What Is the Most Likely Mechanism for the Following Reaction

Q16: Which of the labeled protons in the

Q17: What is (are)the elimination product(s)of the following

Q18: Which alkyl halide(s)would give the following alkene

Q19: What is (are)the product(s)of the following reaction?

Q20: What is the major elimination product obtained

Q22: Which of the following alkyl halide would

Q23: What is (are)the product(s)of the following reaction?

Q24: What is the product of the following

Q25: What is (are)the starting material(s)in the reaction

Q26: What is the most likely mechanism for