Cracking and Alkenes

What are the two key features of alkanes?

• They have a double covalent bond between two carbon atoms

• They have a general formula of CnH2n+2

• They are less reactive than alkenes

• They are used to make polymers

What are the two key features of alkenes?

• They have a double covalent bond between two carbon atoms

• They have a general formula of CnH2n+2

• They are less reactive than alkenes

• They are used to make polymers

What is the purpose of a catalyst in catalytic cracking?

• To speed up the reaction

• To convert long chain hydrocarbons into shorter chain hydrocarbons

• To produce alkenes

• To balance chemical equations

What is the other type of cracking besides catalytic cracking?

• Steam cracking

• Polymer cracking

• Hydrogen cracking

• Alkene cracking

What is the test for alkenes?

• Shaking with bromine water

• Heating with steam

• Adding a catalyst

• Balancing chemical equations

What is the product of cracking a long chain hydrocarbon?

• Shorter chain alkane

• Longer chain alkane

• Alkene

• Polymer

What is the number of carbon atoms and hydrogen atoms in the second product molecule of the cracking equation?

• 5 carbon atoms and 10 hydrogen atoms

• 20 carbon atoms and 42 hydrogen atoms

• 25 carbon atoms and 52 hydrogen atoms

• 40 carbon atoms and 82 hydrogen atoms

What is the key factor about alkenes?

• They are used to make polymers

• They are more reactive than alkanes

• They have a general formula of CnH2n+2

• They have a double covalent bond between two carbon atoms

What happens to bromine water when shaken with an alkene?

• It turns clear

• It turns orange

• It turns colorless

• It turns green

What is the number of carbon atoms and hydrogen atoms in the first product molecule of the cracking reaction?

• 7 carbon atoms and 14 hydrogen atoms

• 20 carbon atoms and 42 hydrogen atoms

• 33 carbon atoms and 68 hydrogen atoms

• 40 carbon atoms and 82 hydrogen atoms