PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

Book Free Demo
Oxygen is necessary for burning:
 
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Experimental set-up
  1. Place two candles on a table.
  2. Ensure that both the candles are of same size and height.
  3. Mark them as candle \(1\) and candle \(2\) using a chalk piece.
  4. Light both the candles.
  5. Now, cover candle \(2\) with glass tumbler as shown in the figure.
  6. Observe the happenings at both the candles.
What does happen to candle \(1\)?
 
The candle \(1\) , unless it is blown-off by . This is because fresh air is continuously available to the candle for its process.

What does happen to candle \(2\)?
 
Candle \(2\) and then .
 
Can you guess why did the covered candle extinguish?
 
When the burning candle is covered with a glass tumbler, the candle can use the available in the air inside the glass tumbler.
 
Since only a small amount of air is present inside the glass tumbler, only a small portion of is available for the candle to .
 
When all the of the air inside the gas jar is used up, then the burning candle .