Stability of Carbocations Quiz

Which of the following is NOT a condition for resonance to occur?

• Presence of a free radical

• Presence of a triple bond

• Presence of a lone pair of electrons

• Presence of a pi bond and a sigma bond

What is the relationship between alpha hydrogens and hyperconjugated structures?

• There is no relationship between alpha hydrogens and hyperconjugated structures

• The number of alpha hydrogens is half the number of hyperconjugated structures

• The number of alpha hydrogens is equal to the number of hyperconjugated structures

• The number of alpha hydrogens is double the number of hyperconjugated structures

Which carbocation is the most stable based on hyperconjugation?

• Tertiary carbocation

• Secondary carbocation

• Primary carbocation

• Methyl carbocation

What effect does the inductive effect have on carbocation stability?

• It decreases stability by withdrawing electrons

• It increases stability by donating electrons

• It has no effect on stability

• It only affects stability in the presence of resonance

How many hyperconjugated structures are possible for a carbocation with six alpha hydrogens?

• Three

• Six

• Nine

• Twelve

Which of the following statements is true about inductive effect?

• It involves the donation or withdrawal of electrons

• It is irrelevant to carbocation stability

• It is stronger than resonance

• It only occurs in aromatic compounds

In a complex example, which factor is considered first for determining carbocation stability?

• Resonance

• Inductive effect

• Number of alpha hydrogens

• Hyperconjugation

Why is a resonating structure with more double bonds more stable?

• It has more hyperconjugated structures

• It has more pi bonds

• It has more electron donors

• It has more resonance energy

Which carbocation is more stable: benzilic or tertiary butyl?

• Stability depends on the solvent

• Benzilic carbocation

• Tertiary butyl carbocation

• Both are equally stable

What is the primary reason for the stability of tertiary butyl carbocation over benzilic carbocation?

• Higher molecular weight

• Less steric hindrance

• More hyperconjugation and inductive effect

• Greater resonance