MCQs on Bond Energy
1. Which bond is most polar?
(a) N-F
(b) C-O
(c) O-F
(d) C-F
Answer:::: (d)
2. On the basis of octet rule, which bond is not present in gaseous nitrogen pentoxide molecule?
(a) covalent bonds
(b) coordinate bond
(c) electrovalent bond
(d) both electrovalent and coordinate bonds
Answer:::: (c)
3. Back pi donation exist in
(a) NF3
(b) NH3
(c) BF3
(d) BF4–
Answer:::: (c)
4. What is correct about bond order?
(a) it always has an integral value
(b) it can have any value positive, integral or fraction including zero
(c) it can have any value greater than zero
(d) all the above statements are correct
Answer:::: (b)
5. In which of the following molecules, the bond lengths around the central atom are not equal?
(a) SF6
(b) PF5
(c) PCl3
(d) BF3
Answer:::: (b)
6. Which one among the following has the highest bond order according to MO theory?
(a) BN
(b) CO
(c) F2
(d) Ne2
Answer:::: (b)
7. The weak forces between molecules are called
(a) molecular forces
(b) intermolecular forces
(c) intramolecular forces
(d) extramolecular forces
Answer:::: (b)
8. Bond energy refers to the
(a) energy required to make a mole of a compound
(b) energy required to break a mole of a compound
(c) energy required to carry out sublimation
(d) none of the above
Answer:::: (b)
9. In O-C-O the bond angle is
(a) 180o
(b) 87.5o
(c) 120o
(d) 109.5o
Answer:::: (a)
10. The energy which is required to break 1 mole of a given bond is called
(a) bond energy
(b) molar energy
(c) molar bond energy
(d) bond breaking energy
Answer:::: (a)
