Q.2
Which carbon like electrons the most?
e- is negative, which carbon is more positive?
Q.1
Butanol is a primary alcohol, so the reaction favours which mechanism, SN1 or SN2?
This reaction is not feasible, as you need to protonate the hydoxyl group by adding an acid.
Water acts as a solvent.
Assume the reaction is feasible, water is a kind of polar molecules, if you know about which mechanism takes place, you will know what is the major product.