What is ethanol containing a small amount of methanol called?

Which of the following is the most suitable method for removing the traces of water from ethanol?

An alcohol $X$ $(C_4H_{10}O)$ does not give turbidity with conc. $HCl$ and $ZnCl_2$ at room temperature. $X$ on reaction with reagent $Y$ gives $Z$. What are $X, Y$ and $Z$ respectively?

Maximum solubility of alcohol in water is due to

Absolute alcohol ($100\%$ alcohol) is prepared by distilling rectified spirit over:

In the Victor-Meyer's test,the colours given by $1^o$,$2^o$,and $3^o$ alcohols are respectively: