Question

10. Arrange the following equations in the correct sequence to obtain a normal salt.

(1) Al(OH)Cl₂ + HCl → AlCl₃ + H₂O

(2) Al(OH)₃ + HCl → Al(OH)₂Cl + H₂O

(3) Al(OH)₂Cl + HCl → Al(OH)Cl₂ + H₂O

• A. 321
• B. 231
• C. 123
• D. 312

Answer 1

The correct option is B

231

Explanation for the correct option:-

(B) 231

Normal salts are those type of salt that contains no replaceable hydrogen ions in the salt.

$$\begin{gathered} \left(\mathrm{i}\right)\underset{\mathrm{Aluminium}\mathrm{hydroxide}}{\mathrm{Al}{\left(\mathrm{OH}\right)}_3}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{\mathrm{HCl}}\to \underset{\mathrm{Aluminium}\mathrm{chloride}\mathrm{hydroxide}}{\mathrm{Al}{\left(\mathrm{OH}\right)}_2\mathrm{Cl}}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}} \\ \left(\mathrm{ii}\right)\underset{\mathrm{Aluminium}\mathrm{chloride}\mathrm{hydroxide}}{\mathrm{Al}{\left(\mathrm{OH}\right)}_2\mathrm{Cl}}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{\mathrm{HCl}}\to \underset{\mathrm{Aluminium}\mathrm{dichloride}\mathrm{hydroxide}}{\mathrm{Al}\left(\mathrm{OH}\right){\mathrm{Cl}}_2}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}} \\ \left(\mathrm{iii}\right)\underset{\mathrm{Aluminium}\mathrm{dichloride}\mathrm{hydroxide}}{\mathrm{Al}\left(\mathrm{OH}\right){\mathrm{Cl}}_2}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{\mathrm{HCl}}\to \underset{\mathrm{Aluminum}\mathrm{chloride}}{{\mathrm{AlCl}}_3}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}} \end{gathered}$$

Hence, option (B) is the correct answer.