Bond Energy MCQs

A bond is a force that holds atoms together. When atoms combine to form compounds and molecules, they achieve a more stable electronic configuration. This increased stability results in a reduction in the system’s chemical potential energy and the release of energy. To decompose a compound, energy must be added to break the chemical bonds holding the atoms together. The amount of energy required to break a chemical bond is known as bond energy. Bond energy is expressed in kilojoules per mole of bonds. Any change in atomic charge is precisely balanced by corresponding adjustments in internuclear distances to maintain consistent bond energy.

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

Which bond is most polar?

(a) N-F
(b) C-O
(c) O-F
(d) C-F

In which of the following molecules are the bond lengths around the central atom not equal?

(a) SF₆
(b) PF₅
(c) PCl₃
(d) BF₃

On the basis of the 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

Which one among the following has the highest bond order according to MO theory?

(a) BN
(b) CO
(c) F₂
(d) Ne₂

The energy 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

Back π donation exists in

(a) NF₃
(b) NH₃
(c) BF₃
(d) BF₄^–

The weak forces between molecules are called

(a) molecular forces
(b) intermolecular forces
(c) intramolecular forces
(d) extramolecular forces

In O-C-O, the bond angle is

(a) 180°
(b) 87.5°
(c) 120°
(d) 109.5°

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