Let the numbers of Kekulé (resonating) structures of benzene, naphthalene, phenanthrene and pyrene be p, q, r and s respectively. Which of the following relations is/are correct ?
(p) (q) (r) (s)

Question

Let the numbers of Kekulé (resonating) structures of benzene, naphthalene, phenanthrene and pyrene be p, q, r and s respectively. Which of the following relations is/are correct ? (p) (q) (r) (s)

TestHub · Accepted Answer

Counting the arrangements of double bonds that give every carbon one double bond: benzene p = 2, naphthalene q = 3, phenanthrene r = 5, pyrene s = 6.

(A) 2 + 6 = 8 and 3 + 5 = 8. Correct.

(B) 6 = 2 × 3. Correct.

(C) $r^{2}$ = 25 but $p^{2}$ + $q^{2}$ = 4 + 9 = 13. Wrong.

(D) p × r = 10 but s + q = 9. Wrong.

Answer: (A), (B).

Chemistry - GOC Question with Solution | TestHub

Options:(select one or more)

Doubts & Discussion