Questions

We know that polar substances are soluble in polar solvents and non polar substances are soluble in non-polar solvents only. Here the hydrocarbons are non-polar molecular substances and water is a polar solvent. So water can't dissolve hydrocabons.

Hence, as hydrocarbons are non-polar substances, they are insoluble in water as it is a highly polar solvent. 

Clay is an example of Aquiclude.

Ragini

Gautamiputra Satakarni has been described as the "destroyer of the Sakas, the Yavanas and the Pallavas".

The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.

A bureaucracy is a way of administratively organizing large numbers of people who need to work together.

The term bureaucracy literally means "rule by desks or offices".

Organizations in the public and private sector, including universities and governments, rely on bureaucracies to function.