Pure nitrogen is prepared in the laboratory by heating a mixture of

Question

$\textbf{Reduction potential of ions are given below:}$
\[ \begin{array}{ccc} \text{ClO}_4^- & \text{IO}_4^- & \text{BrO}_4^- \\ E^\circ = 1.19 \, \text{V} & E^\circ = 1.65 \, \text{V} & E^\circ = 1.74 \, \text{V} \\ \end{array} \]
The correct order of their oxidising power is:

Answer 1

To prepare pure nitrogen gas in the laboratory, a common method involves the reaction of NH_4Cl (ammonium chloride) and NaNO_2 (sodium nitrite). The chemical equation for this reaction is:

NH_4Cl + NaNO_2 \rightarrow N_2(g) + 2H_2O + NaCl

Let's break down this reaction to understand why it produces pure nitrogen gas:

Reactants: NH_4Cl and NaNO_2 are the reactants. When these two compounds are heated together, they undergo a decomposition reaction.
Decomposition of Ammonium Nitrite: The mixture of NH_4Cl and NaNO_2 decomposes to form nitrogen gas, water, and sodium chloride. The nitrogen gas released is colorless and odorless.
Products: The products of this reaction are nitrogen gas (N_2), water (H_2O), and sodium chloride (NaCl). Among these, only nitrogen is a gaseous product, making it easy to collect and purify.

The other options presented do not efficiently yield nitrogen gas:

NH_4OH + NaCl: This combination does not effectively produce nitrogen gas.
NH_4NO_3 + NaCl: This mixture also does not readily produce nitrogen gas upon heating.
NH_4Cl + NaOH: This combination typically produces ammonia gas and water, not nitrogen.

Therefore, the correct choice is NH_4Cl + NaNO_2 for preparing pure nitrogen gas in the laboratory.

Answer 2

To prepare pure nitrogen gas in the laboratory, a common method involves the reaction of NH_4Cl (ammonium chloride) and NaNO_2 (sodium nitrite). The chemical equation for this reaction is:

NH_4Cl + NaNO_2 \rightarrow N_2(g) + 2H_2O + NaCl

Let's break down this reaction to understand why it produces pure nitrogen gas:

Reactants: NH_4Cl and NaNO_2 are the reactants. When these two compounds are heated together, they undergo a decomposition reaction.
Decomposition of Ammonium Nitrite: The mixture of NH_4Cl and NaNO_2 decomposes to form nitrogen gas, water, and sodium chloride. The nitrogen gas released is colorless and odorless.
Products: The products of this reaction are nitrogen gas (N_2), water (H_2O), and sodium chloride (NaCl). Among these, only nitrogen is a gaseous product, making it easy to collect and purify.

The other options presented do not efficiently yield nitrogen gas:

NH_4OH + NaCl: This combination does not effectively produce nitrogen gas.
NH_4NO_3 + NaCl: This mixture also does not readily produce nitrogen gas upon heating.
NH_4Cl + NaOH: This combination typically produces ammonia gas and water, not nitrogen.

Therefore, the correct choice is NH_4Cl + NaNO_2 for preparing pure nitrogen gas in the laboratory.

Pure nitrogen is prepared in the laboratory by heating a mixture of

The Correct Option is D

Solution and Explanation

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