# $NO_2$ combines with atmospheric moisture to form mixture of $2NO_2+H_2O\rightarrow x+y$.The x is

$\begin{array}{1 1}(a)\;HNO_2\\(b)\;HNO_3\\(c)\;HNO\\(d)\;HNO_4\end{array}$

Solution :
Mono-nitrogen oxides eventually form nitric acid when dissolved in atmospheric moisture, forming a component of acid rain.
This chemical reaction occurs when nitrogen dioxide reacts with water:
$2NO_2 +H_2O \to HNO_2 +HNO_3$
edited Oct 26, 2017 by meena.p