MCQ
The molecule/ion with square pyramidal shape is:
- A$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$
- B$\mathrm{PCl}_5$
- ✓$\mathrm{BrF}_5$
- D$\mathrm{PF}_5$

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$2MnO_4^ - + 10{I^ - } + 16{H^ + } \to 2M{n^{2 + }} + 5{I_2} + 8{H_2}O$
The rate of appearance $I_2$ is......$\times {10^{ - 2}}\,M{s^{ - 1}}$
Statement $-I :$ Retardation factor $\left( R _{ f }\right)$ can be measured in meter/centimeter.
Statement $-II :$ $R _{ f }$ value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below