Question

An easy way of obtaining Cl₂ gas in the laboratory is    

1. By heating NaCl and conc.  H₂ SO₄   

2. By heating NaCl and   MnO₂      

3. By mixing HCl and   KMnO₄   

4. By passing   F₂ through NaCl solution  

Answer 1

3. By mixing HCl and   KMnO₄