MCQ
In which of the following species the bonds are non-directional?
- A$NCl_3$
- ✓$RbCl$
- C$BeCl_2$
- D$BCl_3$
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Which of these structures is practically not a valid canonical structure for formaldehyde ?

(figure) $\xrightarrow[CC{{l}_{4}}]{B{{r}_{2}}}(A)\xrightarrow[(ii)\,NaN{{H}_{2}}]{(i)\,alc.\,KOH}(B)\xrightarrow[(ii)\,C{{H}_{3}}-Cl]{(i)\,NaN{{H}_{2}}}(C)$