As far as I know NONE..... Explanation: Sodium peroxide can be thermolyzed to give dioxygen gas... N a 2 O 2 ( s ) + Δ → N a 2 O ( s ) + 1 2 O 2 ( g ) ↑ ⏐ ⏐ ⏐
But with water, we simply get an acid base reaction.... N a 2 O 2 ( s ) + 2 H 2 O ( l ) → 2 N a O H ( a q ) + H 2 O 2 ( a q ) ...