Alkanes and Alkenes Part II

Alkanes and Alkenes Part II

Multiple Choice

A compound consists of carbon and hydrogen elements only. It also contains a carbon-carbon double bond. This compound is known as

• saturated organic compound

• unsaturated organic compound

• saturated hydrocarbon

• unsaturated hydrocarbon

Fill in the Blank

The "ene" ending in "alkene" tells someone that they are dealing with _________-bonded carbons.

Fill in the Blank

How many carbon atoms are in propane

Multiple Choice

Which of the following shows the structure of propene?

Multiple Choice

Which of the following shows the structure of ethene?

Multiple Choice

Classify the compound based on the functional group present.

• alkane
• alkene
• alkyne
• aromatic

Multiple Choice

General formula of Alkene is

• C_nH_2n+2

• C_nH_2n

• C_nH_2n+1OH

• C_nH_2n+1COOH

Fill in the Blank

Give the name of this compound...

C₃H₈

Multiple Choice

When does incomplete combustion occur?

• Lack of oxygen
• Excess oxygen
• Depends
• Lack of fuel

Multiple Choice

What is the colour change when an alkene reacts with bromine water?

• Turns clear
• Turns orange
• From colourless to orange
• From orange to colourless
• Turns colourless

Multiple Choice

How do you test for an alkene?

• React it with oxygen
• React it with litmus paper
• React it with bromine water
• pH test

Fill in the Blank

In alkenes as number of C atoms ____________, m.p., b.p. and density also increases

Multiple Choice

In one of the reaction in alkanes brown color disappear when they react with .....

• chlorine

• bromine

• KMnO4

• Alcohols

Multiple Choice

If an alkene reacts with a halogen, it is known as what type of reaction?

• Addition

• Condensation

• Polymerisation

• Hydrogenation

Multiple Choice

Polyunsaturated means having many

• C=C bonds

• C-C bonds

• C=O bonds

• C-O bonds

Multiple Choice

Both alkanes and alkenes are

• hydrocarbons

• alcohols

• saturated

• unsaturated

Multiple Choice

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.

Multiple Choice

Which of the following is not a chemical properties of alkenes?

• combustion

• substitution

• addition reaction

• polymerisation