How many number of optically active isomers are possible for $2,3-$ dibromo butane $1,4-$ dioic acid ?
$2$
$3$
$4$
$1$
Which of the following will have a meso isomer also
Which compound is optically active
Which one of the following compounds shows optical isomerism
Which of the following is expected to be optically active
Explain following term :
$(a)$ Isomerism $(b)$ position isomerism $(c)$ chain isomerism $(d) $ functional group isomerism $(e)$ metamerism $(f)$ optical isomerism