Which of the following compounds does not react with $Na$ metal?

The product of the reaction shown below will be:

An organic compound $C_8H_{12}$ on ozonolysis gives $2 \ moles$ of $3-$oxobutanal. Then the structure of the compound can not be

Identify the product $(C)$ in the following series of reaction:
$\text{Cyclopentane}$ $\xrightarrow{Br_2, hv} A$ $\xrightarrow{\text{alc. KOH}} B$ $\xrightarrow{\text{NBS}} C$

Give the uses of hydrocarbons with examples.

What is the correct order of bond dissociation energy for the following $C-H$ bonds?
$I. \, CH_3-H$
$II. \, CH_3CH_2-H$
$III. \, CH_2=CH-CH_2-H$
$IV. \, C_6H_5-H$