Alkanes and Alkenes

Which of the following shows the structure of ethene?

• 
• 
• 
• 

The first member of the alkene series is methene.

• True
• False

General formula of Alkene is 

• C_nH_2n+2
• C_nH_2n
• C_nH_2n+1OH
• C_nH_2n+1COOH

Which of the following is unsaturated hydrocarbon ?

• propane

• propene

• propanol

• propanoic acid

Alkanes molecules are held together by

• metallic bonds

• Van der Waals forces of attraction

• covalent bonds

• ionic bonds

Methane reacts with chlorine in substitution reaction. Which of these is an essential condition?

• An acid catalyst

• A low temperature

• UV light

• A low pressure

Alkanes react with excess oxygen to form

• carbon dioxide and water

• salt and water

• carbon monoxide and soot

• metal hydroxide and hydrogen

Possible products of INCOMPLETE combustion

• Carbon (C)

• Carbon Monoxide (CO)

• Carbon Dioxide (CO₂)

• Water (H₂O)

If an alkene has 20 carbon atoms, how many hydrogen atoms will it have?

• 20

• 22

• 40

• 42

Which of the following would have the highest melting point?

• C₃H₈
• C₄H₈
• C₅H₁₂
• C₂₂H₄₄

Tags

NGSS.HS-PS1-3