Give scientific reasons for the following statements : (1) Candle burns with a yellow flame.

Give scientific reasons for the following statements : (1) Candle bur

1.	Give scientific reasons for the following statements : (1) Candle burns with a yellow flame.
Answer» SOLUTION :Candle is made-up of wax, which consists of saturated hydrocarbons containing 18 to 20 carbon atoms. When a candle is lighted (ignited), the wax melts which rises up the wick and GETS covered by vapour. As a result, there is no proper MIXING of `O_(2)` of air and wax vapours. Therefore, here incomplete combustion of wax takes place, and COMPLETE combustion of wax does not take place. Furthermore, incomplete combustion of wax produces unburnt carbon particles, which rise up in the flame, get heated and imparts yellow COLOUR to the flame.