Molecular Structure of Alkanes

The video tutorial explains the structure of 2,5-dimethylhexane, an alkane with single bonds. It starts by identifying the hexane base with six carbon atoms, then adds methyl groups to the second and fifth carbons. The final molecular formula is C8H18. The tutorial emphasizes the naming conventions and structural representation of alkanes.

What does the suffix '-ane' in 2,5-dimethylhexane indicate about its structure?

• It contains a benzene ring.

• It is an alkene.

• It contains double bonds.

• It is an alkane with single bonds.

How many carbon atoms are present in the hexane chain of 2,5-dimethylhexane?

• Five

• Seven

• Six

• Four

What is the chemical formula for a methyl group?

• C3H8

• CH3

• CH4

• C2H6

On which carbon atoms are the methyl groups placed in 2,5-dimethylhexane?

• Third and fourth

• Second and fifth

• First and second

• Fourth and sixth

What is the molecular formula of 2,5-dimethylhexane?

• C8H18

• C7H16

• C6H14

• C9H20

If you start numbering the carbon atoms from the opposite end, what would the name of the compound be?

• 2,5-dimethylhexane

• 3,4-dimethylhexane

• 1,6-dimethylhexane

• 2,6-dimethylhexane