Give the balanced chemical equation for the reaction between ammonia gas and hydrochloric acid.

Write a balanced chemical equation the following reaction:

Ammonium hydroxide is added to ferrous sulphate solution.

Name the gas evolved in the following case:

Ammonia reacts with heated copper oxide.

State one observation for the following:

Ammonia gas is passed over heated copper (II) oxide.

Identify the substance underlined:

The catalyst used to oxidise ammonia.

Write a balanced chemical equation for the following:

• Reaction of excess ammonia with chlorine.

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Formula of sal ammoniac is _____.

$\mathrm{A}. \mathrm{NaOH}$

$\mathrm{B}. {\mathrm{NH}}_4\mathrm{Cl}$

$\mathrm{C}. {\mathrm{NH}}_4{\mathrm{NO}}_3$

(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

• Nitrogen is obtained by passing ammonia over copper $\left(\mathrm{I}\mathrm{I}\right)$ oxide.

Give one chemical equation for the following case:

A compound is reduced by ammonia.