Alkanes vs Alkenes

Which of the following can be used to distinguish between alkanes and alkenes?

• add a few drops of aqueous bromine

• add a few drops of Universal indicator

• add a piece of blue litmus paper

• add a piece of red litmus paper

A homologous series is a family of organic compounds with

• similar chemical properties and same general formula

• similar chemical properties and different general formula

• different chemical properties and same general formula

• similar physical properties and same general formula

Which of the following statement is correct?

• Alkenes can turn aqueous bromine from reddish-brown to colourless.

• Alkenes can turn aqueous bromine from colourless to reddish-brown.

• Alkanes can turn aqueous bromine from reddish-brown to colourless.

• Alkanes can turn aqueous bromine from colourless to reddish-brown.

Tags

NGSS.HS-PS1-2

State the general formula for alkene

• C_nH_2n+2

• C_nH_2n

• C_nH_2n+1

• C_nH_2n-2

What is the process called when a large alkane is broken down into smaller alkanes and alkenes?

• Polymerization

• Hydrogenation

• Cracking

• Halogenation

Which reaction involves the addition of hydrogen to an alkene to form an alkane?

• Hydration

• Hydrogenation

• Halogenation

• Polymerization

What is the name of the process that converts unsaturated hydrocarbons to saturated hydrocarbons using a catalyst?

• Catalytic cracking

• Catalytic reforming

• Catalytic hydrogenation

• Catalytic hydration

The formula for ethene is

• C₂H₄

• C₂H₆

• CH₄

• C₃H₆

Both alkanes and alkenes are

• hydrocarbons

• alcohols

• saturated

• unsaturated

An alkane is

• polyunsaturated

• polysaturated

• saturated

• unsaturated