Final answer:
Compound Y with an RF value of 0.25 will travel 1 cm from the origin when the solvent has traveled 4 cm.
option d is the correct
Step-by-step explanation:
The student asked how far compound Y would have traveled from the origin if it has an RF value of 0.25 when the solvent front has traveled a distance of 4 cm. To answer this, we use the RF value, which is the ratio of the distance traveled by the compound to the distance traveled by the solvent. Therefore, if the solvent travels 4 cm, compound Y would have traveled:
Distance traveled by compound Y = RF value × Distance traveled by solvent front
Distance traveled by compound Y = 0.25 × 4 cm
Distance traveled by compound Y = 1 cm
The correct answer is thus (a) 1 cm, where compound Y would have traveled 1 cm away from the origin after the solvent has traveled 4 cm.