Which of the following nucleophiles is the most reactive?

The order of reactivity of the following alcohols toward $HCl$ is:
$(1)$ $F-CH_2-CH_2-CH(OH)-CH_3$
$(2)$ $F-CH_2-CH_2-CH_2-CH(OH)-CH_3$
$(3)$ $CH_3-CH(OH)-CH_3$
$(4)$ $Ph-CH_2-CH_2-OH$

Which one of the following is a secondary alcohol?

Which of the following is not a characteristic of alcohols?

$CH_3-CH_2-CH=CH_2$ $\xrightarrow[CCl_4]{HCl} X$ $\xrightarrow{Aq. NaOH} Y$ $\xrightarrow[\Delta]{Conc. H_3PO_4} Z$
The major product $Z$ is:

The major product of the following reaction is: $CH_3CH(OH)CH_3 \xrightarrow{Cu, 573 \ K} ?$