While doing activity in lab, teacher asked Radhika to burn nephthalein ball, Camphor, vegetable oil and Alcohal one by one with all precaution. Students observed that only ___ burns with blue flame being a saturated hydrocarbon.
Answers
Answer:
Alcohol and camphor are saturated hydrocarbon. Alcohol burns with a blue flame which show complete combustion. Camphor burn with a yellow flame.
Colour of the flame depends on the amount of carbon relative to others. The higher proportional carbon atom results in incomplete combustion. Naphthalene has five double bonds so it has more carbon atoms; camphor has one cyclic ring so lesser than naphthalene; while ethanol is completely saturated carbon compound without a cyclic ring. As a result, naphthalene has a sooty yellow flame while ethanol has a blue flame.We use Naphthalene to preserve cloth from microorganisms. It is an unsaturated compound with multiple double bonds. It burns in air and gives yellow smoke.
Answer:
alcohol................