Current Affairs Question - 25 May 2022

With reference to the Coal Gasification and Coal Liquefaction, consider the following statements:

1. Coal Gasification is a process in which coal is partially oxidised with air, oxygen, steam or carbon dioxide to form a fuel gas.
2. Coal Gasification produces Syngas which is a mixture consisting primarily of methane (CH4), carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2) and water vapour (H2O).
3. Coal Liquefaction is an alternative route to produce diesel and gasoline and makes economic sense only in a world of high crude oil prices.
4. Coal Liquefaction involves gasification of coal, which in turn will produce synthetic gas (a mix of CO+H2). The synthetic gas can be liquefied to its fuel equivalent in presence of cobalt/iron-based catalysts at higher pressure and temperature.

Which of the statements given above is/are correct?

Consider the following statements:

1. Scientists recently said that one of Jupiter’s moons, Europa, a prime candidate for life in the solar system, might have an abundance of water pockets beneath formations called double ridges.
2. The double ridges found on Europa’s surface are similar to those seen on Earth’s Greenland ice sheet.
3. Europa is slightly bigger than Earth’s moon.

Which of the above statement(s) is/are true?