Question

1. concerning chromatography, why do different colors in the ink separate?

because the colors are made of different pigments that move at different speeds through the pape
because the paper chemically reacts with each color to change it
because the ink is heated and melts into different parts
because each color has a different magnetic charge

1. which color had the greatest affinity for water?

pink
blue
red
yellow

Explanation:

Chromatography separates substances based on their interaction with the mobile phase (like water) and stationary phase (like paper). Different pigments in ink have different affinities for water and paper. The one with higher affinity for water (mobile phase) moves faster. In chromatography, the color that moves the farthest (assuming standard setup) has the greatest affinity for water. Usually, yellow moves relatively faster in some common ink - water - paper chromatography setups.
For question 3:

• Option 1: Different pigments (components of ink) have different interactions with paper (stationary phase) and water (mobile phase). Pigments that interact less with paper and more with water move faster, causing separation. This is the correct principle of chromatography.
• Option 2: Paper does not chemically react with ink colors in chromatography (a physical separation method).
• Option 3: Ink is not heated in simple paper chromatography (it is a room - temperature separation based on solubility and adsorption).
• Option 4: Magnetic charge is not a factor in ink - paper - water chromatography (separation is based on solubility and adsorption).

For question 4:
Assuming a standard chromatography experiment (where yellow often has a relatively high affinity for water compared to pink, blue, and red in some common inks), yellow is the answer.

Answer:

1. Because the colors are made of different pigments that move at different speeds through the pape
2. yellow