Testing Alkenes With Bromine Water

The video explains the difference between alkenes and alkanes, focusing on their chemical bonds and saturation. Alkenes have a carbon-carbon double bond, making them unsaturated and reactive in addition reactions. Alkanes are saturated with single bonds, preventing additional reactions. The video demonstrates a test using bromine water, which changes color when reacting with alkenes but not with alkanes, due to the latter's saturation.

What is the main structural difference between alkenes and alkanes?

• Alkenes and alkanes both have double bonds.

• Alkenes have single bonds, while alkanes have a double bond.

• Alkenes have a double bond, while alkanes have single bonds.

• Alkenes have a triple bond, while alkanes have a double bond.

Why are alkenes considered unsaturated hydrocarbons?

• They can form additional bonds by breaking the double bond.

• They have the maximum number of hydrogen atoms.

• They have no carbon-carbon bonds.

• They are always in a gaseous state.

What color is bromine water before it reacts with an alkene?

• Blue

• Colorless

• Green

• Brown or yellowy-orange

What happens to the color of bromine water when it reacts with an alkene?

• It remains brown.

• It turns blue.

• It becomes colorless.

• It turns green.

What is the result when an alkane is added to bromine water?

• The solution turns colorless.

• The solution remains brown.

• The solution turns green.

• The solution turns blue.