Match the List-I with List-II
| List-I | List-II | ||
|---|---|---|---|
| Fuel gas | Major Constituents | ||
| (A) | Water gas | (I) | Butane, Propane |
| (B) | Coal gas | (II) | Hydrogen, Methane, Carbon monoxide |
| (C) | CNG | (III) | Methane, Ethane |
| (D) | LPG | (IV) | Carbon Monoxide, Hydrogen |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A-IV, B-II, C-III, D-I
Each fuel gas takes its make-up from the way it is produced: from coke and steam, from coal, or from natural gas and petroleum.
(A) Water gas — this matches (IV) Carbon Monoxide, Hydrogen. It is made by passing steam over red-hot coke, \(\ce{C + H2O -> CO + H2}\), so it is a mixture of carbon monoxide and hydrogen.
(B) Coal gas — this matches (II) Hydrogen, Methane, Carbon monoxide. It is obtained by heating coal in the absence of air; it is mostly hydrogen and methane, with some carbon monoxide.
(C) CNG — this matches (III) Methane, Ethane. Compressed natural gas is natural gas stored under high pressure, and natural gas is mainly methane with a little ethane.
(D) LPG — this matches (I) Butane, Propane. Liquefied petroleum gas, the gas of kitchen cylinders, is obtained from petroleum and is mainly butane and propane, kept liquid under pressure.