PDF chapter test TRY NOW
Oxygen is necessary for burning:
Experimental set-up
- Place two candles on a table.
- Ensure that both the candles are of same size and height.
- Mark them as candle \(1\) and candle \(2\) using a chalk piece.
- Light both the candles.
- Now, cover candle \(2\) with glass tumbler as shown in the figure.
- 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 .
Register for free to see more content