Chemical Bonding and molecular structure Multiple choice questions (MCQs) || Chemical bonding MCQs || Chapter 4 class 11 Chemistry MCQs || Part 3rd ||

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Ques 21: Which of the following molecules does not contain a lone pair of electrons ?

(a) N H3

(b) P F5

(c) H2O 

(d) S F 4

Ans: (b) P F5

Ques 22: Hydrogen bond is strongest in

(a) S-H.....O 

(b) 0-H.....S

(c) F- H.....F 

(d) F- H...O 

Ans: (c) F- H.....F

Ques 23: The pair likely to form strongest hydrogen bonding is

(a) H2 O2 and H2O

(b) H C OOH and C H 3COOH

(c) C H 3COOH and C H 3COOC H 3,

(d) Si H 4 and Si Cl 4

Ans: (b) H C OOH and C H 3COOH

Ques 24: Which of the following has highest boiling point?

(a) N H3

(b) P H3

(c) Sb H3,

(d) As H3

Ans: (a) N H3

Ques 25: The calculated bond order in O, ions is : 

(a) 1

(b) √1

(c) 2

(d) √2

Ans: (b) √1

Ques 26: In which of the following molecules, the central atom has two lone pairs of electrons ?

(a) S F 4

(b) Br F5

(c) SO 2

(d) Xe F 4

Ans: (d) Xe F 4

Ques 27: If z-axis is considered as molecular axis, which of the following combinations is not possible for homo nuclear diatomic molecules ?

(a) 2pz + 2s

(b) 2py - 2py

(c) 2px + 2px

(d) 2px + 2py

Ans: (d) 2px + 2py

Ques 28: What types of hybridisation is possible in square planar molecules ?

(a) sp³d

(b) dsp³

(c) dsp²

(d) sp³d²

Ans: (c) dsp²

Ques 29: PCI, molecule has the following geometry:

(a) Trigonal bi pyramidal 

(b) Octahedral

(c) Square planner

(d) Planner triangular.

Ans: (a) Trigonal bi pyramidal

Ques 30: Which of the following is paramagnetic ?

(a) O2  + 1 electron

(b) CN + 1 electron

(c) CO

(d) NO   - 1 electron

Ans: (a) O2  + 1 electron


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