When a burning magnesium ribbon is introduced in a gas jar containing oxygen, it will burn with :
(1) a reddish flame
(2) a pale blue flame
(3) a golden yellow flame
(4) a dazzling white flame

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Solution

Magnesium has a high affinity for oxygen, therefore magnesium reacts with oxygen to form magnesium oxide.
$2 Mg + O_{2} \to 2 MgO$
This formation of MgO imparts dazzling white flame.

Hence, the correct answer is option 4.

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Similar questions

What is a redox reaction ? When a magnesium ribbon burns in air with a dazzling flame and forms a white ash, is magnesium oxidised or reduced ?

Statement 1: Magnesium burns in air with a dazzling white flame.
Statement 2: Metal + Water $\to$ Metal oxide + Hydrogen

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