Question

Select from the following a statement which is not true about burning of magnesium ribbon in air:

(A) It burns with a dazzling white flame.

(B) A white powder is formed on burning.

(C) It is an endothermic reaction.

(D) It is an example of a combination reaction.

Answer 1

Correct option is : (C) It is an endothermic reaction.

• Burning of magnesium ribbon is an exothermic reaction, as it releases heat and light.
• It burns with a dazzling white flame, forming magnesium oxide (white powder).
• It is a combination reaction because \(Mg+ O_2 \rightarrow MgO\) involves the combination of magnesium and oxygen.