MCQ
Which compound is a secondary alcohol?
- AButan $- 1- ol$
- ✓Butan $- 2 - ol$
- CIsobutyl alcohol
- D$2 -$ Methylpropan $- 2 - ol$

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$2 \mathrm{H}_{2}(\mathrm{g})+2 \mathrm{NO}(\mathrm{g}) \rightarrow \mathrm{N}_{2}(\mathrm{g})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{g})$
the observed rate expression is, rate $=\mathrm{k}_{\mathrm{f}}[\mathrm{NO}]^{2}\left[\mathrm{H}_{2}\right] .$ The rate expression of the reverse reaction is