$A$ certain alkane is mixed with chlorine and irradiated with ultraviolet light. It yields only one monochloroalkane. Which alkane is it?

What is the difference in molar masses of Undecane and Decane?

Which of the following products is $NOT$ formed by the reaction between methane and chlorine in the presence of sunlight?

Identify the final product $C$ in the following reaction sequence:
$Br-(CH_2)_5-Br$ $\xrightarrow{Na, \text{D.E.}} A$ $\xrightarrow{Br_2, \Delta} B$ $\xrightarrow{\text{alc. KOH}, \Delta} C$

Identify the major product $'E'$ in the following reaction sequence:
Cyclohexane $\xrightarrow{Br_2, h\nu} (A)$ $\xrightarrow{Na, D.E.} (B)$ $\xrightarrow{Br_2, h\nu} (C)$ $\xrightarrow{H_2O} (D)$ $\xrightarrow{conc. H_2SO_4} (E)$

Formation of alkane by the action of $Zn$ on alkyl halide is called