MCQ
The elements belonging to the first transition series have atomic number from
- A$19$ to $ 37$
- B$22$ to $32$
- C$24$ to $30$
- ✓$21$ to $30$
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$X$ and $Y$ are
$(a)\,0.075\,\,M\,CuS{O_4}$ $(b)\,0.060\,\,M\,(NH_4)_2SO_4$
$(c)\,0.14\,\,M\,urea$ $(d)\,0.04\,M\,MgCl_2$