Question

What do you observe when manganese dioxide is treated with concentrated hcl?

Answer 1

Chlorine can be prepared by reacting HCl with MnO2. The reaction is represented by this equation.MnO2(s) + 4HCl(aq) → Cl2(g) + MnCl2(aq)

Answer 2

when magnesium dioxide react with conc.hcl to produce magnesium chloride and colourless gas of chlorine is produced.