Gaseous fuels due to their advantages over ther tupes of fuels are becoming highly popular . The advantages fo the fgaseous fuels are as follows :
a. High calorigic value .
b. Do not produce smoke and do not leave ash after combstion .
c. They can flow through pipes and can be ignige at a moment's notic eat any place . No sp-ecial devices are required for their combustion .
i. Coal gas is a good gaseous fuel as it conitains `95^5` combustible gaseous such as `H_2, CH_4, CO` etc , It is obtained buy destructive distillation of coal at ` 100^@ C` .
ii. Water gas is a mixture of ` CO` and `H_2` and is prepared by passing steam over incandescnt coke . The reaction is owever endothermic .
iii. Producer gas , which possesses low calorific value, so prepared by passing aair over red hot coke . It contains mainly nitrogen and ` CO`
iv. Semi-water gas is a mixture of water fas and producer fas .
v. oil gas , which is used in laboratries , is obtained by cracking of kerosene . It is a mixture of hydrocarbon (saturated and unsatureated ) mainly lower hudrocarons .
iv. `LPG`, which contains ` C_3` and ` C_4` hydrocarbon of the alkane and alkene serties , suppied in cylinders for domestic uses is very populsr these days .
Producer fas is .

Options

A. `CO+H_2`
B. `CO+N_2`
C. `CO+CH_4+H_2`
D. `CO+H_2O`

Answer

To solve the question regarding producer gas, we will analyze the information provided about various gaseous fuels and identify the correct composition of producer gas.

### Step-by-Step Solution:

1. **Understanding Gaseous Fuels**:
- Gaseous fuels have several advantages such as high calorific value, no smoke production, and ease of ignition. They can be transported through pipes and do not require special devices for combustion.

2. **Identifying Different Gaseous Fuels**:
- **Coal Gas**: Contains combustible gases like H₂, CH₄, and CO.
- **Water Gas**: A mixture of CO and H₂, produced by passing steam over incandescent coke.
- **Producer Gas**: Contains mainly nitrogen (N₂) and CO. It is produced by passing air over red-hot coke.
- **Semi-Water Gas**: A mixture of water gas and producer gas.
- **Oil Gas**: Obtained by cracking kerosene, consisting of various hydrocarbons.
- **LPG**: Composed of C₃ and C₄ hydrocarbons, used for domestic purposes.

3. **Analyzing the Question**:
- The question specifically asks about the composition of producer gas. From the information provided, producer gas is defined as a mixture that contains mainly nitrogen and carbon monoxide.

4. **Evaluating the Options**:
- **Option 1**: CO and H₂ - This describes water gas, not producer gas.
- **Option 2**: CO and N₂ - This matches the description of producer gas.
- **Option 3**: CO, CH₄, and H₂ - This describes coal gas, not producer gas.
- **Option 4**: CO and H₂O - This is not a correct representation of producer gas.

5. **Conclusion**:
- The correct answer regarding the composition of producer gas is **Option 2: Carbon monoxide and nitrogen (CO + N₂)**.

### Final Answer:
The correct composition of producer gas is **carbon monoxide (CO) and nitrogen (N₂)**.

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