4. Decomposition

Q.

Which one of the following gas is used to prevent rancidity while packing oil foods?

1. Carbon dioxide

2. Oxygen

3. Fluorine

4. Nitrogen

Q.

The aerial oxidation of butter, leading to its unpleasant smell and taste, is called _______________.