Single Choice

Which has higher bond energy and stronger bond?

A$$F_2$$
B$$ Cl_2$$
Correct Answer
C$$ Br_2 $$
D$$ I_2 $$

Solution

Bond dissociation energy $${ Cl }_{ 2 }>{ Br }_{ 2 }>{ F }_{ 2 }\ge { I }_{ 2 }$$ The general trend of bond strength is that it decreases down the group. But, $$F_2$$ shows exceptionally low bond enthalpy. This is due to the more interelectronic repulsion of the electron on $${ F }_{ 2 }$$ (small size) there is a weak bond between $$F-F$$, So it is easy to break.

SIMILAR QUESTIONS

Chemical Bonding

Which of the following statement is true?

Chemical Bonding

The average $$S-F$$ bond energy in $$SF_6$$ if the $$\Delta H^o_f$$ values are $$-1100,\ +275$$ and $$+80$$ kJ/mol respectively for $$SF_6$$(g), $$S$$(g) and $$F$$(g) is:

Chemical Bonding

Strongest $$C-C$$ bond is present in:

Chemical Bonding

Arrange the following bonds according to their average bond energies in descending order : $$C - Cl$$, $$C-Br$$, $$C-F$$, $$C-I$$

Chemical Bonding

Arrange the following in order of increasing bond dissociation enthalpy. H−H, D−D and F−F

Chemical Bonding

Which of the following will be the strongest bond?

Chemical Bonding

Match the bond enthalpies given in column II with the molecules given in column I and mark the appropriate choice. Column I Column II (A) Hydrogen $$(H_2)$$ (i) 498.0 kJ $$mol^{-1}$$ (B) Oxygen $$(O_2)$$ (ii) 946.0 KJ $$mol^{-1}$$ (C) Nitrogen $$(N_2)$$ (iii) 435.8 kJ $$mol^{-1}$$

Chemical Bonding

In a bonded molecule, the order of repulsion between the bonded and non-bonded electrons is:

Chemical Bonding

Which of the following species absorb maximum energy in its HOMO-LUMO electronic transition?

Chemical Bonding

Which of the following bonds has the highest bond energy?

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