Substitution vs Elimination

This is a 40-question multiple-choice quiz on nucleophilic substitution (SN1 or SN2) versus elimination (E1 or E2). Types of questions include:
(1) Predict the major product(s) of the following reaction. [10 questions]
(2) Which mechanism leads to the boxed product of the following reaction? [10 questions]
(3) Select the best reagent to produce the product shown in highest yield. [10 questions]
(4) Which reaction cannot occur? [5 questions]
(5) What is the correct order of SN2 reactivity for the alkyl halides shown? [2 questions]
(6) What is the correct order of E2 reactivity for the alkyl halides shown? [1 question]
(7) What is the correct order of SN1 reactivity for the alkyl halides shown? [1 question]
(8) What is the correct order of E1 reactivity for the alkyl halides shown? [1 question]
In addition, there are detailed answers given for all 40 questions.