The minimum torsional strain developed in butane is at dihedral angle$\left(\mathrm{s}\right)$

In the given compounds how many are unsaturated hydrocarbon?

What is the final product of the given reaction?

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{CH}\stackrel{\mathrm{Na}}{\to }\stackrel{{\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{I}}{\to }\mathrm{Product}$

Select the correct reactivity order of dehydrohelogenation reaction for the following halides with alcoholic $\mathrm{KOH}.$

(i) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2-\mathrm{Br}$

(ii) ${\mathrm{CH}}_3-\mathrm{CH}\left(\mathrm{Br}\right)-\mathrm{CH}{\left({\mathrm{CH}}_3\right)}_2$

(iii) ${\mathrm{CH}}_3-\mathrm{CH}\left(\mathrm{Br}\right)-{\mathrm{CH}}_2\mathrm{Ph}$

$\left(\mathrm{A}\right)\frac{{\mathrm{OH}}^{+}}{\mathrm{\Delta }}\left(\mathrm{P}\right)\stackrel{{\mathrm{LiAIH}}_4}{\to }\left(\mathrm{Q}\right)$

If $\mathrm{Q}$ does not decolourise baeyer reagent then $\mathrm{A}$ would be: