The full form of C.N.G is:
  • A
    Compound Natural Gas
  • B
    Complex Natural Gas
  • C
    Compound New Gas
  • D
    Compressed Natural Gas

Solution

CNG is made by compressing natural gas (which is mainly composed of methane, CH4), to less than 1 percent of the volume, it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 2025 MPa (2,9003,600 psi), usually in cylindrical or spherical shapes. Thus it is also called Compressed natural gas (CNG) (Methane stored at high pressure).