Which of the following statement is false ?

Options

A. London smog is oxidising in nature
B. London somg contains `H_(2)SO_(4)`
C. London somg is formed in winter
D. London smog causes bronchitis

Answer

To determine which statement is false regarding London smoke, let's analyze the characteristics and components of London smoke step-by-step.

### Step 1: Understanding London Smoke
London smoke is primarily formed due to the combustion of fossil fuels, which releases sulfur dioxide (SO2) into the atmosphere. This SO2 can react with water vapor and oxygen to form sulfuric acid (H2SO4).

**Hint:** Consider the components that contribute to the formation of London smoke.

### Step 2: Identifying the Nature of SO2
Sulfur dioxide (SO2) is known to have a reducing nature. This means it can donate electrons in reactions, which is a characteristic of reducing agents.

**Hint:** Recall the definitions of oxidizing and reducing agents in chemistry.

### Step 3: Conditions for Formation
London smoke typically forms during the winter months or in the early morning hours when temperatures are low. This is when the conditions are right for the combination of smoke and fog, leading to the phenomenon known as "smog."

**Hint:** Think about the environmental conditions that favor the formation of smog.

### Step 4: Health Effects
London smoke is known to cause respiratory problems, including bronchitis. The presence of sulfur compounds in the smoke can irritate the lungs and exacerbate existing health issues.

**Hint:** Consider the health implications of air pollution and its components.

### Step 5: Analyzing the Statements
Now, we need to evaluate the statements provided in the question. The statements likely include information about the nature of London smoke, its components, the conditions under which it forms, and its health effects.

From the video, the false statement identified is that "London smoke is reducing in nature." However, this is incorrect because London smoke is indeed associated with reducing agents like SO2.

**Hint:** Compare the statements to the established facts about London smoke.

### Conclusion
After analyzing the components, nature, conditions, and health effects of London smoke, we conclude that the statement claiming "London smoke is reducing in nature" is true. Therefore, any statement that contradicts this fact would be false.

**Final Answer:** The false statement is the one that incorrectly describes the nature of London smoke.