MCQ
Phenol at ${25\,^o}C$ is
- ✓A white crystalline solid
- BA transparent liquid
- CA gas
- DYellow solution
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the number of sigma and pi bonds respectively are
$[Co(NH_3)_6 ][Cr(NO_2)_6 ]$ and $[Cr(NH_3)_6][Co(NO_2)_6]$
$A$ and $B$ in the above atmospheric reaction step are.