MCQ
Inversion of configuration observed :
- AIn $S _{ N } 1$ reaction
- BIn $S _{ N } 2$ reaction
- ✓Neither $S _{ N } 1$ nor $S _{ N } 2$ reaction
- DIn both $S _{ N } 1$ and $S _{ N } 2$ reaction
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$(I)$ Only compounds with chiral centers can be optically active
$(II)$ Absence of elements of symmetry is the reason for a molecule's optical activity
$(II)$ All organic compounds contain carbon & hydrogen
$(IV)$ Different cannonical forms of a molecule represent the actual structures of a molecule which has resonace in it
(Equilibrium constants for the reaction in water and benzene are $K_{Water}$ $K_{Benzene}$)

($F = 96,500\;C\;mo{l^{ - 1}}; \,\, R = 8.314\;J{K^{ - 1}}mo{l^{ - 1}})$
| List$-I$ (Oxoacids of Sulphur) | List$-II$ (Bonds) |
| $A$. Peroxodisulphuric acid | $I$. Two $S - OH$, Four $S = O$, One $S - O - S$ |
| $B$. Sulphuric acid | $II$. Two $S - OH$, One $S = O$ |
| $C$. Pyrosulphuric acid | $III$. Two $S - OH$, Four $S = O$, One $S - O - O - S$ |
| $D$. Sulphurous acid | $IV$. Two $S - OH$, Two $S = O$ |
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