how would you show that air is needed for combustion
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An simple activity to show that air is needed for combustion.
Activity :-
⭐Fix a candle on the table.
⭐Light the candle and observe the flame.
⭐Now take a glass chimney and place it as shown in the attached image. Observe the candle flame carefully.
⭐Now place a cardboard on the top of the chimney. Observe the flame.
⭐In the first case ( figure i ),the candle burns smoothly, because of sufficient supply of air from the atmosphere.
⭐In the second case ( figure ii ),the candle flame flickers and becomes sooty, as there is insufficient supply of air.
⭐In the third case ( figure iii ),the candle flame is put off because the supply of air is completely cut off.
⭐⭐⭐From the above (activity's)observations,we conclude that air is necessary for combustion.⭐⭐⭐
Activity :-
⭐Fix a candle on the table.
⭐Light the candle and observe the flame.
⭐Now take a glass chimney and place it as shown in the attached image. Observe the candle flame carefully.
⭐Now place a cardboard on the top of the chimney. Observe the flame.
⭐In the first case ( figure i ),the candle burns smoothly, because of sufficient supply of air from the atmosphere.
⭐In the second case ( figure ii ),the candle flame flickers and becomes sooty, as there is insufficient supply of air.
⭐In the third case ( figure iii ),the candle flame is put off because the supply of air is completely cut off.
⭐⭐⭐From the above (activity's)observations,we conclude that air is necessary for combustion.⭐⭐⭐
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