Heating with carbon in absence of air is known as

Conversion of high molecular weight hydrocarbons into low molecular weight hydrocarbons in te absence of air is known as

The process of removing impurities caused by sulphur, by heating the ore in presence of air is known as -

The thermal decomposition of alkanes in the absence of air is known as -

The thermal decomposition of alkanes in the absence of air is known as:

The process of heating the ore in the absence of oxygen is known as .....