Question

Write structural isomer of c4h10o cannot be dehydrogenated by copper at 575k

Answer 1

The only isomer of $\mathrm{C_4H_{10}O}$ which cannot be dehydrogenated by $Cu$ at $575K$ is t-butanol, because it is the one which is tertiary.
$\begin{aligned} &OH&\\ &\ |&\\ CH_3-&C-&CH_3\\ &\ |&\\ &CH_3& \end{aligned}\\ \text{tert-butanol}$