Alkane | Sources and methods of Preparation of Alkane | ch#12 | 10th class chemistry

Alkane | Sources and methods of Preparation of Alkane | ch#12 | 10th class chemistry #10classchemistryonlinelectures #mpluschemistry 10th class chemistry lectures matric part 2 chemistry lectures m plus chemistry lectures by majid ali chapter number 12, 10t class chemistry hydrocarbons lectures in 10th class chemistry lectures on 10th class chemistry alkane, alkene and alkynes in 10th class chemistry punjab text book 10th class chemistry ALKANES The simplest hydrocarbons are alkanes. In these compounds, all the bonds of carbon atoms are single that means valencies of carbon atoms are saturated. Therefore, they are least reactive. That is the reason, alkanes are called paraffins (para means less, and affins means affinity or reactivity) Sources of Alkanes 1. The main sources of alkanes are petroleum and natural gas. 2. Methane forms about 85% of natural gas. 3. All the alkanes are obtained commercially by the fractional distillation of crude petroleum. 4. Marsh gas is formed by the bacterial decay of vegetable matter contains mostly methane. 5. Fuel gases obtained from coal gas contain alkanes in small amounts. 6. Methane occurs in gobar gas, sewage gas and biogas which are formed by the decomposition of cattle dung, excreta and plant wastes