State your observation for the following case:
Ammonia gas is burnt in an atmosphere of oxygen in the absence of a catalyst.

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Solution

Reaction of ammonia $({NH}_{3})$ with oxygen $(O_{2})$ :
Ammonia on reacting with water gives free nitrogen $(N_{2})$ and water $(H_{2} O)$ .
$4 {NH}_{3} (g) + 3 O_{2} (g) ⟶ 2 N_{2} (g) ↑ + 6 H_{2} O (l) + Heat$
Therefore, when ammonia gas is burnt in an atmosphere of oxygen in the absence of a catalyst:
free nitrogen and water are formed.
The reaction is irreversible and strongly exothermic.
Mixture of nitrogen with oxygen is explosive and, therefore, dangerous.

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Similar questions

Name the catalyst in the given case and write the chemical equation for:

Action of ammonia gas with oxygen

Name :

(a) the gas which is prepared by Haber's Process,

(b) two gases which give dense white fumes with ammonia,

(i) dry cell (ii) explosives (iii) medicine,

(d) an acidic gas which reacts with a basic gas liberating a neutral gas,

(e) a metallic chloride soluble in ammonium hydroxide,

(f) the gas obtained when ammoia burns in an atmosphere of oxygen without any catalyst,

(g) a nitride of a divalent metal which reacts with warm water liberating ammonia,

(h) an amphoteric oxide reduced by the basic gas,

(i) a white salt produced by an acid gas and a basic gas.

State your observation for the following cases:

Ammonia gas is burnt in an atmosphere of oxygen in the absence of a catalyst.

9. State one relevant observation for the following: When ammonia gas is burnt in an atmosphere of excess oxygen.

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