Question

Two different aqueous (water-based) solutions are mixed in a test tube. If a chemical reaction occurs, what is LEAST likely to be observed?

A) a color change
B) bubbling and fuming
C) the formation of a flame
D) the formation of a solid precipitate

Answer 1

2KMnO₄(aq) + H₂O₂(aq) = 2MnO₂(s) + 2O₂ + 2KOH

A) a color change: violet - colourless
B) bubbling and fuming - O₂
D) the formation of a solid precipitate MnO₂(s)

⇒ LEAST C) the formation of a flame

Answer 2

the formation of a flame