Question

On addition of conc. H2SO4 to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet fumes come out. This is because

Answer 1

HI formed during reaction is oxidized to I2 which is violet in colour.

Answer 2

Reaction of concentrated $H_2SO_4$ with chloride salt and Iodide salt.

Explanation:

• The given condition is when Conc. H2SO4 is added to a chloride salt, colorless fumes are evolved but in case of iodide salt, violet fumes come out.
• To find out the reason for this, let us take sodium chloride and sodium iodide as an examples.

Reaction of Conc. $H_2SO_4$ with NaCl

• When to sodium chloride salt Conc. $H_2SO_4$ is added it leads to the following reaction:

$2NaCl+H_2SO_4\rightarrow Na_2SO_4+2HCl$

• The formation of HCl gas accounts for the formation of colorless fumes.

Reaction of Conc. $H_2SO_4$ with NaI

• When to sodium iodide salt Conc. $H_2SO_4$ is added it leads to the following reaction:

$2NaI+H_2SO_4\rightarrow Na_2SO_4+2HI\stackrel{H_{2} S O_{4}}{\longrightarrow} 2 H_{2} O+S O_{2}+I_{2}$

• Due to the formation of iodine $(I_2)$ gas, the violet fumes are evolved during the reaction.

Learn more about such concept

Identify the cation and anionic radical in given unknown salt A by performing dry and wet test for cationic radical and anionic radical

https://brainly.in/question/2305489

Why potassium and sodium are not used to react with dilute hydrochloric acid or dilute sulfuric acid in the laboratory preparation of hydrogen

https://brainly.in/question/2802208