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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$Zn\left( s \right) + C{u^{2 + }}\left( {aq} \right) \rightleftharpoons Z{n^{2 + }}\left( {aq} \right) + Cu\left( s \right)$
Standard reaction enthalpy $\left( {{\Delta _r}{H^ - }} \right)$ ....... $\mathrm{kJ}$