Question

The number of benzylic hydrogen atoms in ethyl benzene is:
A.$3$
B.$5$
C.$2$
D.$7$

Answer 1

This question gives the knowledge about benzylic hydrogen. The benzylic hydrogen is the hydrogen atoms attached to the benzylic carbon. The hydrogen atoms attached to the carbon atom next to the benzene or adjacent to benzene.

Complete answer:
The benzylic hydrogen is the hydrogen atoms attached to the benzylic carbon.The molecular formula of ethylbenzene is ${C_6}{H_5}C{H_2}C{H_3}$. It is an organic molecule. The hydrogen atoms attached to the carbon atom next to the benzene or adjacent to benzene. So, the number of benzylic hydrogen atoms in ethyl benzene molecules are $2$.

Therefore, option $C$ is the correct option.

Additional information:
Properties of ethylbenzene are as follows:
$1$. Ethylbenzene is very useful in the manufacturing of polystyrene by acting as an intermediate.
$2$. Ethylbenzene is highly inflammable which means it catches fire very easily.
$3$. It is a colorless liquid which possesses an odor very similar to the gasoline.
$4$. The catalytic dehydrogenation of ethylbenzene leads to the formation of styrene and hydrogen.
$5$. Ethylbenzene is also used as an anti-knocking agent in gasoline which increases the octane rating and decreases the engine knocking.
$6$. Ethylbenzene is also used in recovering the natural gas.
$7$. It also helps in manufacturing plastics.
$8$. It is also found in paints, insecticides, inks, carpet glue, gasoline and so forth.

Note:
The hydrogen atoms attached to the carbon atom next to the benzene or adjacent to benzene. Ethylbenzene is very useful in the manufacturing of polystyrene by acting as an intermediate.It is found in inks, paints, insecticides, carpet glues and tobacco products.