Alkane Properties and Formulas

The video tutorial explains the general formula for alkanes, which are hydrocarbons made of carbon and hydrogen with single bonds. It introduces methane (CH4), ethane (C2H6), and propane (C3H8) as examples, and derives the formula CnH2n+2 for alkanes. The tutorial emphasizes that this formula applies to both straight-chained and branched alkanes.

What elements make up alkanes?

• Carbon and Oxygen

• Carbon and Hydrogen

• Oxygen and Nitrogen

• Hydrogen and Nitrogen

What is the simplest alkane?

• Ethane

• Propane

• Butane

• Methane

How many hydrogen atoms are in ethane?

• Ten

• Eight

• Six

• Four

What is the chemical formula for ethane?

• C3H8

• CH4

• C2H6

• C2H4

How many carbon atoms are in propane?

• Two

• One

• Three

• Four

What is the chemical formula for propane?

• CH4

• C3H6

• C3H8

• C2H6

What is the general formula for alkanes?

• CnH2n+2

• CnHn+2

• CnH2n

• CnH2n-2

If an alkane has 4 carbon atoms, how many hydrogen atoms does it have?

• 8

• 14

• 10

• 12

Does the general formula for alkanes apply to branched alkanes?

• Only for cyclic alkanes

• Only for straight-chained alkanes

• No

• Yes

What is the significance of the 'n' in the alkane formula CnH2n+2?

• It represents the number of bonds.

• It represents the number of hydrogen atoms.

• It represents the number of carbon atoms.

• It represents the number of oxygen atoms.