When a Bunsen burner is lit below wire gauze, it is noted that the flame initially burns below the gauze as shown in figure 5(i). After some time, the flame burns below as well as above the gauze as shown in figure 5(ii)

Explain the observation.

Answer:

- Initially, the wire gauze conducts heat away so that the gas above does not attain the ignition temperature. When the wire gauze becomes red hot, the gas above attains ignition point and starts burning.

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When a Bunsen burner is lit below wire gauze, it is noted that the flame initially burns below the gauze as shown in figure 5(i). After some time, the flame burns below as well as above the gauze as shown in figure 5(ii) Explain the observation.

When a Bunsen burner is lit below wire gauze, it is noted that the flame initially burns below the gauze as shown in figure 5(i). After some time, the flame burns below as well as above the gauze as shown in figure 5(ii)

Explain the observation.