Question

1. Describe an activity to show that a candle burns to give water vapour, carbon dioxide and soul
2. Describe a candie flame
3. Mention five factors (apart from easy availability at a reasonable price) which should be
considered while choosing a fuel.​

Answer 1

Answer:

1.An activity that demonstrates that soot, water vapour and carbon dioxide is formed on combustion is as follows: Light a candle and fix it on the table and cover it with a glass chimney. Let the candle burn till it is extinguished. Observe the changes and presence of new substances in the chimney

2. Candles produce light by releasing heat and all the turn on the candle produces come from a chemical reaction known as combustion in which wax reacts with oxygen in the air to produce carbon dioxide. Flame is defined as the area of combustion of a combustible substance