MCQ
Select the incorrect statement
- A$'Ne'$ is used in discharge tube
- BLiq. $'He'$ is used as a cryogenic agent
- ✓$'He'$ is inflammable gas and lighter gas.
- D$'Ar'$ used in a metallurgical process
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$(A)$ $\mathrm{Ni}(\mathrm{CO})_{4}$
$(B)$ $\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}$
$(C)$ $\mathrm{Na}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$
$(D)$ $\mathrm{PdCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}$