Embibe Experts Solutions for Chapter: Organic Chemistry- Some Basic Principles and Techniques, Exercise 1: Assam CEE 2016

 Arrange the following free radicals in order of decreasing stability:

$\mathrm{Methyl}\left(\mathrm{I}\right), \mathrm{Vinyl}\left(\mathrm{II}\right),\mathrm{Allyl}\left(\mathrm{III}\right) \mathrm{and} \mathrm{benzyl}\left(\mathrm{IV}\right)$

Bond length of ethane $\left(\mathrm{I}\right),$ ethene $\left(\mathrm{II}\right),$ ethyne $\left(\mathrm{III}\right)$ and benzene $\left(\mathrm{IV}\right)$ follows the order:

The number of optically active isomers of the compound ${\mathrm{CH}}_3\mathrm{CHBr}-\mathrm{CHBr}-\mathrm{COOH}$ is

In Lassaigne's test, on boiling sodium thiocyanate with ferrous sulphate produces

An organic compound $\mathrm{A}\left({\mathrm{C}}_4{\mathrm{H}}_{10}\mathrm{O}\right)$ on oxidation produces $\mathrm{B}\left({\mathrm{C}}_4{\mathrm{H}}_8\mathrm{O}\right)$. $\mathrm{B}$ forms oxime and shows iodoform reaction, but does not react with Fehling's solution. $\mathrm{A}$ and $\mathrm{B}$ are respectively.

Among the following, the aromatic compound is

The $\mathrm{IUPAC}$ name of  is