Question

What are the chemicals used in the laboratory preparation of chlorine?

• A. Potassium permanganate
  
• B. Hydrochloric acid
  
• C. Potassium chloride
  
• D. Carbonic acid
  

Answer 1

Answer: (A), (B)

The correct options are
A Potassium permanganate

B Hydrochloric acid


Chlorine gas is prepared in the lab using potassium permanganate and hydrochloric acid. When the dark purple powders of the potassium permanganate salt
($KMn{O}_4$) reacts with hydrochloric acid ($HCl$), potassium chloride, manganese chloride, water and chlorine is produced as products.
$2KMn{O}_4+16HCl\to 2KCl+2MnC{l}_2+8H_{2}O+5C{l}_2$