Question

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Give a test that can be used to differentiate between butter and cooking oil.​

Answer 1

Answer:

We can also distinguish chemically between a cooking oil and a butter by the bromine water test. Cooking oil decolourises bromine water showing that it is an unsaturated compound. Butter does not decolourises bromine water showing that it is a saturated compound

Explanation:

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Answer 2

Answer:

Butter is saturated in nature while cooking oil is unsaturated hydrocarbon. This means that cooking oil has at least C=C bond present in the constituting compounds while water does not have any such bond. The distinction between them can be made by reacting with bromine water or bromine dissolved in carbon tetrachloride. Cooking oil will discharge the yellow colour of bromine while butter will not discharge the yellow colour of bromine. This is about the test that can be used to differentiate between butter and cooking oil.