Which of the following is most likely to show optical isomerism
$HC \equiv C - \mathop {\mathop C\limits_|^| - }\limits_{Cl\,}^{H\,} C \equiv CH$
$HC \equiv C - \mathop {\mathop C\limits_|^| }\limits_{Cl}^H - C{H_3}$
$HC \equiv C - \mathop {\mathop C\limits_|^| }\limits_{Cl}^H - H$
$HC \equiv C - \mathop {\mathop C\limits^| }\limits^{Cl} = C{H_2}$
Total number of optically active compounds from the following is. . . . . .
How many different stereoisomers are possible for the following compound ?
$\begin{array}{*{20}{c}}
H\\
|\\
{ClHC = HC - C - CH = CHCl}\\
|\\
{Cl}
\end{array}$
A pair of stereoisomers might be classified in various ways. Which of the following statement are true with respect to pairs of stereoisomers?
$(a)$ They might be configurational isomers $(b)$ They might be diastereomers
$(c)$ They might be constitutional isomers $(d)$ They might be tautomers
$(e)$ They might be conformational isomers $(f)$ They might be enantiomers
$(g)$ They might be positional isomers
Chiral molecule is
A solution of optically active $1$ -phenylethanol racemizes in acidified aqueous medium. It is due to