Which of the following elements does not react with water to form metal hydroxide?

Identify the major product formed when 2-Methylhexan-3-ol is heated with concentrated sulphuric acid.

What is the highest oxidation state of third row transition elements?

Calculate the solubility of sparingly soluble salt BA in $\mathrm{mol} \mathrm{dm}^{-3}$ at 300 K if its solubility product is $4.9 \times 10^{-9}$ at same temperature.