Q58 / 200 · NEET 2002 · Chemistry

Which of the following statement is true?

  • A
    Silicon exhibits 4 coordination numbers in its compound
  • Correct answer
    B
    Bond energy of $\mathrm{F}_2$ is less than $\mathrm{Cl}_2$
  • C
    $\mathrm{Mn}$ (III) oxidation state is more stable than $\mathrm{Mn}(\mathrm{II})$ in an aqueous state
  • D
    Elements of 15 th group show only +3 and +5 oxidation states

Solution

Fluorine is an exception due to its extremely small size. The F-F bond length is so short that the lone pairs of electrons on the fluorine atoms repel each other and weakens the F-F bond. The order of Bond energy is, $\mathrm{Cl}_2>$ $\mathrm{Br}_2>\mathrm{F}_2>\mathrm{I}_2$

Hence, the correct answer is option: 'B'.

Relevant Questions