A green house effect causing gas which turns lime water milky. When is treated with carbon gives compound B. which of the following statements is not correct regarding B?

Options

A. It binds with haemoglobin
B. It is also green house effect causing gas
C. It is one of serious air polluted
D. It is lethal gas.

Answer

To solve the question step by step, we will identify the gas that causes the greenhouse effect and turns lime water milky, determine the compound formed when it reacts with carbon, and then evaluate the statements regarding this compound to find the incorrect one.

### Step 1: Identify the greenhouse gas that turns lime water milky.
- The gas that turns lime water milky is carbon dioxide (CO₂). This is a standard test for carbon dioxide, as it reacts with calcium hydroxide in lime water to form calcium carbonate, which is insoluble and appears milky.

### Step 2: Determine the compound formed when CO₂ reacts with carbon.
- When carbon dioxide (CO₂) is treated with carbon (C), it reduces to form carbon monoxide (CO). The reaction can be represented as:
\[ \text{CO}_2 + \text{C} \rightarrow 2 \text{CO} \]
- Therefore, the compound B is carbon monoxide (CO).

### Step 3: Evaluate the statements regarding compound B (carbon monoxide).
- We need to check which statement about carbon monoxide is not correct. The possible statements could include:
1. It binds with hemoglobin.
2. It is a greenhouse gas.
3. It is a serious air pollutant.
4. It is a lethal gas.

### Step 4: Analyze each statement.
1. **It binds with hemoglobin.**
- This statement is correct. Carbon monoxide binds with hemoglobin to form carboxyhemoglobin, which reduces the oxygen-carrying capacity of blood.

2. **It is a greenhouse gas.**
- This statement is incorrect. Carbon monoxide is not classified as a greenhouse gas. Greenhouse gases include carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), and water vapor, but not carbon monoxide.

3. **It is a serious air pollutant.**
- This statement is correct. Carbon monoxide is indeed a serious air pollutant and poses health risks.

4. **It is a lethal gas.**
- This statement is correct. Carbon monoxide is a poisonous gas and can be lethal in high concentrations.

### Conclusion:
- The statement that is not correct regarding compound B (carbon monoxide) is that it is a greenhouse gas.

### Final Answer:
- The statement that is not correct regarding compound B is: **It is a greenhouse gas.**

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