MCQ
Spiegeleisen is an alloy of
- A$Cu + Zn + Ni$
- B$Ni + Cr$
- ✓$Mn + Fe + C$
- D$Fe + Cr + Ni$
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${C_2}{H_5}ONa + I{C_2}{H_5}\xrightarrow{{}}{C_2}{H_5}O{C_2}{H_5} + NaI$
$(1)$ Ligands are connected to the central metal ions by covalent bonds.
$(2)$ Secondary valencies have directional properties
$(3)$ Secondary valencies are non-ionisable Of these statements

What will be $B$ ?