Students are recall and prepare chemical bonding questions and answers for competitive exams.

1. Topic: Chemical Bonding
Chemistry
TRB
Questions and Answers
By
Dr. G. Balakrishnan
Assistant Professor
Department of Chemistry
Vivekananda College
Madurai, Tamil Nadu
Mail:mathi1bala1@gmail.com
2- ppt

2. Q1. An example of a molecule having three
centre bonds is
(a) B2H6
(b) BN
(c) H3BO3
(d) NaBH4

3. Q2. The shape of acetylene molecule is
(a) Tetrahedral
(b) Triangular
(c) Linear
(d) Square planar

4. Q3. Select the linear molecule from the
following.
(a) H2O
(b) O2
(c) BeCl2
(d) CH4

5. Q4. Which of the following is the O-O distance
minimum?
(a)O3
(b) O2
(c) H2O2
(d) Na2O2

6. Q5. Which one of the following molecules has
the highest bond order?
(a)He2 Bond order = 1
(b) N2 Bond order = 3
(c) O2 Bond order = 2
(d) F2 Bond order = 1

7. Q6. Which of the following molecules is more
ionic?
(a) LiH
(b) CsH
(c) HF
(d) HI
 According to the Fajan’s rule, larger the size of the
cation, greater will be its ionic character. Among the
given options Cs has the greatest size thus, has the
highest electropositive character. Also, the radius of
hydride and iodide anion are nearly the same.
Therefore, HI will be less ionic than CsH While
Covalent character of HF and LiH is very high due to
the difference in their electronegativity.
Thus, CsH will have the most ionic character.

8. Q7. In the diagram below, the orbital
represented is ?
(a) non-bonding
(b) Bonding ∏ orbital
(c) Bonding σ orbital
(d) anti-bonding ∏
orbital

9. Q8. Which one of the following is not viable
based on MO theory?
(a) He2
2+
(b) He2
2-
(c) H2
2-
(d) H2
+
Bond order is Zero,
it’s not exist

10. Q9. The Shape of IF7 molecule is
(a) Pentagonal bipyramidal (b) Square
bipyramidal
(c) Octahedral (d)
Pentagonal pyramidal

11. 10. The structure of XeF5
- ?anion as predicted
by VSEPR theory is
(a) Square pyramidal
(b) Pentagonal
planar
(c) Distorted
octahedron
(d) Octahedron

12. Q11. What is the bond order in NO+ ion?
(a) 1.5
(b) 2.0
(c) 2.5
(d) 3.0