$R^{\prime}-X \xrightarrow{Na / \text{ether}} 2,3-\text{dimethylbutane}$. Identify $R^{\prime}$.

Which of the following has the lowest barrier to rotation about the indicated bond?

Methane reacts with steam at $1273 \ K$ in the presence of a nickel catalyst to form:

Propane molecule on chlorination under photochemical conditions gives two dichloro products,$x$ and $y$. Amongst $x$ and $y$,$x$ is an optically active molecule. How many trichloro products (consider only structural isomers) will be obtained from $x$ when it is further treated with chlorine under photochemical conditions?

$Ph-CH=NO_2H$ $\xrightarrow[{3 \ days}]{{isomerises}}$ $\mathop {(x)}\limits_{(50-50\%)}$,Isomer $(x)$ is

Which of the following statements is incorrect for alkanes?