Question

When $\mathrm { KClO } _ { 3 }$ is heated, it decomposes into$\mathrm { KCl } + \mathrm { O } _ { 2 }$. If some $\mathrm { MnO } _ { 2 }$ is added, the reaction goes much faster because.

• A. $\mathrm { MnO } _ { 2 }$ decomposes to give $O _ { 2 }$
• B. $\mathrm { MnO } _ { 2 }$ provides heat by reacting
• C. Better contact is provided by $\mathrm { MnO } _ { 2 }$
• D. $\mathrm { MnO } _ { 2 }$ acts as a catalyst

Answer 1

Answer: (D)

$\mathrm { MnO } _ { 2 }$ acts as a catalyst

Answer 2

$2 \mathrm { KClO } _ { 3 } \xrightarrow { \mathrm { MnO } _ { 2 } } 2 \mathrm { KCl } + 3 \mathrm { O } _ { 2 }$