From the given compounds $(A)$,$(B)$,$(C)$,and $(D)$,which one is chiral?

Which of the following compounds is chiral but does not contain a chiral carbon?

Identify the correct sequence for True and False.
$(I)$ Only compounds with chiral centers can be optically active.
$(II)$ Absence of elements of symmetry is the reason for a molecule's optical activity.
$(III)$ All organic compounds contain carbon $\&$ hydrogen.
$(IV)$ Different canonical forms of a molecule represent the actual structures of a molecule which has resonance in it.

The maximum number of possible isomers (including stereoisomers) which may be formed on mono-bromination of $1-$methylcyclohex$-1-$ene using $Br_2$ and $UV$ light is. . . . . .

After prolonged treatment of $(A)$ by $D_2O/DO^-$, the difference in molecular weights of compounds $(A)$ and $(B)$ is:

Which of the following compounds has a center of symmetry?