which metal nitrate which decomposes on heating liberating gas only
Answers
HELLO THERE!
"All reactions involving Heating of Nitrate salts are very important".
According to your question, you are asking for a nitrate, which evolves only gas (no residue) on heating.
The answer is Ammonium nitrate.
It is a very explosive substance, and when it is heated, the following reaction takes place:
NH₄NO₃ ------> N₂O (g) + 2H₂O (g)
Thus, a sweet smelling (but poisonous) gas, Nitrous oxide evolves, and water vapour, evolves along with it. There is no solid or liquid residue.
In laboratory, practically students are not allowed to do this experiment because:
=> Ammonium nitrate is too explosive, it can explode causing injuries.
=> The nitric oxide gas evolved is poisonous and harms the respiratory system.
HOPE MY ANSWER IS SATISFACTORY..
Thanks!