Question

 The IUPAC name of the compound is:

A. $1 - $methylpropane
B. $2 - $methylpropane
C. Butane
D. $2 - $methyl butane

Answer 1

Hint: The systematic approach followed for the nomenclature of organic compounds as recommended by the International Union of Pure and Applied Chemistry is referred to as IUPAC nomenclature of organic compounds.

Complete answer:
In the given compound we can see that the longest chain contains $3$ carbon atoms that are bonded to each other by a single bond. Hence , it is named as propane. Methyl group is present as the substituent group.
Therefore, the IUPAC name of the compound is $2 - $methylpropane.
Hence, the correct option is B. $2 - $methylpropane.
Hydrocarbons are chemical substances that only contain carbon and hydrogen. Alkanes, alkenes, aromatics, and alkynes are hydrocarbons. A functional group inside an alkane is a carbon-carbon single bond.

Additional information: The groups of atoms which are bound to the carbon backbone of organic molecules are known as functional groups. Functional groups are groups of one or more atoms with different chemical properties regardless of what is attached to them. The atoms of functional groups are bound by covalent bonds with one another and with the rest of the molecule

Note:
A carbon-carbon double bond is a functional group inside an alkene. In an alkyne, the functional group is a triple carbon-carbon bond. Alpha carbon is the first carbon atom connected to the functional group; beta carbon is the second; gamma carbon is the third, and so on.