[aldoxime_amine]

An inorganic salt A when heated decomposes completely to give only 2 gases B and C. B is a neutral gas fairly soluble in water and itself decomposes on heating to 2 different gases D and E. A when warmed with NaOH gives another gas F, which turns mercurous nitrate paper black. After sometime the gas F ceases to evolve, however its supply is restored by treating residual solution with aluminium powder. Identify A to F and give relevant equations.

Ok, so F is ammonia. So A contains NH₄⁺. I know that NH₄⁺NO₃ gives N₂O and water on heating, while NH₄⁺NO₂ gives N₂ and water on heating. But I am not aware of the other reactions. And what does the last line mean (the aluminium powder thing?)

[Borek]

What happens to aluminum powder when it is treated with a strong base solution?

[aldoxime_amine]

probably meta aluminate formation...?

[Borek]

Try to write reaction equation - what is the other product?

[aldoxime_amine]

Possibly and very probably hydrogen but where does ammonia come into the picture?