Crystallisation, Distillation, Chromatography — Prelims Questions

Which of the following purification techniques is most suitable for separating a mixture of two liquids with boiling points $90^\circ\text{C}$ and $92^\circ\text{C}$?

In thin-layer chromatography (TLC), a compound travels $3.5\,\text{cm}$ from the origin, while the solvent front travels $7.0\,\text{cm}$. What is the $R_f$ value of the compound?

Which of the following statements about crystallisation is INCORRECT?

Which type of distillation is most suitable for purifying a liquid that decomposes at its normal boiling point of $250^\circ\text{C}$?

In column chromatography, which statement accurately describes the movement of components?

Which of the following is NOT a characteristic of an ideal solvent for crystallisation?