Chemical Bonding and molecular structure Multiple choice questions (MCQs) || Chemical bonding MCQs || Chapter 4 class 11 Chemistry MCQs || Part II ||
(a) Si F 4
(b) S F 4
(c) X e F 4
(d) B F3
Ans: (b) S F 4
12. Which of the following molecule/ion does not contain unpaired electrons ?
(a) N molecule
(b) O2 + 2 electron
(c) O2
(d) B molecule
Ans: (b) O2 + 2 electron
13. The percentage ionic character of a bond having 1.275 Ã… its length and 1.03 D its dipole moment is:
(a) 10%
(b) 15%
(c) 16.83%
(d) 18.8%.
Ans: (c) 16.83%
14. The angle between covalent bonds is maximum in
(a) C H 4
(b) B F 3
(c) P F 3
(d) N H 3
Ans: (b) B F 3
15. The percentage character of the hybrid orbitals in methane, ethene and ethyne are
(a) 25, 50, 75
(b) 25, 33,75
(c) 25, 33, 50
(d) 100, 50, 25
Ans: (c) 25, 33, 50
16. Carbon dioxide is iso structural with
(a) Tin chloride
(b) Zinc chloride
(c) Mercury chloride
(d) Ethene
Ans: (c) Mercury chloride
17. The correct order of the 0-O bond length in O2, H2 O2(hydrogen peroxide), and O 3(ozone), is
(a) O2 > O 3 > H2 O2
(b) O 3 > H2 O2, > O2
(c) H2 O2, > O 3 > O2
(d) O2 > H2 O2, > O 3
Ans: (c) H2 O2, > O 3 > O2
18. The correct order of dipole moment is
(a) C H 4, < N F 3, < N H 3, < H2O
(b) N F 3, < C H 4, < N H 3, < H2O
(c) C H 4, < N H 3, < N F 3, < H2O
(d) H2O < N H 3, < N F 3, < C H 4,
Ans:
(a) C H 4, < N F 3, < N H 3, < H2O
19. Which of the following has highest bond angle ?
(a) N O2 - 1 electron
(b) N O2,
(c) N O2, +1 electron
(d) N O 3,
Ans: (a) N O2 - 1 electron
20. Formal charge on two Oxygen atoms in Sulphur dioxide is
(a) -1, +1
(b) -1, 0
(C) 0+ 1
(d) -1, -1
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