Question

Which material forms in sediments and is a precursor to hydrocarbons? Please explain.

Answer 1

Answer:

Option (C)- Kerogen

Explanation:

The Kerogen is usually the complex type of waxy mixture made up of compounds containing hydrogen and carbon. These hydrocarbons are the main organic elements that are present in the oil shale. It is basically comprised of paraffin hydrocarbons. In addition to this, they also contain some amount of nitrogen and sulphur in their solid mixture. This kerogen usually forms in the sediments that occur prior to the formation of hydrocarbons.

Further explanation:

Kerogens are the compounds of hydrocarbons that do not dissolve when mixed with water and other organic solvents namely alcohol or benzene. These molecules of paraffin usually dissociates into gases and liquid substances (like petroleum) when heated under a certain pressure condition, which can be again recollected. The presence of this property allows the oil shale to form a significant amount of crude oil.

These kerogens are predicted to have created from the solidified and lithified materials that are organic in nature. These organic materials include algae and other variety of plant lives which were gathered at the bottom of the ancient seas and ocean bodies about millions of years ago. These are formed under the deep marine condition. Petroleum also is formed in this way.

The hydrocarbons are generated after the formation of these kerogens in the sediments that combines to form sedimentary rocks over millions of years. These kerogens if provided the necessary condition such as increased pressure and temperature condition, form hydrocarbons such as petroleum, crude oil, and natural gas.

Learn more:

1. Oil shale and kerogen brainly.com/question/5864789  (answer by Flyyboyy25oxbb32)  

2. crude oil and its formation brainly.com/question/8121346  (answer by Peterdaly)

Keywords:

Kerogen, Wavy mixture, Hydrocarbons, Paraffin, Petroleum, Crude oil, Lithification, Natural gas, Sedimentary rocks.

Answer 2

Answer:

C. Kerogen

Explanation:

Keorgen is an organic matter usually found in sedimentary rock. It is widely regarded as the precursor to oil and natural gas.

Keorgens are the constituent of source rocks from which oil is derieved at appropriate temperature and pressure.

Kerogens are formed when organic matter are rapidly buried in anoxic environments ie. environments that lacks oxygen. Rapid burial of organic matter can produce such an environment.

With rapid burial, these organic matter can be broken down to produce oil and gas.

Keorgens are of different classes based on the type of organic matter that forms them.

We have type 1 Keorgen derieved from Algae

Type 2 kerogen is rich in marine and terrestrial organic matter.

Type 3 kerogen are made up of woody plants.

Chemical analysis of kerogen can tell us more about them.

Type 1 kerogen yeilds oil

Type 2 kerogen produce waxy oil

Type 3 kerogen produce gas

When Keorgen is broken down in a source rock, the oil migrates through a path into the reservoir rock from which it accumulates. A reservoir has a cap rock or seal to prevemt leak of.