Amongst the following, the number of oxide(s) which are paramagnetic in nature is
$N a_{2} O, K O_{2}, N O_{2}, N_{2} O, C l O_{2}, N O, S O_{2}, C l_{2} O$

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answer is 4.

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Detailed Solution

4) Among the given , oxides which are paramagnetic are
$K O_{2}, N O_{2}, C l O_{2}, N O$
$\begin{array}{l} K O_{2} = 1 + 6 + 6 = 13 \\ N O_{2} = 5 + 6 + 6 = 17 \end{array}$
$\begin{array}{l} C l O_{2} = 7 + 6 + 6 = 19 \\ N O = 5 + 6 = 11 \end{array}$
Among the given oxides which are diamagnetic are
$N a_{2} O, N_{2} O, S O_{2}, C l_{2} O .$
$\begin{array}{l} N a_{2} O = 1 + 1 + 6 = 8 \\ N_{2} O = 5 + 5 + 6 = 16 \\ S O_{2} = 6 + 6 + 6 = 18 \\ C l_{2} O = 7 + 7 + 6 = 20 \end{array}$
There are total four oxides which are paramagnetic in nature .