Fix a lighted candle on a table. Put a glass chimney over the candle and rest it on a few wooden
blocks in such a way that air can enter the chimney. Observe what happens to the flame. The lighted
candle keeps burning because it is getting continuous supply of air from the surroundings. Now
remove the blocks and let the chimney rest on the table. Again observe the flame. In this condition
the lighted candle does not get supply of air from the below and the candle flickers and produce
smoke. Finally, put a glass plate over the chimney. Watch the flame again. In this condition the
lighted candle finally goes off because the air is not available to the lighted candle.
(i) What happens in the three cases?
(ii) When does the flame flickers off?
(iii) What is the role of wooden block in this activity?
(iv) Can you infer anything at all about the role played by air in the process of burning?
Answers
Answer:
The emissions from paraffin candles contain many of the same toxins produced by burning diesel fuel. ... On the personal health side of things, lighting many candles frequently in an unventilated space can lead to problems such as aggravating asthma, causing allergy-like symptoms, or irritating the respiratory tract.06-Aug-2019
A scented candle, made with fragrant oils mixed into the wax, gives off a pleasant aroma when burning. ... Unlike incense, scented candles do not add smoke to the air. Unlike incense, most scented candles do not produce smoke. There are many different ways to make a scented candle.
In the developed world today, candles are used mainly for their aesthetic value and scent, particularly to set a soft, warm, or romantic ambiance, for emergency lighting during electrical power failures, and for religious or ritual purposes.
Explanation:
The earliest use of candles is often attributed to the Ancient Egyptians, who made rushlights or torches by soaking the pithy core of reeds in melted animal fat.
Burning candles releases volatile organic compounds and particulate matter into the air. Particulate matter is a mixture of extremely small liquid droplets and particles that can enter your lungs. There's concern that extended exposure to particulate matter can lead to heart and lung problems.