Which from following statements is NOT true for phenol?

In carbinol system, sec-Butyl alcohol is named as

Calculate the number of unit cells in $1 \mathrm{~cm}^3$ volume of metal if unit cell edge length is $1.25 \times 10^{-8} \mathrm{~cm}$.

Calculate the number of moles of nonvolatile solute dissolved in 0.5 kg solvent if molal elevation constant for solvent is $2 \mathrm{~kg} \mathrm{~K} \mathrm{~mol}^{-1} \left[\Delta \mathrm{T}_{\mathrm{b}}=0.8 \mathrm{~K}\right]$