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 .