chapter 4 carbon and its compound dec 2015 | Page 7

3.

If a suffix is added, then final ‘e’ is removed from the name eg. methanol
(methane-e = methan + ol).

Chemical properties of Carbon compounds :
1.

COMBUSTION :

*Carbon compounds generally burn (oxidize) in air to produce carbon dioxide and
water, and release heat and light energy.
CH4 + O2 → CO2 + H2O + heat and light
*Saturated hydrocarbon burns generally with a blue flame in good supply or air and
with a yellow sooty flame in limited supply of air.
*Sooty flame is seen when unsaturated hydrocarbons are burnt.
*Burning of coal and petroleum emits oxides of sulphur and nitrogen which are
responsible for acid rain.
2.

OXIDATION :

*Alcohols can be converted to carboxylic acids by oxidizing them using alkaline
potassium permanganate or acidified poatassium dichromate (they add oxygen to
the reactant, thus are called oxidizing agents).
CH 3 - CH 2 OH

3.

Alkaline KMnO 4 + heat
CH 3 COOH
Acidified K 2 Cr2 O7 + heat

ADDITION REACTION:

H