Addition of $Br_2$ to $trans-2-butene$ would give a product which is

For which of the following reactions is the anti-Markovnikov addition most suitable?

Which of the following statements is correct about $1, 3-$butadiene?

Consider the following reactions:
$X + HCl \xrightarrow{\text{Anhydrous } AlCl_3} C_2H_5Cl$ (Addition)
$Y \xrightarrow{\text{Anhydrous } ZnCl_2 / HCl} C_2H_5Cl$ (Substitution)
$Y$ can be converted to $X$ on heating with $...$ at $...$ temperature:

What is the major product of the following reaction?
$CH_2=CH-CH=CH_2 + Br_2 \text{ (1 eq)} \xrightarrow{\Delta} ?$

The product $A$ of the following reaction is:
$R_2C=CHR' \xrightarrow[Zn/H_2O]{O_3} A$