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