Q92 / 180 · AIIMS 2011 · Chemistry

Assertion : $R_3 \mathrm{P}=\mathrm{O}$ exists but $R_3 \mathrm{~N}=\mathrm{O}$ does not exist. Reason : $\mathrm{P}$ is more electronegative than $\mathrm{N}$.

  • 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.
  • Correct answer
    C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

The electronegativity of $\mathrm{N}(3.0)$ is much higher than $P(2.1)$.

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

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