4 A purple food colouring extracted from a cotton candy was placed at the centre of
13 a plece of filter paper marked \( \mathbf{P} \). Drops of ethanol were added at \( \mathbf{P} \)
Fig. 4.1 shows the result after 45 minutes.
Fig. 4.1
(a) Name the separation method shown in Fig. 4.1.
\( \qquad \)
(b) Identify the solvent used in Fig. 4.1.
[1]
\( \qquad \)
(c) Fig. 4.2 shows another way the separation method can be performed for
[1] the purple food colouring extract.
Fig. 4.2
Identify the colour of dye \( \mathbf{R} \).
\( \qquad \)
[1]