MCQ
The incorrect statements among the following is
  • A
    $PH _3$ shows lower proton affinity than $NH _3$.
  • B
    $PF _3$ exists but $NF _5$ does not.
  • C
    $NO _2$ can dimerise easily.
  • $SO _2$ can act as an oxidizing agent, but not as a reducing agent.

Answer

Correct option: D.
$SO _2$ can act as an oxidizing agent, but not as a reducing agent.
(D)
$SO _2$ can oxidise as well as reduce.
Hence it can act as both oxidising and reducing agent.

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