MCQ
Coinage metals are present in
- A$s-$ block
- ✓$d-$ block
- C$p-$ block
- D$f-$ block
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(At. No. $Cr = 24, Mn = 25, $$Fe = 26, Ni = 28$)
$(i)$ Hinsberg test
$(ii)$ Carbyl amine test
$(iii)$ Hofmann mustard oil test
$(iv)$ $HNO_2$ test