Question

Question 12
A sample of ink is put in the centre of a circle of filter paper. Several drops of ethanol are then put on the ink
mark. Two concentric rings of colour are obtained. What is the best conclusion about the ink we can come
to? (→ the right answer)
(A) It contains two coloured substances only.
(B) It is a compound.
(C) It contains at least two coloured substances.
(D) It is broken down by ethanol.
12​
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Answer 1

Explanation:

When you dip the paper in water, the dried pigments dissolve. As the water travels up the paper, it carries the pigments along with it. ... Since the water carries the different pigments at different rates, the black ink separates to reveal the colors that were mixed to make it.

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