Electrophilic addition reactions

What reactant is needed to convert ethene into ethanol?

• HBr

• H20

• H2

• Br2

Which statement is FALSE ? Electrophiles...

• are electron deficient species

• donate a lone pair

• are positively charged species

• attack an electron rich region

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Addition reactions happen for alkenes due to

• stable C=C double bonds

• unstable weak π bonds

• stable C-C bonds

• unstable sigma bond

Diagram shows the formation of a

• 1° carbocation

• 2° carbocation

• 3° carbocation

• None of the above

Which carbocation is most stable and why?

• 1°carbocation because of strong inductive effect
• 1°carbocation because of weak inductive effect
• 3°carbocation because of weak inductive effect
• 3°carbocation because of strong inductive effect

Tags

NGSS.HS-PS1-1

Which is the major product shown in the diagram?

• A

• B

• Both

• None of the above

A is the major product of this reaction because it has

• greater positive inductive effect due to 1° carbocation form

• greater positive inductive effect due to 2° carbocation form

• greater positive inductive effect due to 3° carbocation form

• None of the above

Electrophilic Addition involves...

• The addition of a nucleophile to an alkane

• The addition of a electrophile to an alkane

• The addition of a electrophile to an alkene

• The subtraction of a nucleophile to an alkene

Which of the following is an electrophile?

• H₂

• Br₂

• H₂O

• They all are!

What would you make if you added Hydrogen to Ethene?

• Ethane

• Propane

• 1,2 - dihydroethane

• Ethanol