1.When the ink dries, the pigment remains on the paper. When you dip the paper in water, the dried pigments dissolve. ... Since the water carries the different pigments at different rates, the black ink separates to reveal the colors that were mixed to make it.

2.Chromatography - Separation techniques. Chromatography separates soluble substances in a mixture, sometimes to analyse the mixtures. Method: ... At hospitals, chromatography can be used to find out if a person has diabetes by using the technique to find out how much sugar is present in their urine.

3.The smell or appearance of water can also indicate water pollution. Water contaminated with sulfur or certain bacteria will emit the smell of rotten eggs. High iron levels give water an orange color. ... Water that smells like chemicals, gas, or paint thinner are likely polluted with those contaminant byproducts or others.

4.This experiment is done to check the movement of water in stem in which ink is mixed with water and the stem is left in the mixture and after an hour we observe the stem and it shows that the ink is present inside the stem shows that the stem conducted the water and the ink, as well as the colored ink patches, are observing it proves that the xylem and its elements help stem to conduct the water.

This experiment is done to check the movement of water in stem in which ink is mixed with water and the stem is left in the mixture and after an hour we observe the stem and it shows that the ink is present inside the stem shows that the stem conducted the water and the ink, as well as the colored ink patches, are observing it proves that the xylem and its elements help stem to conduct the water.So the correct option is 'The conduction of water and ink by the stem'

5.Color does not depend on the distance to the object. This should be familiar to you from everyday experience. The color of a traffic signal, for example, appears the same no matter how far away it is.