A gaseous substance dissolves in water giving a pale blue solution which decolourises KMnO_(4) and oxidises KI to I_(2). Gaseous substance is

A gaseous substance dissolves in water giving a pale blue solution whi

1.	A gaseous substance dissolves in water giving a pale blue solution which decolourises KMnO_(4) and oxidises KI to I_(2). Gaseous substance is
Answer» `N_(2)O_(5)` `NH_(3)` `N_(2)O_(3)` `HNO_(3)` SOLUTION :`N_(2)O_(3)` dissolves in `H_(2)O` to give a mixture of `HNO_(3)andHNO_(2).HNO_(2)` being a reducing agent decolourises `KMnO_(4)` solution. Both `HNO_(3)andHNO_(2)` act as oxidising agents and HENCE osxidise KI OT `I_(2)`.