What is the minimum quantity (in grams) of methyl iodide required for preparing one mole of ethane by Wurtz reaction?
(Atomic weight of iodine $= 127$)

The product obtained by the vapor phase nitration of propane is:

In the case of the homologous series of alkanes,which one of the following statements is incorrect?

Assertion $(A)$: Cyclohexane is the most stable cycloalkane.
Reason $(R)$: Cyclopropane and cyclobutane are less stable due to angle strain and torsional strain.
The correct answer is

Consider the following reaction:
$H_3C-CH(D)-CH(CH_3)-CH_3 + Br^\bullet \to X + HBr$
Identify the structure of the major product $X$.

$A$ compound $A$ contains $C$ and $H$ only and has a molecular mass of $72$. Its photochlorination gives a mixture containing only one monochloro and two dichloro hydrocarbons. What is its $IUPAC$ name?