Chemical Bonding and molecular structure Multiple choice questions (MCQs) || Chemical bonding MCQs || Chapter 4 class 11 Chemistry MCQs || Part II ||

11. Which of the following would have a permanent dipole moment? 

(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 Å its length and 1.03 D its dipole moment is:

(a) 10%

(b) 15%

(c) 16.83% 

(d) 18.8%.

Ans: (c) 16.83% 

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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

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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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