Alkane Naming

A hydrocarbon is...

• A compound made only of carbon

• A compound made of carbon and hydrogen

• A compound made of only hydrogen

• A compound made of carbon, hydrogen, and oxygen

Answer explanation

A hydrocarbon is a compound made of carbon and hydrogen, which is the correct choice among the given options.

What is the general chemical formula for alkanes?

• C_nH_2n

• C_nH_n

• C_2nH_n

• C_nH_2n+2

Answer explanation

The general chemical formula for alkanes is C_nH_2n+2, where n represents the number of carbon atoms in the alkane chain.

Because carbon can reach an octet in many different ways, which shapes can carbon molecules form?

• Tetrahedral

• Trigonal planar

• Linear

• All of these

Answer explanation

Carbon can form tetrahedral, trigonal planar, and linear shapes due to its ability to reach an octet in various ways, making the correct answer choice 'All of these'.

Which of the following is propane?

• CH₄

• C₂H₆

• C₃H₈

• C₄H₁₀

Answer explanation

Propane is represented by the chemical formula C3H8, so the correct choice is C3H8.

Name the alkane

• Methane

• Ethane

• Propane

• Butane

Answer explanation

The correct alkane is Ethane as it has 2 carbon atoms, which is the characteristic of Ethane.

Name the alkane

• 2-methyl hexane

• 2-methyl pentane

• 5-methyl hexane

• 2-ethyl hexane

Answer explanation

The correct alkane is 2-methyl hexane because it has a total of 6 carbon atoms with a methyl group attached to the second carbon atom.

Name the alkane

• Hexyne

• Hexene

• Hexane

• Pentane

Answer explanation

The correct alkane is Hexane because it is a saturated hydrocarbon with only single bonds between carbon atoms.

Name the alkane

• Nonane

• 5-methyl-4-ethyl nonane

• 5-ethyl-6-methyl nonane

• 4-ethyl-5-methyl nonane

Answer explanation

The alkane is named 4-ethyl-5-methyl nonane because the substituents are listed alphabetically, and the numbering starts from the end that gives the lowest numbers to the substituents.

Name the alkane

• 3-ethyl hexane

• 4-ethyl hexane

• hexane

• 3-methyl hexane

Answer explanation

The correct alkane is 3-ethyl hexane because it has an ethyl group attached at the 3rd carbon of the hexane chain.

Name the alkane

• Pentane

• cyclohexane

• cyclopentane

• cyclane

Answer explanation

The correct alkane is cyclopentane because it is a cyclic hydrocarbon with five carbon atoms in the ring structure.