What happens to the matchstick when it is introduced in the inner zone and more zone of the candle flame give reason to support your answer?
Answers
Light a candle (Caution : Be careful). Hold a glass tube with a pair of tongs and introduce its one end in the dark zone of a non-flickering candle flame. Bring a lighted matchstick near the other end of the glass tube. You will see the flame. Notice that the wax near the heated wick melts quickly.
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The substances which vapourise during burning, give flames. For example, kerosene oil and molten wax rise through the wick and are vapourised during burning and form flames. Charcoal, on the other hand, does not vapourise and so does not produce a flame. In the above activity, The vapours of wax coming out of the glass tube could be the cause of the flame produced.
When the candle flame is steady, introduce a clean glass plate/slide into the luminous zone of the flame . Hold it there with a pair of tongs for about 10 seconds. Then remove it.
A circular blackish ring is formed on the glass plate/slide. It indicates the deposition of unburnt carbon particles present in the luminous zone of the flame. Hold a thin long copper wire just inside the flame for about 30 seconds.
Notice that the portion of the copper wire just outside the flame gets red hot. It indicate that the non-luminous zone of the flame has a high temperature. In fact, this part of the flame is the hottest part.
Goldsmiths blow the outermost zone of a flame with a metallic blow-pipe for melting gold and silver . They use the outermost zone of the flame.
There are several "zones" within a non-luminous flame, and each zone has a different temperature. The outermost zone of the flame is blue in colour and it is the hottest part. This is due to complete combustion. The middle zone is moderately hot and is yellow in colour. This is because of partial combustion. The innermost zone is the least hot and black in colour. This is due to the presence of unburned wax vapours.
Answer:
Turn on a candle (Caution : Be careful). Holding a glass tube with a pair of tongs, place one end of it in the area of a candle flame that is not flickering. Bring a lit matchstick to the glass tube's opposite end. The flame will be seen. Take note of how soon the wax melts close to the hot wick.
,Flames are produced by chemicals that vapourize during combustion. For instance, when burning, kerosene oil and molten wax ascend through the wick, vapourize, and create flames. On the other hand, charcoal does not vapourize and does not result in a flame. The wax vapours that are escaping from the glass tube in the aforementioned action may be what ignited the flame.
Explanation:
The Make-Up of a Flame
Turn on a candle (Caution : Be careful). Holding a glass tube with a pair of tongs, place one end of it in the area of a candle flame that is not flickering. Bring a lit matchstick to the glass tube's opposite end. The flame will be seen. Take note of how soon the wax melts close to the hot wick.
Flames are produced by chemicals that vapourize during combustion. For instance, when burning, kerosene oil and molten wax ascend through the wick, vapourize, and create flames. On the other hand, charcoal does not vapourize and does not result in a flame. The wax vapours that are escaping from the glass tube in the aforementioned action may be what ignited the flame.
Introduce a clean glass plate or slide into the bright region of the candle flame when it is steady. With a pair of tongs, hold it there for around 10 seconds. then take it out.
On the glass plate/slide, a ring-shaped, dark-brownish formation develops. It denotes the accumulation of unburned carbon particles that are present in the flame's luminous zone. For around 30 seconds, keep a thin, long copper wire slightly inside the flame.
Take note of how the copper wire's section that is closest to the flame becomes extremely hot. It shows that the flame's non-luminous region has a high temperature. This area of the flame is actually the hottest one.
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