MCQ
Colourless gas that has oxidising as well as reducing properties
  • A
    $CO_2$
  • $SO_2$
  • C
    $NO_2$
  • D
    $SO_3$

Answer

Correct option: B.
$SO_2$
b
$S \downarrow \,\overset {\operatorname{Re} ducing\,\,\,agent\,} \longleftrightarrow S{O_2} \uparrow \xrightarrow{{Oxidi\sin g\,\,agent\,}}SO_4^{2 - }(aq.)$

$SO_2$ is colourless gas.

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