Question

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12. मैग्नीशियम रिबन को जलाने से पहले साफ क्यों किया जाता है
Why should Mg ribbon be cleaned before burn
13. एक अधातु लिखें जिसमें चमक. होती है।
Name a non-metal that possesses lustuer. in Hindi​

Answer 1

Answer:

13.Magnesium ribbon should be cleaned with sandpaper before burning in the air. ... To remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon. Unwanted impurities deposited on the magnesium ribbon can be removed and only pure magnesium can be used for the reaction.

Answer 2

Answer:

Magnesium ribbon should be cleaned with sandpaper before burning in the air. ... To remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon. Unwanted impurities deposited on the magnesium ribbon can be removed and only pure magnesium can be used for the reaction.