Which of the following reagents would distinguish $cis$-cyclopenta-$1,2$-diol from the $trans$-isomer?

Identify the product formed when $(R)-2-$butanol and $(S)-2-$butanol react with $(R,R)-$tartaric acid in an acidic medium.

Identify $Z$ in the reaction sequence: $CH_3CH_2CH_2Br$ $\xrightarrow{Aq. NaOH} X$ $\xrightarrow{Al_2O_3, \Delta} Y$ $\xrightarrow{Cl_2/H_2O} Z$

The rose odour from an ester is formed by the action of $HCOOH$ on

Consider the following reactions:
$X + HCl \xrightarrow{\text{Anhydrous } AlCl_3} C_2H_5Cl$
$Y \xrightarrow{\text{Anhydrous } ZnCl_2 / HCl} C_2H_5Cl$
$Y$ can be converted to $X$ on heating with which of the following reagents?

The reaction shown below is an example of:
$CH_2=CH-COOCH_3 + CH_3CH_2CH_2OH \xrightarrow{\text{Conc. } HCl} CH_2=CH-COOCH_2CH_2CH_3 + CH_3OH$