Question

$HCl$ can be prepared by:
A) $NaCl + {H_2}S{O_4}\overrightarrow {420K} $
B) $NaHS{O_4} + NaCl\overrightarrow {823K} $
C) $NaN{O_3} + {H_2}S{O_4} \to $
D) Both (A) and (B)

Answer 1

Hint: At room temperature and humidity, hydrogen chloride (HCl) is a gas made up of the components hydrogen and chlorine.The hydrogen and chlorine in each molecule of HCl are in a one-to-one ratio. HCl is a colourless, radioactive gas at room temperature.

Complete answer:
The following are some of the methods for processing hydrogen chloride:
Chlorine and hydrogen reactions;
alkali chloride (sodium or potassium chloride) reactions with sulfuric acid (Manheim mechanical muffle furnaces ) or sulphur dioxide, oil, and air (Hargreaves process).
Now, let us examine each of the options:
Option (A)
Sulfuric acid reacts with sodium chloride to form sodium sulphate and hydrogen chloride.sulfuric acid is a concenterated solution. In a boiling solution, this reaction takes place.
$NaCl + {H_2}S{O_4}\underrightarrow {420k}NaHS{O_4} + HCl$
Hence, This option is correct.
Option (B)
Sodium sulphate and hydrogen chloride are formed when sodium chloride reacts with sodium bisulfate. The temperature for this reaction is 450-800°C (450-600°C).
$NaHS{O_4} + NaCl\underrightarrow {823k}N{a_2}S{O_4} + HCl$
Hence, this option is correct.
Option (C)
Nitric acid and sodium bisulfate are formed when sodium nitrate reacts with sulfuric acid. sulfuric acid is a concentrated solution.
$NaN{O_3} + {H_2}S{O_4} \to HN{O_3} + NaHS{O_4}$
Since, this reaction doesn’t produce $HCl$. Therefore, this option is incorrect.
Hence, we conclude that Option (D) Both (A) and (B) is correct.

Note:
Many factories produce large quantities of hydrogen chloride as a byproduct. Processes for removing different impurities from by-produced hydrogen chloride are identified and evaluated. Pickling steel is one of the most popular uses for hydrochloric acid.