Question

Which of these is not obtained from petroleum?

• A. biogas
• B. LPG
• C. diesel
• D. kerosene

Answer 1

The correct option is A

biogas

The explanation for the correct option

Option A: biogas

1. Biomass has chemical energy stored in it.
2. In rural areas, agricultural waste and animal dung are used as sources of energy.
3. These are usually burnt in the air to obtain heat. However, this is not an efficient method to utilize biomass. A more effective method is to convert biomass into a gaseous fuel called biogas.
4. This can be done by mixing biomass with water and keeping it in a tank away from air.
5. In the absence of air, biomass decomposes to give methane, carbon dioxide, and other gases. This mixture of gases is called biogas.

The explanation for the incorrect options

Option C: diesel

The most common type of diesel fuel is a specific fractional distillate of petroleum fuel oil.

Option B: LPG

1. Petroleum gas is obtained as a by-product during the fractional distillation of petroleum It mainly consists of butane.
2. Butane can be easily liquefied under high pressure.
3. It is supplied in liquid form in cylinders for domestic use. Cooking gas cylinders used in our homes contain liquefied petroleum gas (LPG).

Option D: kerosene

1. Kerosene is a flammable liquid mixture of chemicals that are produced in the distillation of crude oil.
2. To produce kerosene, crude oil is distilled in a distillation tower in a process similar to that used to produce diesel and petrol.
3. It is a medium-weight distillate in the refining process and can be produced by distilling crude oil.

Thus, biogas is not obtained from petroleum.

Hence, option (A) is correct.