Q. Consider the following pairs:

1. Bergius process - Hydrogenation of coal to produce liquid hydrocarbon
2. Karrick process - Low-temperature carbonization of coal
3. Fischer–Tropsch process - Converts a mixture of carbon dioxide and hydrogen into liquid hydrocarbons

  Which of the above is/are correct?
Answer: 1, 2 & 3
Notes: Fischer-Tropsch process converts a mixture of carbon monoxide and hydrogen into liquid hydrocarbon. The Bergius process is a method of production of liquid hydrocarbons by hydrogenation of high-volatile bituminous coal at high temperatures and pressure. The Karrick process is related to low temperature coal carbonization. It could be used to distil out synthetic fuels-unconventional oil and syngas.