7. Which of the following predictions of δ value and splitting pattern of the labeled protons in ¹H NMR (CDCl₃) is true? (A) Hₐ (2.5 ppm, triplet) (B) Hb (3.1 ppm, triplet of triplet) (C) Hc (3.1 ppm, triplet of triplet) (D) Hd (2.2 ppm, triplet of doublet) (E) He (2.0 ppm, singlet)

11. At some temperatures, the relative reactivities of 3°, 2° and 1° alkane hydrogens in free radical chlorination are in the ratio of 5:3:1. What would be the expected percentages of monochlorination of isopentane produced? (i) 2-chloro-2-methylbutane, (ii) combined 1-chloro-2-methylbutane and 1-chloro-3-methylbutane, and (iii) 2-chloro-3-methylbutane. (A) 10% (i), 75% (ii), 15% (iii) (B) 25% (i), 45% (ii), 30% (iii) (C) 29% (i), 44% (ii), 18% (iii) (D) 30% (i), 35% (ii), 35% (iii) (E) 36% (i), 43% (ii), 21% (iii)

7. Which of the following predictions of δ value and splitting pattern of the labeled protons in ¹H NMR (CDCl₃) is true?

(A) Hₐ (2.5 ppm, triplet)
(B) H_b(3.1 ppm, triplet of triplet)
(C) H_c(3.1 ppm, triplet of triplet)
(D) H_d (2.2 ppm, triplet of doublet)
(E) H_e (2.0 ppm, singlet)

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