15.Assertion :Magnesium ribbon should be cleaned before
burning in air.
Reason: Magnesium ribbon coated with a thin layer of dust
containing moisturizer.
Answers
The magnesium ribbon should be cleaned before burning in air because the layer of magnesium oxide (which is formed due to the reaction of magnesium with air) can be removed in order to get the desired chemical reaction.
Also, in order to remove the oxide layer, the presence of which slowdowns the oxidation process. So, by cleaning it, the burning process takes place easily.
Answer:
Both reason and assertion is correct.
Explanation:
From the above question,
They have given :
Assertion : Magnesium ribbon should be cleaned before burning in air.
Reason: Magnesium ribbon coated with a thin layer of dust containing moisturizer.
The assertion and the reason are correct. Magnesium ribbon is a highly reactive metal and readily reacts with oxygen, moisture, and other substances present in the air. If the magnesium ribbon is coated with a thin layer of dust or any other substance, it can prevent or slow down the reaction of magnesium with oxygen, resulting in an incomplete combustion.
Therefore,
It is important to clean the magnesium ribbon before burning it in air to ensure that it reacts completely and produces a bright, intense flame. This will also make it easier to observe the reaction and its properties.
Both reason and assertion is correct.
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