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5. Which of the following compounds has the highest reactivity in the Diels-Alder reaction with benzoquinone? (A) (B) (C) (D) (E) 10. What is the major final organic product of the following sequential reactions? (xs = excess) 1) HBr, ROOR 2) t-BuOK 3) Bry/CCU 4) xs NaNH2 5) H20 6) NaNH, 7) Mel 8) Na, NH, 0) 11. What is the major final organic product of the following reactions? 1) Mg, diethyl ether OH Br 2) ملی ما HO 3) H20 4) Na, Cr,Oy, H,SO, H, (A) (B) (C) 12. What is the major final organic product of the following reactions? (D) (E) NH2 1) Excess CHg1 2) Ag,0,H,O, heat (B) (C) (D) 13. What is the major final organic product of the following reactions? (A) (E) 1) HNO3. H,SO 2) Fe, H,0* 3) NaNO, HCI 4) CuCN 5) H307, heat (A) NO2 (B) OH (C) COOH (D) NH2(E) CONHA