Chemistry
State your observation – Water is added to the product formed, when Al is burnt in a jar of nitrogen gas.
Answer
When Al metal is burnt in a jar of nitrogen gas, its nitride i.e., AlN is formed. When warm water is added to AlN, it undergoes hydrolysis and is decomposed by warm water to give pungent smelling ammonia gas. The corresponding insoluble metal hydroxide (i.e., Al(OH)3) is precipitated out. The reactions are shown below:
2Al + N2 ⟶ 2AlN
AlN + 3H2O ⟶ Al(OH)3 + NH3 [g]
Related Questions
Name the gas produced when excess ammonia reacts with chlorine.
The diagram shows set up for the lab. preparation of a pungent alkaline gas.
(i) Name the gas collected in the jar.
(ii) Give a balanced equation for the above preparation
(iii) State how the above gas is collected?
(iv) Name the drying agent used.
(v) State how you will find out that the jar is full of the pungent gas?
Rewrite the correct statement with the missing word/s — Magnesium nitride reacts with water to liberate ammonia.
Write a balanced chemical equation – Chlorine reacts with excess of ammonia.