Assertion : Sodium formate has both the $\mathrm{C}-\mathrm{O}$ bonds have same value $1.27 Å$. Reason: Equal bond length is due to the phenomenon of resonance.

• Correct answer
  A

  If both assertion and reason are true and reason is the correct explanation of assertion
• B

  If both assertion and reason are true but reason is not the correct explanation of assertion
• C

  If assertion is true but reason is false
• D

  If both assertion and reason are false.

Solution

Formate ion shows resonance and gives rise to identical bond lengths.

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