In chromatography, which of the following statements is incorrect for R_f ?

The INCORRECT statement is :

The number of pentagons in C₆₀ and trigons (triangles) in white phosphorus, respectively, are :

For the reaction of H₂ with I₂, the rate constant is 2.5 × 10^–4 dm³ mol^–1s^–1 at 327°C and 1.0 dm³ mol^–1 at 527°C. The activation energy for the reaction, in kJ mole^–1 is : (R = 8.314 JK^–1 mol^–1 )