1.

Which of the following statements is/are incorrect ?A. Ammonia is oxidised to `NO_2` by oxygen at `800^@C` in presence of a catalyst platinumB. Nitric acid on standing slowly turns yellowC. Colloidal sulphur is formed when `H_2S` gas is passed through nitric acid solutionD. `N_2O_3` gas dissolves in water giving a pale blue solution

Answer» Correct Answer - A
(A)`2NH_3+5O_2underset(800^@C)overset(Pt)to2NO+3H_2O`
(B)Due to the formation of `NO_2` according to following reactions
`3HNO_3 to HNO_2 + 2NO_2 + H_2O +O_2`
(C )`H_2S+[O]toH_2O+S,[O]` from `HNO_3`
(D)`N_2O_3+H_2Oto2HNO_2`


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