Question

give the name and molecular formula of a higher homologue of propane

Answer 1

The higher homologues are :
 Butane C₄H₁₀
 Pentane C₅H₁₂
 Hexane C₆H₁₄
...
..
...
And so on... 

Answer 2

Answer:

The name and molecular formula of a higher homologue of propane are butane and $C_{4}H_{10}$ respectively.

Alkanes:

• In organic chemistry, alkanes are a family of saturated and acyclic hydrocarbons.
• They consist of carbon and hydrogen atoms linked via single covalent bonds.
• The general chemical formula of an alkane is $C_{n}H_{2n+2}$, where n is the number of carbon atoms.
• The number of hydrogen atoms in an alkane is two more than twice the number of carbon atoms.
• Alkanes are not very reactive and are colorless and odorless.
• The first member of the alkane family is methane ($CH_{4}$) having four hydrogen atoms linked to one carbon atom.

Propane is the third member of the alkane family having molecular formula $C_{3}H_{8}$.

The next higher homologue of propane will have one carbon atom more, i.e., n = 4

So, the number of hydrogen atoms will be 2n + 2 = 2×4 + 2 = 8+2 = 10

Therefore, the molecular formula will be $C_{4} H_{10}$ and the name of this molecule is butane.

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