1. Which of the following is true regarding an SN1 reaction? a. It would be faster at 25 ̊ than 50 ̊ b. It would be faster in ethanol than in pentane c. Keeping the moles of reactants constant but doubling the quantity of solvent would decrease the rate by a factor of 4. d. Stereochemical inversion occurs exclusively
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multiple choice:
1. Which of the following is true regarding an SN1 reaction?
a. It would be faster at 25 ̊ than 50 ̊
b. It would be faster in ethanol than in pentane
c. Keeping the moles of reactants constant but doubling the quantity of solvent would decrease the rate by a factor of 4.
d. Stereochemical inversion occurs exclusively
2. Which of the following statements is true?
a. The rate determining step is always the last step in a reaction mechanism.
b. The stability/reactivity principle says that the more stable of two chemicals will be more reactive
c. The reactivity/selectivity principle says that the more reactive of two chemicals will be less selective.
d. The activation barrier for a reaction is the difference in energy between reactants and final products.
3. Which of the following statements is FALSE?
a. Optically active solutions always contain chiral molecules.
b. Two diastereomers always have identical melting points
c. Optically inactive solutions are either racemic or else contain no chiral chemicals at all
d. A solution with 60% optical purity would have an 80/20 mix of enantiomers
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