MCQ
The electronic structure $(n - 1)\,{d^{1 - 10}}n{s^{0 - 2}}$ is characteristic of
- ✓Transition elements
- BLanthanides
- CActinides
- DRare gases
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$(K_f =-1.86\,^o\,C/m)$
$(A)$ $H _2 S _2 O _7$ $(B)$ $H _2 S _2 O _8$ $(C)$ $H _2 S _2 O _5$ $(D)$ $H _2 SO _5$