MCQ
The solid phosphorous pentachloride exists
- A$PCl_5$
- B$PCl_4 ^+ \,Cl^-$
- C$PCl_6^-$
- ✓$PCl_4^+\, PCl_6^-$
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$(V=33\, volt)$ $(m_p = 1.672 \times 10^{-27} \,kg)$


(molar mass, $NaCl = 585\,g\,mol^{-1}$ )