Question

what is the action of chlorine (a) cold & dilute sulfuric acid (b) hot & concentrated sulfuric acid​

Answer 1

Explanation:

a )cold and dilute sulfuric acid

b) hot and conc.""

Answer 2

Action of chlorine (a) cold & dilute sulfuric acid (b) hot & concentrated sulfuric acid​ is different.

Explanation:

Action of chlorine (a) cold & dilute sulfuric acid

When chlorine is passed through cold and dilute sulfuric acid solution, a mixture of sodium hypochlorite and sodium chloride is formed.

$Cl2 +NaOH ------- NaCl +NaOCl + H2O$

Action of chlorine (b) hot & concentrated sulfuric acid​

Sulphuric acid reacts with $KClO3$ to form $KHSO4$, $HClO4$ and $ClO2$.

Here  Potassium chlorate will react with sulfuric acid inorder to produce potassium bisulfate, chlorine dioxide, potassium perchlorate and water.