Question

To confirm the presence of fat in ground nut seeds.​

Answer 1

Answer:

Rub a piece of groundnut against a paper carefully without tearing it. After drying the paper, an oily patch is observed which confirms the presence of fats.

Explanation:

Test For Fats

The presence of fats in a sample can be detected by the following tests:

Sudan III Test

Paper Spot Test

1. Sudan III Test

Materials Required

Sudan III Solution

Oil

Test tube

Dropper

Egg Albumin

Procedure

Take a clean and dried test-tube and add a few drops of oil into it.

Now into the same test tube, add five to six drops of the Sudan III reagent with the help of a dropper.

Stir the test tube continuously and allow the solution to stand for a while.

After a few seconds, observe the changes.

Observation

The presence of fat in the sample is indicated when pink colour droplets appear on the test tube.

2. Paper Spot Test

Materials Required

A piece of white paper

Peanut seeds

Watch glass

Procedure

On the piece of white paper, place the fresh peanut seeds.

Crush and rub the peanut seeds in the white paper.

Remove the peanut seed remaining on the watch glass.

Observe the changes on the piece of white paper.

Observation

The spot where the peanut seeds are rubbed turns translucent. This indicates the presence of fats in the sample

Answer 2

Answer:

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Explanation:

Answer: Rub a piece of groundnut against a paper carefully without tearing it. After drying the paper, an oily patch is observed which confirms the presence of fats.