For the following three reactions a, b and c, equilibrium constants are given:
a. CO (g) + H₂O (g) $$\leftrightharpoons$$ CO₂(g) + H₂ (g) ; K₁
b. CH₄ (g) + H₂O (g) $$\leftrightharpoons$$ CO(g) + 3H₂ (g) ; K₂
c. CH₄ (g) + 2H₂O (g) $$\leftrightharpoons$$ CO₂(g) + 4H₂ (g) ; K₃

In context with the industrial preparation of hydrogen from water gas (CO + H₂), which of the following is the correct statement?

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

The hydrocarbon which can react with sodium in liquid ammonia is