Identify the correct stability order of following alkenes.

I) $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{C}\left(\mathrm{CH}_3\right)_2$

II) $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$

III) $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CHCH}_3$

Which of the following element in +1 oxidation state has largest ionic radius?

Identify the product in following reaction. Pent -3-enenitrile $\xrightarrow[\mathrm{H}_3 \mathrm{O}^{+}]{\mathrm{AlH}(\mathrm{B}-\mathrm{B})_2}$ product

Which of the following molecules has zero dipole moment?