Fuels such as coal and petroleum have some amount of ______ and _______ which causes pollution on combustion.

In the preparation of wood charcoal, liquid pyroligneous acid is obtained. It consists of:

Saturated hydrocarbons will generally give  ________.

The compounds which contain one or more triple bonds are called ________.

_________ affects the optic nerve, causing blindness.

Esters react in presence of an acid or a base to give back the alcohol and carboxylic acid, this reaction is called ________.

The gas used in welding and cutting metals is-

________ is the first molecule in the homologous series of alkanes.

_______ contains C - 60 which has carbon atoms arranged in the shape of a football.

When ethanol is heated with excess concentrated sulphuric acid at 443K results in the formation of _________.