Question

Mash gas is:
A. ${C_6}{H_6}$
B. $C{H_4}$
C. ${C_2}{H_2}$
D. $CO$

Answer 1

Hint: Chemistry is the subject that deals with chemicals and their composition in our nature. There are several conventions laid down by the organizations for the easy handling of the names and representations of the compounds to avoid confusion. But there are also the names that are easy for the common people to memorize and use in the day to day use.

Complete step by step answer:
There are naming conventions laid down by the organizations for the usage of the people to deal with but the common people are not comfortable with the scientific name and thus would prefer the common naming conventions.
${C_6}{H_6}$ is the compound known as benzene. It has a ring structure and shows the property of aromaticity. It has six carbon atoms connected in the form of a ring with alternate double and single bonds delocalized throughout the ring.
$C{H_4}$ is the gas called methane. It is formed from the decaying matter in the marshes and thus is also referred to as marsh gas by common people. It is a single carbon atom with four valencies filled with hydrogen atoms.
${C_2}{H_2}$ is called ethyne which is commonly called acetylene. It is the simplest alkyne and is used as the fuel and the base for the formation of more complex hydrocarbons.
$CO$ is called carbon monoxide. It is the carbon gas that is dangerous for humans as it is dissolved with the blood to form a complex called carbon hemoglobin which acts as a poison to the body.

So, the correct answer is Option B.

Note: Benzene shows the property of aromaticity. It says that the bonds present in benzene are not fixed but are delocalized. Delocalized means that the electrons related to or involved in the formation of the bonds are mobile and are in constant motion.