Question

The mixture of CO and $N{{O}_{2}}$ is called as:
[A] Water gas
[B] Producer gas
[C] Synthetic gas
[D] Marsh gas

Answer 1

Hint: The gas which is the correct answer here is combustible. It contains both flammable and non-flammable gases. It can be used as a fuel for gas turbines as it has a low calorific value. It is prepared by blowing steam through hot coke or coal.

Complete answer:
To answer this question, we have to know the compositions of water gas, producer gas, synthetic gas and marsh gas. So let us discuss them one by one.
Firstly, we have water gas. Water gas consists of a mixture of carbon monoxide and hydrogen. We use it for the removal of carbon monoxide from fuel cell applications. Water gas is named ‘water’ gas due to the involvement of water steam in its preparation. A white hot hard coal or coke is blasted with steam and it produces carbon monoxide and hydrogen.
Next, we have producer gas. Producer gas is a combustible gas and it is manufactured by blowing steam through hot coke or coal so that the fuel is completely gasified. It consists mainly of carbon monoxide and hydrogen along with nitrogen. It might also contain some amount of carbon dioxide. It is mainly used in large industrial furnaces as a fuel.
Then we have synthetic gas. Synthetic gas is also known as syngas and is a gas which mainly consists of a mixture of hydrogen, carbon monoxide and sometimes carbon dioxide. It is an artificially produced version of natural gas thus the name SYN, synthetic natural gas. We can produce this by gasifying any carbon containing mass like coke, coal and biomass which is then converted to methane which is the major component of natural gas.
And lastly we have marsh gas. Marsh gas is also called swamp gas and is a mixture of hydrogen sulphide, carbon dioxide and methane and it is produced by anaerobic bacterial decomposition of vegetables and other is produced naturally in swamps and marshes.
As we can understand from the above discussion that producer gas contains carbon monoxide and nitrogen.

Therefore, the correct answer is option [B] Producer gas.

Note: There are certain advantages to producer gas thus it was used in industrial fuels for iron and steel manufacture earlier. It can be produced even by the cheapest fuel and there is no loss due to smoke and convection current. Its transmission is easier compared to solid fuel and it also helps gas-fired furnaces to maintain a constant temperature.