MCQ
is


- A

- ✓

- C

- D







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${K_2}Cr_2{O_7}/{H^ + } + y \to \mathop {C{r^{ + 3}} + Others}\limits_{(green)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} $
[Given : Molal elevation constant of water $K _{ b }=0.5\, \,K\, kg\, mol ^{-1}$ boiling point of pure water $\left.=100^{\circ} C \right]$
$(I)$ $TeF_6$ $(II)$ $SF_6$ $(III)$ $NCl_3$ $(IV)$ $NF_3$
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