Question

Which of the following observations regarding Manganese Dioxide test is correct?

• A. Evolution of a green gas
• B. Biproducts are chlorine and water
• C. The salt obtained is $MgC{l}_2$
• D. Biproducts are chlorine and hydrogen

Answer 1

Answer: (A), (B), (C)

The correct options are
A Evolution of a green gas
B Biproducts are chlorine and water
C The salt obtained is $MgC{l}_2$

The products obtained on the reaction of manganese dioxide with HCl are mangnese chloride $MnC{l}_2$, water and chlorine gas. This chlorine gas evolved has a characteristic green colour.
$Mn{O}_2\left(aq\right)+HCl\to MnC{l}_2+H_{2}O+C{l}_2$